diff --git a/.travis.yml b/.travis.yml
index bf433bef5e..dd4be41a31 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -83,7 +83,7 @@ install:
   - git clone https://github.com/openresty/rds-json-nginx-module.git ../rds-json-nginx-module
   - git clone https://github.com/openresty/srcache-nginx-module.git ../srcache-nginx-module
   - git clone https://github.com/openresty/redis2-nginx-module.git ../redis2-nginx-module
-  - git clone https://github.com/openresty/lua-resty-core.git ../lua-resty-core
+  - git clone -b exit_worker https://github.com/rainingmaster/lua-resty-core.git ../lua-resty-core
   - git clone https://github.com/openresty/lua-resty-lrucache.git ../lua-resty-lrucache
   - git clone https://github.com/openresty/lua-resty-mysql.git ../lua-resty-mysql
   - git clone https://github.com/openresty/lua-resty-string.git ../lua-resty-string
diff --git a/README.markdown b/README.markdown
index 4046dfe15f..bd29909b53 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1064,6 +1064,8 @@ Directives
 * [init_worker_by_lua](#init_worker_by_lua)
 * [init_worker_by_lua_block](#init_worker_by_lua_block)
 * [init_worker_by_lua_file](#init_worker_by_lua_file)
+* [exit_worker_by_lua_block](#exit_worker_by_lua_block)
+* [exit_worker_by_lua_file](#exit_worker_by_lua_file)
 * [set_by_lua](#set_by_lua)
 * [set_by_lua_block](#set_by_lua_block)
 * [set_by_lua_file](#set_by_lua_file)
@@ -1578,6 +1580,47 @@ This hook no longer runs in the cache manager and cache loader processes since t
 
 [Back to TOC](#directives)
 
+exit_worker_by_lua_block
+------------------------
+
+**syntax:** *exit_worker_by_lua_block { lua-script }*
+
+**context:** *http*
+
+**phase:** *exiting-worker*
+
+Runs the specified Lua code upon every Nginx worker process's exit when the master process is enabled. When the master process is disabled, this hook will run before the Nginx process exits.
+
+This hook is often used to release resources allocated by each worker (e.g. resources allocated by [init_worker_by_lua*](#init_worker_by_lua)), or to prevent workers from exiting abnormally.
+
+For example,
+
+```nginx
+
+ exit_worker_by_lua_block {
+     print("log from exit_worker_by_lua_block")
+ }
+```
+
+This directive was first introduced in the `v0.10.18` release.
+
+[Back to TOC](#directives)
+
+exit_worker_by_lua_file
+-----------------------
+
+**syntax:** *exit_worker_by_lua_file &lt;path-to-lua-script-file&gt;*
+
+**context:** *http*
+
+**phase:** *exiting-worker*
+
+Similar to [exit_worker_by_lua_block](#exit_worker_by_lua_block), but accepts the file path to a Lua source file or Lua bytecode file.
+
+This directive was first introduced in the `v0.10.18` release.
+
+[Back to TOC](#directives)
+
 set_by_lua
 ----------
 
@@ -3577,7 +3620,7 @@ HTTP status constants
 Nginx log level constants
 -------------------------
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 ```lua
 
@@ -3601,7 +3644,7 @@ print
 
 **syntax:** *print(...)*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Writes argument values into the Nginx `error.log` file with the `ngx.NOTICE` log level.
 
@@ -3621,7 +3664,7 @@ There is a hard coded `2048` byte limitation on error message lengths in the Ngi
 ngx.ctx
 -------
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This table can be used to store per-request Lua context data and has a life time identical to the current request (as with the Nginx variables).
 
@@ -5448,7 +5491,7 @@ ngx.log
 
 **syntax:** *ngx.log(log_level, ...)*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Log arguments concatenated to error.log with the given logging level.
 
@@ -5595,7 +5638,7 @@ ngx.escape_uri
 
 **syntax:** *newstr = ngx.escape_uri(str, type?)*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Since `v0.10.16`, this function accepts an optional `type` argument.
 It accepts the following values (defaults to `2`):
@@ -5614,7 +5657,7 @@ ngx.unescape_uri
 
 **syntax:** *newstr = ngx.unescape_uri(str)*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Unescape `str` as an escaped URI component.
 
@@ -5878,7 +5921,7 @@ ngx.today
 
 **syntax:** *str = ngx.today()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns current date (in the format `yyyy-mm-dd`) from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -5891,7 +5934,7 @@ ngx.time
 
 **syntax:** *secs = ngx.time()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the elapsed seconds from the epoch for the current time stamp from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -5904,7 +5947,7 @@ ngx.now
 
 **syntax:** *secs = ngx.now()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns a floating-point number for the elapsed time in seconds (including milliseconds as the decimal part) from the epoch for the current time stamp from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -5919,7 +5962,7 @@ ngx.update_time
 
 **syntax:** *ngx.update_time()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Forcibly updates the Nginx current time cache. This call involves a syscall and thus has some overhead, so do not abuse it.
 
@@ -5932,7 +5975,7 @@ ngx.localtime
 
 **syntax:** *str = ngx.localtime()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the current time stamp (in the format `yyyy-mm-dd hh:mm:ss`) of the Nginx cached time (no syscall involved unlike Lua's [os.date](https://www.lua.org/manual/5.1/manual.html#pdf-os.date) function).
 
@@ -5945,7 +5988,7 @@ ngx.utctime
 
 **syntax:** *str = ngx.utctime()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the current time stamp (in the format `yyyy-mm-dd hh:mm:ss`) of the Nginx cached time (no syscall involved unlike Lua's [os.date](https://www.lua.org/manual/5.1/manual.html#pdf-os.date) function).
 
@@ -5958,7 +6001,7 @@ ngx.cookie_time
 
 **syntax:** *str = ngx.cookie_time(sec)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns a formatted string can be used as the cookie expiration time. The parameter `sec` is the time stamp in seconds (like those returned from [ngx.time](#ngxtime)).
 
@@ -5975,7 +6018,7 @@ ngx.http_time
 
 **syntax:** *str = ngx.http_time(sec)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns a formated string can be used as the http header time (for example, being used in `Last-Modified` header). The parameter `sec` is the time stamp in seconds (like those returned from [ngx.time](#ngxtime)).
 
