UnhandledRejection error when trying to use metals

[MakonnenMak]

Hey all. Recently switched computers and followed the same exact readme to install metals again, but I'm running into some issues.

Installed Coc using Vim-Plug
Plug 'neoclide/coc.nvim', {'branch': 'release'}

Using Nvim and installed metals using
:CocInstall coc-metals

CocConfig

 {
           "metals.javaHome": "/usr/bin/java"
 }

CocInfo output

## versions                                                                                    
vim version: NVIM v0.4.4                                                                       
node version: v16.2.0                                                                         
coc.nvim version: 0.0.80-825a54d780                                                              
coc.nvim directory: /home/makonnen/.vim/plugged/coc.nvim                                          
term: xterm-kitty                                                                                 
platform: linux 
                                                                                 
## Log of coc.nvim                                                                              
2021-05-31T18:43:55.074 INFO (pid:6696) [plugin] - coc.nvim 0.0.80-825a54d780 initialized with nod│~
2021-05-31T18:44:00.911 INFO (pid:6696) [attach] - receive notification: installExtensions []     │~
2021-05-31T18:44:04.122 INFO (pid:6696) [attach] - receive notification: showInfo []

When opening a .scala file I get this error message

[coc.nvim]: UnhandledRejection: spawn ENOTDIR
Error: spawn ENOTDIR
    at ChildProcess.spawn (node:internal/child_process:415:11)
    at Object.spawn (node:child_process:609:9)
    at Object.spawn (/home/makonnen/.config/coc/extensions/node_modules/coc-metals/node_modules/promisif
y-child-process/index.cjs:134:46)
    at Object.fetchMetals (/home/makonnen/.config/coc/extensions/node_modules/coc-metals/node_modules/me
tals-languageclient/lib/fetchMetals.js:7:38)
    at k (/home/makonnen/.config/coc/extensions/node_modules/coc-metals/lib/index.js:28:2623)
    at /home/makonnen/.config/coc/extensions/node_modules/coc-metals/lib/index.js:28:1666
    at processTicksAndRejections (node:internal/process/task_queues:96:5)

Ran into this before, but rerunning the installation fixed it for me from this thread. That's not working right now so was curious if anyone had any clues as to why this is happening or some good starting points to resolving the issue.

[ckipp01]

Thanks for the report @MakonnenMak. This one has been tricky in the past and I haven't been able to figure