@@ -5992,7 +6035,7 @@ ngx.parse_http_time
 
 **syntax:** *sec = ngx.parse_http_time(str)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Parse the http time string (as returned by [ngx.http_time](#ngxhttp_time)) into seconds. Returns the seconds or `nil` if the input string is in bad forms.
 
@@ -6022,7 +6065,7 @@ ngx.re.match
 
 **syntax:** *captures, err = ngx.re.match(subject, regex, options?, ctx?, res_table?)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Matches the `subject` string using the Perl compatible regular expression `regex` with the optional `options`.
 
@@ -6181,7 +6224,7 @@ ngx.re.find
 
 **syntax:** *from, to, err = ngx.re.find(subject, regex, options?, ctx?, nth?)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Similar to [ngx.re.match](#ngxrematch) but only returns the beginning index (`from`) and end index (`to`) of the matched substring. The returned indexes are 1-based and can be fed directly into the [string.sub](https://www.lua.org/manual/5.1/manual.html#pdf-string.sub) API function to obtain the matched substring.
 
@@ -6236,7 +6279,7 @@ ngx.re.gmatch
 
 **syntax:** *iterator, err = ngx.re.gmatch(subject, regex, options?)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Similar to [ngx.re.match](#ngxrematch), but returns a Lua iterator instead, so as to let the user programmer iterate all the matches over the `<subject>` string argument with the PCRE `regex`.
 
@@ -6315,7 +6358,7 @@ ngx.re.sub
 
 **syntax:** *newstr, n, err = ngx.re.sub(subject, regex, replace, options?)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Substitutes the first match of the Perl compatible regular expression `regex` on the `subject` argument string with the string or function argument `replace`. The optional `options` argument has exactly the same meaning as in [ngx.re.match](#ngxrematch).
 
@@ -6383,7 +6426,7 @@ ngx.re.gsub
 
 **syntax:** *newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Just like [ngx.re.sub](#ngxresub), but does global substitution.
 
@@ -6424,7 +6467,7 @@ ngx.shared.DICT
 
 **syntax:** *dict = ngx.shared\[name_var\]*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Fetching the shm-based Lua dictionary object for the shared memory zone named `DICT` defined by the [lua_shared_dict](#lua_shared_dict) directive.
 
@@ -7806,7 +7849,7 @@ ngx.get_phase
 
 **syntax:** *str = ngx.get_phase()*
 
-**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_by_lua&#42;, init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Retrieves the current running phase name. Possible return values are
 
@@ -7838,6 +7881,8 @@ Retrieves the current running phase name. Possible return values are
 	for the context of [log_by_lua*](#log_by_lua).
 * `timer`
 	for the context of user callback functions for [ngx.timer.*](#ngxtimerat).
+* `exit_worker`
+	for the context of [exit_worker_by_lua*](#exit_worker_by_lua).
 
 This API was first introduced in the `v0.5.10` release.
 
@@ -8147,7 +8192,7 @@ ngx.timer.at
 
 **syntax:** *hdl, err = ngx.timer.at(delay, callback, user_arg1, user_arg2, ...)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Creates an Nginx timer with a user callback function as well as optional user arguments.
 
@@ -8283,7 +8328,7 @@ ngx.timer.every
 
 **syntax:** *hdl, err = ngx.timer.every(delay, callback, user_arg1, user_arg2, ...)*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Similar to the [ngx.timer.at](#ngxtimerat) API function, but
 
@@ -8306,7 +8351,7 @@ ngx.timer.running_count
 
 **syntax:** *count = ngx.timer.running_count()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the number of timers currently running.
 
@@ -8319,7 +8364,7 @@ ngx.timer.pending_count
 
 **syntax:** *count = ngx.timer.pending_count()*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the number of pending timers.
 
@@ -8332,7 +8377,7 @@ ngx.config.subsystem
 
 **syntax:** *subsystem = ngx.config.subsystem*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This string field indicates the Nginx subsystem the current Lua environment is based on. For this module, this field always takes the string value `"http"`. For
 [ngx_stream_lua_module](https://github.com/openresty/stream-lua-nginx-module#readme), however, this field takes the value `"stream"`.
@@ -8346,7 +8391,7 @@ ngx.config.debug
 
 **syntax:** *debug = ngx.config.debug*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This boolean field indicates whether the current Nginx is a debug build, i.e., being built by the `./configure` option `--with-debug`.
 
@@ -8359,7 +8404,7 @@ ngx.config.prefix
 
 **syntax:** *prefix = ngx.config.prefix()*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the Nginx server "prefix" path, as determined by the `-p` command-line option when running the Nginx executable, or the path specified by the `--prefix` command-line option when building Nginx with the `./configure` script.
 
@@ -8372,7 +8417,7 @@ ngx.config.nginx_version
 
 **syntax:** *ver = ngx.config.nginx_version*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This field take an integral value indicating the version number of the current Nginx core being used. For example, the version number `1.4.3` results in the Lua number 1004003.
 
@@ -8411,7 +8456,7 @@ ngx.worker.exiting
 
 **syntax:** *exiting = ngx.worker.exiting()*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This function returns a boolean value indicating whether the current Nginx worker process already starts exiting. Nginx worker process exiting happens on Nginx server quit or configuration reload (aka HUP reload).
 
@@ -8424,7 +8469,7 @@ ngx.worker.pid
 
 **syntax:** *pid = ngx.worker.pid()*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This function returns a Lua number for the process ID (PID) of the current Nginx worker process. This API is more efficient than `ngx.var.pid` and can be used in contexts where the [ngx.var.VARIABLE](#ngxvarvariable) API cannot be used (like [init_worker_by_lua](#init_worker_by_lua)).
 
@@ -8437,7 +8482,7 @@ ngx.worker.count
 
 **syntax:** *count = ngx.worker.count()*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_by_lua&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the total number of the Nginx worker processes (i.e., the value configured
 by the [worker_processes](https://nginx.org/en/docs/ngx_core_module.html#worker_processes)
@@ -8452,7 +8497,7 @@ ngx.worker.id
 
 **syntax:** *id = ngx.worker.id()*
 
-**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_worker_by_lua&#42;*
+**context:** *set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, init_worker_by_lua&#42;, exit_worker_by_lua&#42;*
 
 Returns the ordinal number of the current Nginx worker processes (starting from number 0).
 
@@ -8557,7 +8602,7 @@ ndk.set_var.DIRECTIVE
 
 **syntax:** *res = ndk.set_var.DIRECTIVE_NAME*
 
-**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;*
+**context:** *init_worker_by_lua&#42;, set_by_lua&#42;, rewrite_by_lua&#42;, access_by_lua&#42;, content_by_lua&#42;, header_filter_by_lua&#42;, body_filter_by_lua&#42;, log_by_lua&#42;, ngx.timer.&#42;, balancer_by_lua&#42;, ssl_certificate_by_lua&#42;, ssl_session_fetch_by_lua&#42;, ssl_session_store_by_lua&#42;, exit_worker_by_lua&#42;*
 
 This mechanism allows calling other Nginx C modules' directives that are implemented by [Nginx Devel Kit](https://github.com/simplresty/ngx_devel_kit) (NDK)'s set_var submodule's `ndk_set_var_value`.
 
diff --git a/config b/config
index 18014aa97c..6cb951bb42 100644
--- a/config
+++ b/config
@@ -278,6 +278,7 @@ HTTP_LUA_SRCS=" \
             $ngx_addon_dir/src/ngx_http_lua_bodyfilterby.c \
             $ngx_addon_dir/src/ngx_http_lua_initby.c \
             $ngx_addon_dir/src/ngx_http_lua_initworkerby.c \
+            $ngx_addon_dir/src/ngx_http_lua_exitworkerby.c \
             $ngx_addon_dir/src/ngx_http_lua_socket_udp.c \
             $ngx_addon_dir/src/ngx_http_lua_req_method.c \
             $ngx_addon_dir/src/ngx_http_lua_phase.c \
@@ -339,6 +340,7 @@ HTTP_LUA_DEPS=" \
             $ngx_addon_dir/src/ngx_http_lua_bodyfilterby.h \
             $ngx_addon_dir/src/ngx_http_lua_initby.h \
             $ngx_addon_dir/src/ngx_http_lua_initworkerby.h \
+            $ngx_addon_dir/src/ngx_http_lua_exitworkerby.h \
             $ngx_addon_dir/src/ngx_http_lua_socket_udp.h \
             $ngx_addon_dir/src/ngx_http_lua_probe.h \
             $ngx_addon_dir/src/ngx_http_lua_uthread.h \
diff --git a/doc/HttpLuaModule.wiki b/doc/HttpLuaModule.wiki
index 37d8a1367b..04a2694972 100644
--- a/doc/HttpLuaModule.wiki
+++ b/doc/HttpLuaModule.wiki
@@ -1281,6 +1281,40 @@ This directive was first introduced in the <code>v0.9.5</code> release.
 
 This hook no longer runs in the cache manager and cache loader processes since the <code>v0.10.12</code> release.
 
+== exit_worker_by_lua_block ==
+
+'''syntax:''' ''exit_worker_by_lua_block { lua-script }''
+
+'''context:''' ''http''
+
+'''phase:''' ''exiting-worker''
+
+Runs the specified Lua code upon every Nginx worker process's exit when the master process is enabled. When the master process is disabled, this hook will run before the Nginx process exits.
+
+This hook is often used to release resources allocated by each worker (e.g. resources allocated by [[#init_worker_by_lua|init_worker_by_lua*]]), or to prevent workers from exiting abnormally.
+
+For example,
+
+<geshi lang="nginx">
+    exit_worker_by_lua_block {
+        print("log from exit_worker_by_lua_block")
+    }
+</geshi>
+
+This directive was first introduced in the <code>v0.10.18</code> release.
+
+== exit_worker_by_lua_file ==
+
+'''syntax:''' ''exit_worker_by_lua_file <path-to-lua-script-file>''
+
+'''context:''' ''http''
+
+'''phase:''' ''exiting-worker''
+
+Similar to [[#exit_worker_by_lua_block|exit_worker_by_lua_block]], but accepts the file path to a Lua source file or Lua bytecode file.
+
+This directive was first introduced in the <code>v0.10.18</code> release.
+
 == set_by_lua ==
 
 '''syntax:''' ''set_by_lua $res <lua-script-str> [$arg1 $arg2 ...]''
@@ -2913,7 +2947,7 @@ These constants are usually used in [[#ngx.location.capture|ngx.location.capture
 
 == Nginx log level constants ==
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 <geshi lang="lua">
   ngx.STDERR
@@ -2933,7 +2967,7 @@ These constants are usually used by the [[#ngx.log|ngx.log]] method.
 
 '''syntax:''' ''print(...)''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Writes argument values into the Nginx <code>error.log</code> file with the <code>ngx.NOTICE</code> log level.
 
@@ -2949,7 +2983,7 @@ There is a hard coded <code>2048</code> byte limitation on error message lengths
 
 == ngx.ctx ==
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, exit_worker_by_lua*''
 
 This table can be used to store per-request Lua context data and has a life time identical to the current request (as with the Nginx variables).
 
@@ -4573,7 +4607,7 @@ Just as [[#ngx.print|ngx.print]] but also emit a trailing newline.
 
 '''syntax:''' ''ngx.log(log_level, ...)''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Log arguments concatenated to error.log with the given logging level.
 
@@ -4700,7 +4734,7 @@ This method was introduced in the <code>0.5.0rc30</code> release.
 
 '''syntax:''' ''newstr = ngx.escape_uri(str, type?)''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Since `v0.10.16`, this function accepts an optional <code>type</code> argument.
 It accepts the following values (defaults to `2`):
@@ -4716,7 +4750,7 @@ alphabetic characters, digits, <code>-</code>, <code>.</code>, <code>_</code>,
 
 '''syntax:''' ''newstr = ngx.unescape_uri(str)''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, exit_worker_by_lua*''
 
 Unescape <code>str</code> as an escaped URI component.
 
@@ -4937,7 +4971,7 @@ Returns a quoted SQL string literal according to the MySQL quoting rules.
 
 '''syntax:''' ''str = ngx.today()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns current date (in the format <code>yyyy-mm-dd</code>) from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -4947,7 +4981,7 @@ This is the local time.
 
 '''syntax:''' ''secs = ngx.time()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns the elapsed seconds from the epoch for the current time stamp from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -4957,7 +4991,7 @@ Updates of the Nginx time cache can be forced by calling [[#ngx.update_time|ngx.
 
 '''syntax:''' ''secs = ngx.now()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns a floating-point number for the elapsed time in seconds (including milliseconds as the decimal part) from the epoch for the current time stamp from the Nginx cached time (no syscall involved unlike Lua's date library).
 
@@ -4969,7 +5003,7 @@ This API was first introduced in <code>v0.3.1rc32</code>.
 
 '''syntax:''' ''ngx.update_time()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Forcibly updates the Nginx current time cache. This call involves a syscall and thus has some overhead, so do not abuse it.
 
@@ -4979,7 +5013,7 @@ This API was first introduced in <code>v0.3.1rc32</code>.
 
 '''syntax:''' ''str = ngx.localtime()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns the current time stamp (in the format <code>yyyy-mm-dd hh:mm:ss</code>) of the Nginx cached time (no syscall involved unlike Lua's [https://www.lua.org/manual/5.1/manual.html#pdf-os.date os.date] function).
 
@@ -4989,7 +5023,7 @@ This is the local time.
 
 '''syntax:''' ''str = ngx.utctime()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns the current time stamp (in the format <code>yyyy-mm-dd hh:mm:ss</code>) of the Nginx cached time (no syscall involved unlike Lua's [https://www.lua.org/manual/5.1/manual.html#pdf-os.date os.date] function).
 
@@ -4999,7 +5033,7 @@ This is the UTC time.
 
 '''syntax:''' ''str = ngx.cookie_time(sec)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns a formatted string can be used as the cookie expiration time. The parameter <code>sec</code> is the time stamp in seconds (like those returned from [[#ngx.time|ngx.time]]).
 
@@ -5012,7 +5046,7 @@ Returns a formatted string can be used as the cookie expiration time. The parame
 
 '''syntax:''' ''str = ngx.http_time(sec)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns a formated string can be used as the http header time (for example, being used in <code>Last-Modified</code> header). The parameter <code>sec</code> is the time stamp in seconds (like those returned from [[#ngx.time|ngx.time]]).
 
@@ -5025,7 +5059,7 @@ Returns a formated string can be used as the http header time (for example, bein
 
 '''syntax:''' ''sec = ngx.parse_http_time(str)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Parse the http time string (as returned by [[#ngx.http_time|ngx.http_time]]) into seconds. Returns the seconds or <code>nil</code> if the input string is in bad forms.
 
@@ -5048,7 +5082,7 @@ Returns <code>true</code> if the current request is an Nginx subrequest, or <cod
 
 '''syntax:''' ''captures, err = ngx.re.match(subject, regex, options?, ctx?, res_table?)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Matches the <code>subject</code> string using the Perl compatible regular expression <code>regex</code> with the optional <code>options</code>.
 
@@ -5196,7 +5230,7 @@ This feature was introduced in the <code>v0.2.1rc11</code> release.
 
 '''syntax:''' ''from, to, err = ngx.re.find(subject, regex, options?, ctx?, nth?)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Similar to [[#ngx.re.match|ngx.re.match]] but only returns the beginning index (<code>from</code>) and end index (<code>to</code>) of the matched substring. The returned indexes are 1-based and can be fed directly into the [https://www.lua.org/manual/5.1/manual.html#pdf-string.sub string.sub] API function to obtain the matched substring.
 
@@ -5246,7 +5280,7 @@ This API function was first introduced in the <code>v0.9.2</code> release.
 
 '''syntax:''' ''iterator, err = ngx.re.gmatch(subject, regex, options?)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Similar to [[#ngx.re.match|ngx.re.match]], but returns a Lua iterator instead, so as to let the user programmer iterate all the matches over the <code><subject></code> string argument with the PCRE <code>regex</code>.
 
@@ -5320,7 +5354,7 @@ This feature was first introduced in the <code>v0.2.1rc12</code> release.
 
 '''syntax:''' ''newstr, n, err = ngx.re.sub(subject, regex, replace, options?)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Substitutes the first match of the Perl compatible regular expression <code>regex</code> on the <code>subject</code> argument string with the string or function argument <code>replace</code>. The optional <code>options</code> argument has exactly the same meaning as in [[#ngx.re.match|ngx.re.match]].
 
@@ -5381,7 +5415,7 @@ This feature was first introduced in the <code>v0.2.1rc13</code> release.
 
 '''syntax:''' ''newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Just like [[#ngx.re.sub|ngx.re.sub]], but does global substitution.
 
@@ -5417,7 +5451,7 @@ This feature was first introduced in the <code>v0.2.1rc15</code> release.
 
 '''syntax:''' ''dict = ngx.shared[name_var]''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Fetching the shm-based Lua dictionary object for the shared memory zone named <code>DICT</code> defined by the [[#lua_shared_dict|lua_shared_dict]] directive.
 
@@ -6643,7 +6677,7 @@ This feature was first introduced in the <code>v0.5.0rc1</code> release.
 
 '''syntax:''' ''str = ngx.get_phase()''
 
-'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Retrieves the current running phase name. Possible return values are
 
@@ -6675,6 +6709,8 @@ Retrieves the current running phase name. Possible return values are
 : for the context of [[#log_by_lua|log_by_lua*]].
 * <code>timer</code>
 : for the context of user callback functions for [[#ngx.timer.at|ngx.timer.*]].
+* <code>exit_worker</code>
+: for the context of [[#exit_worker_by_lua|exit_worker_by_lua*]].
 
 This API was first introduced in the <code>v0.5.10</code> release.
 
@@ -6964,7 +7000,7 @@ See also [[#lua_check_client_abort|lua_check_client_abort]].
 
 '''syntax:''' ''hdl, err = ngx.timer.at(delay, callback, user_arg1, user_arg2, ...)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Creates an Nginx timer with a user callback function as well as optional user arguments.
 
@@ -7095,7 +7131,7 @@ This API was first introduced in the <code>v0.8.0</code> release.
 
 '''syntax:''' ''hdl, err = ngx.timer.every(delay, callback, user_arg1, user_arg2, ...)''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Similar to the [[#ngx.timer.at|ngx.timer.at]] API function, but
 
@@ -7115,7 +7151,7 @@ This API was first introduced in the <code>v0.10.9</code> release.
 
 '''syntax:''' ''count = ngx.timer.running_count()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns the number of timers currently running.
 
@@ -7125,7 +7161,7 @@ This directive was first introduced in the <code>v0.9.20</code> release.
 
 '''syntax:''' ''count = ngx.timer.pending_count()''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 Returns the number of pending timers.
 
@@ -7135,7 +7171,7 @@ This directive was first introduced in the <code>v0.9.20</code> release.
 
 '''syntax:''' ''subsystem = ngx.config.subsystem''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 This string field indicates the Nginx subsystem the current Lua environment is based on. For this module, this field always takes the string value <code>"http"</code>. For
 [https://github.com/openresty/stream-lua-nginx-module#readme ngx_stream_lua_module], however, this field takes the value <code>"stream"</code>.
@@ -7146,7 +7182,7 @@ This field was first introduced in the <code>0.10.1</code>.
 
 '''syntax:''' ''debug = ngx.config.debug''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 This boolean field indicates whether the current Nginx is a debug build, i.e., being built by the <code>./configure</code> option <code>--with-debug</code>.
 
@@ -7156,7 +7192,7 @@ This field was first introduced in the <code>0.8.7</code>.
 
 '''syntax:''' ''prefix = ngx.config.prefix()''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 Returns the Nginx server "prefix" path, as determined by the <code>-p</code> command-line option when running the Nginx executable, or the path specified by the <code>--prefix</code> command-line option when building Nginx with the <code>./configure</code> script.
 
@@ -7166,7 +7202,7 @@ This function was first introduced in the <code>0.9.2</code>.
 
 '''syntax:''' ''ver = ngx.config.nginx_version''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 This field take an integral value indicating the version number of the current Nginx core being used. For example, the version number <code>1.4.3</code> results in the Lua number 1004003.
 
@@ -7196,7 +7232,7 @@ This API was first introduced in the <code>0.9.3</code> release.
 
 '''syntax:''' ''exiting = ngx.worker.exiting()''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 This function returns a boolean value indicating whether the current Nginx worker process already starts exiting. Nginx worker process exiting happens on Nginx server quit or configuration reload (aka HUP reload).
 
@@ -7206,7 +7242,7 @@ This API was first introduced in the <code>0.9.3</code> release.
 
 '''syntax:''' ''pid = ngx.worker.pid()''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 This function returns a Lua number for the process ID (PID) of the current Nginx worker process. This API is more efficient than <code>ngx.var.pid</code> and can be used in contexts where the [[#ngx.var.VARIABLE|ngx.var.VARIABLE]] API cannot be used (like [[#init_worker_by_lua|init_worker_by_lua]]).
 
@@ -7216,7 +7252,7 @@ This API was first introduced in the <code>0.9.5</code> release.
 
 '''syntax:''' ''count = ngx.worker.count()''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_by_lua*, init_worker_by_lua*, exit_worker_by_lua*''
 
 Returns the total number of the Nginx worker processes (i.e., the value configured
 by the [https://nginx.org/en/docs/ngx_core_module.html#worker_processes worker_processes]
@@ -7228,7 +7264,7 @@ This API was first introduced in the <code>0.9.20</code> release.
 
 '''syntax:''' ''id = ngx.worker.id()''
 
-'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_worker_by_lua*''
+'''context:''' ''set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, init_worker_by_lua*, exit_worker_by_lua*''
 
 Returns the ordinal number of the current Nginx worker processes (starting from number 0).
 
@@ -7318,7 +7354,7 @@ This feature requires at least ngx_lua <code>v0.10.0</code>.
 
 '''syntax:''' ''res = ndk.set_var.DIRECTIVE_NAME''
 
-'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*''
+'''context:''' ''init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, exit_worker_by_lua*''
 
 This mechanism allows calling other Nginx C modules' directives that are implemented by [https://github.com/simplresty/ngx_devel_kit Nginx Devel Kit] (NDK)'s set_var submodule's <code>ndk_set_var_value</code>.
 
diff --git a/src/ngx_http_lua_common.h b/src/ngx_http_lua_common.h
index 1232984911..57c031f276 100644
--- a/src/ngx_http_lua_common.h
+++ b/src/ngx_http_lua_common.h
@@ -138,6 +138,7 @@ typedef struct {
 #define NGX_HTTP_LUA_CONTEXT_SSL_CERT       0x0400
 #define NGX_HTTP_LUA_CONTEXT_SSL_SESS_STORE 0x0800
 #define NGX_HTTP_LUA_CONTEXT_SSL_SESS_FETCH 0x1000
+#define NGX_HTTP_LUA_CONTEXT_EXIT_WORKER    0x2000
 
 
 #define NGX_HTTP_LUA_FFI_NO_REQ_CTX         -100
@@ -226,6 +227,9 @@ struct ngx_http_lua_main_conf_s {
     ngx_http_lua_main_conf_handler_pt    init_worker_handler;
     ngx_str_t                            init_worker_src;
 
+    ngx_http_lua_main_conf_handler_pt    exit_worker_handler;
+    ngx_str_t                            exit_worker_src;
+
     ngx_http_lua_balancer_peer_data_t      *balancer_peer_data;
                     /* neither yielding nor recursion is possible in
                      * balancer_by_lua*, so there cannot be any races among
diff --git a/src/ngx_http_lua_directive.c b/src/ngx_http_lua_directive.c
index 6b7ccc7cbe..1ec641e079 100644
--- a/src/ngx_http_lua_directive.c
+++ b/src/ngx_http_lua_directive.c
@@ -23,6 +23,7 @@
 #include "ngx_http_lua_bodyfilterby.h"
 #include "ngx_http_lua_initby.h"
 #include "ngx_http_lua_initworkerby.h"
+#include "ngx_http_lua_exitworkerby.h"
 #include "ngx_http_lua_shdict.h"
 #include "ngx_http_lua_ssl_certby.h"
 #include "ngx_http_lua_lex.h"
@@ -1200,6 +1201,64 @@ ngx_http_lua_init_worker_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
 }
 
 
+char *
+ngx_http_lua_exit_worker_by_lua_block(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf)
+{
+    char        *rv;
+    ngx_conf_t   save;
+
+    save = *cf;
+    cf->handler = ngx_http_lua_exit_worker_by_lua;
+    cf->handler_conf = conf;
+
+    rv = ngx_http_lua_conf_lua_block_parse(cf, cmd);
+
+    *cf = save;
+
+    return rv;
+}
+
+
+char *
+ngx_http_lua_exit_worker_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf)
+{
+    u_char                      *name;
+    ngx_str_t                   *value;
+    ngx_http_lua_main_conf_t    *lmcf = conf;
+
+    /*  must specify a content handler */
+    if (cmd->post == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    if (lmcf->exit_worker_handler) {
+        return "is duplicate";
+    }
+
+    value = cf->args->elts;
+
+    lmcf->exit_worker_handler = (ngx_http_lua_main_conf_handler_pt) cmd->post;
+
+    if (cmd->post == ngx_http_lua_exit_worker_by_file) {
+        name = ngx_http_lua_rebase_path(cf->pool, value[1].data,
+                                        value[1].len);
+        if (name == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        lmcf->exit_worker_src.data = name;
+        lmcf->exit_worker_src.len = ngx_strlen(name);
+
+    } else {
+        lmcf->exit_worker_src = value[1];
+    }
+
+    return NGX_CONF_OK;
+}
+
+
 #if defined(NDK) && NDK
 static ngx_int_t
 ngx_http_lua_set_by_lua_init(ngx_http_request_t *r)
diff --git a/src/ngx_http_lua_directive.h b/src/ngx_http_lua_directive.h
index 8555e2f364..adfba12761 100644
--- a/src/ngx_http_lua_directive.h
+++ b/src/ngx_http_lua_directive.h
@@ -53,6 +53,10 @@ char *ngx_http_lua_init_worker_by_lua_block(ngx_conf_t *cf,
     ngx_command_t *cmd, void *conf);
 char *ngx_http_lua_init_worker_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);
+char *ngx_http_lua_exit_worker_by_lua_block(ngx_conf_t *cf,
+    ngx_command_t *cmd, void *conf);
+char *ngx_http_lua_exit_worker_by_lua(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
 char *ngx_http_lua_code_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_http_lua_load_resty_core(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);
diff --git a/src/ngx_http_lua_exitworkerby.c b/src/ngx_http_lua_exitworkerby.c
new file mode 100644
index 0000000000..cd59dc4bed
--- /dev/null
+++ b/src/ngx_http_lua_exitworkerby.c
@@ -0,0 +1,111 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#ifndef DDEBUG
+#define DDEBUG 0
+#endif
+#include "ddebug.h"
+
+
+#include "ngx_http_lua_exitworkerby.h"
+#include "ngx_http_lua_util.h"
+
+
+void
+ngx_http_lua_exit_worker(ngx_cycle_t *cycle)
+{
+    ngx_http_lua_main_conf_t    *lmcf;
+    ngx_connection_t            *c = NULL;
+    ngx_http_request_t          *r = NULL;
+    ngx_http_lua_ctx_t          *ctx;
+    ngx_http_conf_ctx_t         *conf_ctx;
+
+    lmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_lua_module);
+    if (lmcf == NULL
+        || lmcf->exit_worker_handler == NULL
+        || lmcf->lua == NULL
+#if !(NGX_WIN32)
+        || (ngx_process == NGX_PROCESS_HELPER
+#   ifdef HAVE_PRIVILEGED_PROCESS_PATCH
+            && !ngx_is_privileged_agent
+#   endif
+           )
+#endif  /* NGX_WIN32 */
+       )
+    {
+        return;
+    }
+
+    conf_ctx = ((ngx_http_conf_ctx_t *) cycle->conf_ctx[ngx_http_module.index]);
+
+    c = ngx_http_lua_create_fake_connection(NULL);
+    if (c == NULL) {
+        goto failed;
+    }
+
+    c->log = ngx_cycle->log;
+
+    r = ngx_http_lua_create_fake_request(c);
+    if (r == NULL) {
+        goto failed;
+    }
+
+    r->main_conf = conf_ctx->main_conf;
+    r->srv_conf = conf_ctx->srv_conf;
+    r->loc_conf = conf_ctx->loc_conf;
+
+    ctx = ngx_http_lua_create_ctx(r);
+    if (ctx == NULL) {
+        goto failed;
+    }
+
+    ctx->context = NGX_HTTP_LUA_CONTEXT_EXIT_WORKER;
+    ctx->cur_co_ctx = NULL;
+
+    ngx_http_lua_set_req(lmcf->lua, r);
+
+    (void) lmcf->exit_worker_handler(cycle->log, lmcf, lmcf->lua);
+
+    ngx_destroy_pool(c->pool);
+    return;
+
+failed:
+
+    if (c) {
+        ngx_http_lua_close_fake_connection(c);
+    }
+
+    return;
+}
+
+
+ngx_int_t
+ngx_http_lua_exit_worker_by_inline(ngx_log_t *log,
+    ngx_http_lua_main_conf_t *lmcf, lua_State *L)
+{
+    int         status;
+
+    status = luaL_loadbuffer(L, (char *) lmcf->exit_worker_src.data,
+                             lmcf->exit_worker_src.len, "=exit_worker_by_lua")
+             || ngx_http_lua_do_call(log, L);
+
+    return ngx_http_lua_report(log, L, status, "exit_worker_by_lua");
+}
+
+
+ngx_int_t
+ngx_http_lua_exit_worker_by_file(ngx_log_t *log, ngx_http_lua_main_conf_t *lmcf,
+    lua_State *L)
+{
+    int         status;
+
+    status = luaL_loadfile(L, (char *) lmcf->exit_worker_src.data)
+             || ngx_http_lua_do_call(log, L);
+
+    return ngx_http_lua_report(log, L, status, "exit_worker_by_lua_file");
+}
+
+/* vi:set ft=c ts=4 sw=4 et fdm=marker: */
diff --git a/src/ngx_http_lua_exitworkerby.h b/src/ngx_http_lua_exitworkerby.h
new file mode 100644
index 0000000000..3a4274c042
--- /dev/null
+++ b/src/ngx_http_lua_exitworkerby.h
@@ -0,0 +1,25 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#ifndef _NGX_HTTP_LUA_EXITWORKERBY_H_INCLUDED_
+#define _NGX_HTTP_LUA_EXITWORKERBY_H_INCLUDED_
+
+
+#include "ngx_http_lua_common.h"
+
+
+ngx_int_t ngx_http_lua_exit_worker_by_inline(ngx_log_t *log,
+    ngx_http_lua_main_conf_t *lmcf, lua_State *L);
+
+ngx_int_t ngx_http_lua_exit_worker_by_file(ngx_log_t *log,
+    ngx_http_lua_main_conf_t *lmcf, lua_State *L);
+
+void ngx_http_lua_exit_worker(ngx_cycle_t *cycle);
+
+
+#endif /* _NGX_HTTP_LUA_EXITWORKERBY_H_INCLUDED_ */
+
+/* vi:set ft=c ts=4 sw=4 et fdm=marker: */
diff --git a/src/ngx_http_lua_module.c b/src/ngx_http_lua_module.c
index 9816d86441..098fe87add 100644
--- a/src/ngx_http_lua_module.c
+++ b/src/ngx_http_lua_module.c
@@ -22,6 +22,7 @@
 #include "ngx_http_lua_bodyfilterby.h"
 #include "ngx_http_lua_initby.h"
 #include "ngx_http_lua_initworkerby.h"
+#include "ngx_http_lua_exitworkerby.h"
 #include "ngx_http_lua_probe.h"
 #include "ngx_http_lua_semaphore.h"
 #include "ngx_http_lua_balancer.h"
@@ -229,6 +230,20 @@ static ngx_command_t ngx_http_lua_cmds[] = {
       0,
       (void *) ngx_http_lua_init_worker_by_file },
 
+    { ngx_string("exit_worker_by_lua_block"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
+      ngx_http_lua_exit_worker_by_lua_block,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      0,
+      (void *) ngx_http_lua_exit_worker_by_inline },
+
+    { ngx_string("exit_worker_by_lua_file"),
+      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
+      ngx_http_lua_exit_worker_by_lua,
+      NGX_HTTP_MAIN_CONF_OFFSET,
+      0,
+      (void *) ngx_http_lua_exit_worker_by_file },
+
 #if defined(NDK) && NDK
     /* set_by_lua_block $res { inline Lua code } */
     { ngx_string("set_by_lua_block"),
@@ -636,7 +651,7 @@ ngx_module_t ngx_http_lua_module = {
     ngx_http_lua_init_worker,   /*  init process */
     NULL,                       /*  init thread */
     NULL,                       /*  exit thread */
-    NULL,                       /*  exit process */
+    ngx_http_lua_exit_worker,   /*  exit process */
     NULL,                       /*  exit master */
     NGX_MODULE_V1_PADDING
 };
diff --git a/src/ngx_http_lua_util.h b/src/ngx_http_lua_util.h
index 57c0814bfb..52d804bff0 100644
--- a/src/ngx_http_lua_util.h
+++ b/src/ngx_http_lua_util.h
@@ -53,6 +53,7 @@
      : (c) == NGX_HTTP_LUA_CONTEXT_BODY_FILTER ? "body_filter_by_lua*"       \
      : (c) == NGX_HTTP_LUA_CONTEXT_TIMER ? "ngx.timer"                       \
      : (c) == NGX_HTTP_LUA_CONTEXT_INIT_WORKER ? "init_worker_by_lua*"       \
+     : (c) == NGX_HTTP_LUA_CONTEXT_EXIT_WORKER ? "exit_worker_by_lua*"       \
      : (c) == NGX_HTTP_LUA_CONTEXT_BALANCER ? "balancer_by_lua*"             \
      : (c) == NGX_HTTP_LUA_CONTEXT_SSL_CERT ? "ssl_certificate_by_lua*"      \
      : (c) == NGX_HTTP_LUA_CONTEXT_SSL_SESS_STORE ?                          \
diff --git a/t/089-phase.t b/t/089-phase.t
index 94b7619ec9..538dff8723 100644
--- a/t/089-phase.t
+++ b/t/089-phase.t
@@ -8,7 +8,7 @@ log_level('warn');
 
 repeat_each(2);
 
-plan tests => repeat_each() * (blocks() * 2 + 1);
+plan tests => repeat_each() * (blocks() * 2 + 2);
 
 #no_diff();
 #no_long_string();
@@ -176,3 +176,28 @@ GET /lua
 init_worker
 --- no_error_log
 [error]
+
+
+
+=== TEST 11: get_phase in exit_worker_by_lua
+--- http_config
+    exit_worker_by_lua_block {
+        local phase = ngx.get_phase()
+        ngx.log(ngx.ERR, phase)
+        ngx.log(ngx.ERR, "exiting now")
+    }
+--- config
+    location /lua {
+        content_by_lua_block {
+            ngx.say("ok")
+        }
+    }
+--- request
+GET /lua
+--- response_body
+ok
+--- shutdown_error_log eval
+[
+qr/exit_worker_by_lua:\d+: exit_worker/,
+qr/exiting now$/,
+]
diff --git a/t/162-exit-worker.t b/t/162-exit-worker.t
new file mode 100644
index 0000000000..cb0edf7076
--- /dev/null
+++ b/t/162-exit-worker.t
@@ -0,0 +1,195 @@
+# vim:set ft= ts=4 sw=4 et fdm=marker:
+
+use Test::Nginx::Socket::Lua;
+
+master_on();
+repeat_each(2);
+
+plan tests => repeat_each() * (blocks() * 2 + 8);
+
+#log_level("warn");
+no_long_string();
+our $HtmlDir = html_dir;
+
+run_tests();
+
+__DATA__
+
+=== TEST 1: simple exit_worker_by_lua_block
+--- http_config
+    exit_worker_by_lua_block {
+        ngx.log(ngx.NOTICE, "log from exit_worker_by_lua_block")
+    }
+--- config
+    location /t {
+        echo "ok";
+    }
+--- request
+GET /t
+--- response_body
+ok
+--- shutdown_error_log
+log from exit_worker_by_lua_block
+
+
+
+=== TEST 2: simple exit_worker_by_lua_file
+--- http_config
+    exit_worker_by_lua_file html/exit_worker.lua;
+--- config
+    location /t {
+        echo "ok";
+    }
+--- user_files
+>>> exit_worker.lua
+ngx.log(ngx.NOTICE, "log from exit_worker_by_lua_file")
+--- request
+GET /t
+--- response_body
+ok
+--- shutdown_error_log
+log from exit_worker_by_lua_file
+
+
+
+=== TEST 3: exit_worker_by_lua (require a global table)
+--- http_config eval
+    qq{lua_package_path '$::HtmlDir/?.lua;;';
+        exit_worker_by_lua_block {
+            foo = require("foo")
+            ngx.log(ngx.NOTICE, foo.bar)
+        }}
+--- config
+    location /t {
+        content_by_lua_block {
+            foo = require("foo")
+            foo.bar = "hello, world"
+            ngx.say("ok")
+        }
+    }
+--- user_files
+>>> foo.lua
+return {}
+--- request
+GET /t
+--- response_body
+ok
+--- shutdown_error_log
+hello, world
+
+
+
+=== TEST 4: exit_worker_by_lua single process ngx.timer not work
+--- http_config
+    exit_worker_by_lua_block {
+        local function bar()
+            ngx.log(ngx.ERR, "run the timer!"
+        end
+
+        local ok, err = ngx.timer.at(0, bar)
+        if not ok then
+            ngx.log(ngx.ERR, "failed to create timer: ", err)
+        else
+            ngx.log(ngx.NOTICE, "success")
+        end
+    }
+--- config
+    location /t {
+        echo "ok";
+    }
+--- request
+GET /t
+--- response_body
+ok
+--- no_error_log
+[error]
+
+
+
+=== TEST 5: exit_worker_by_lua use shdict
+--- http_config
+    lua_shared_dict dog 1m;
+    exit_worker_by_lua_block {
+        local dog = ngx.shared.dog
+        local val, err = dog:get("foo")
+        if not val then
+            ngx.log(ngx.ERR, "failed get shdict: ", err)
+        else
+            ngx.log(ngx.NOTICE, "get val: ", val)
+        end
+    }
+--- config
+    location /t {
+        content_by_lua_block {
+            local dog = ngx.shared.dog
+            dog:set("foo", 100)
+            ngx.say("ok")
+        }
+    }
+--- request
+GET /t
+--- response_body
+ok
+--- shutdown_error_log
+get val: 100
+
+
+
+=== TEST 6: skip in cache processes (with exit worker and privileged agent)
+--- http_config
+    lua_package_path "../lua-resty-core/lib/?.lua;../lua-resty-lrucache/lib/?.lua;;";
+
+    proxy_cache_path /tmp/cache levels=1:2 keys_zone=cache:1m;
+
+    init_by_lua_block {
+        assert(require "ngx.process".enable_privileged_agent())
+    }
+
+    exit_worker_by_lua_block {
+        local process = require "ngx.process"
+        ngx.log(ngx.INFO, "hello from exit worker by lua, process type: ", process.type())
+    }
+--- config
+    location = /t {
+        return 200;
+    }
+--- request
+    GET /t
+--- no_error_log
+[error]
+--- shutdown_error_log eval
+[
+qr/cache loader process \d+ exited/,
+qr/cache manager process \d+ exited/,
+qr/hello from exit worker by lua, process type: worker/,
+qr/hello from exit worker by lua, process type: privileged agent/,
+qr/privileged agent process \d+ exited/,
+]
+
+
+
+=== TEST 7: skipin cache processes (with init worker but without privileged agent)
+--- http_config
+    lua_package_path "../lua-resty-core/lib/?.lua;../lua-resty-lrucache/lib/?.lua;;";
+
+    proxy_cache_path /tmp/cache levels=1:2 keys_zone=cache:1m;
+
+    exit_worker_by_lua_block {
+        local process = require "ngx.process"
+        ngx.log(ngx.INFO, "hello from exit worker by lua, process type: ", process.type())
+    }
+--- config
+    location = /t {
+        return 200;
+    }
+--- request
+    GET /t
+--- no_error_log
+[error]
+start privileged agent process
+--- shutdown_error_log eval
+[
+qr/cache loader process \d+ exited/,
+qr/cache manager process \d+ exited/,
+qr/hello from exit worker by lua, process type: worker/,
+]
diff --git a/t/163-exit-worker-hup.t b/t/163-exit-worker-hup.t
new file mode 100644
index 0000000000..3f516aba98
--- /dev/null
+++ b/t/163-exit-worker-hup.t
@@ -0,0 +1,86 @@
+# vim:set ft= ts=4 sw=4 et fdm=marker:
+
+our $SkipReason;
+
+BEGIN {
+    if ($ENV{TEST_NGINX_CHECK_LEAK}) {
+        $SkipReason = "unavailable for the hup tests";
+
+    } else {
+        $ENV{TEST_NGINX_USE_HUP} = 1;
+        undef $ENV{TEST_NGINX_USE_STAP};
+    }
+}
+
+use Test::Nginx::Socket::Lua $SkipReason ? (skip_all => $SkipReason) : ();
+
+repeat_each(2);
+
+plan tests => repeat_each() * (blocks() * 2 + 2);
+
+no_long_string();
+
+worker_connections(1024);
+run_tests();
+
+__DATA__
+
+=== TEST 1: simple exit_worker_by_lua_block with hup
+--- http_config
+    exit_worker_by_lua_block {
+        ngx.log(ngx.NOTICE, "log from exit_worker_by_lua_block")
+    }
+--- config
+    location /t {
+        content_by_lua_block {
+            ngx.say("ok")
+        }
+    }
+--- request
+GET /t
+--- response_body
+ok
+--- shutdown_error_log
+log from exit_worker_by_lua_block
+
+
+
+=== TEST 2: exit after worker_shutdown_timeout
+--- main_config
+    worker_shutdown_timeout 1;
+--- http_config
+    exit_worker_by_lua_block {
+        ngx.log(ngx.NOTICE, "log from exit_worker_by_lua_block")
+    }
+
+    server {
+        listen 12345;
+
+        location = /t {
+            echo 'hello world';
+        }
+    }
+--- config
+    location /t {
+        content_by_lua_block {
+            ngx.timer.at(0, function ()
+                local sock = ngx.socket.tcp()
+                sock:connect("127.0.0.1", 12345)
+                local reader = sock:receiveuntil("unknow")
+                ngx.log(ngx.NOTICE, "reading to block the exiting")
+                reader()
+            end)
+
+            ngx.sleep(0)
+
+            ngx.say("ok")
+        }
+    }
+--- request
+GET /t
+--- response_body
+ok
+--- error_log
+reading to block the exiting
+--- shutdown_error_log
+log from exit_worker_by_lua_block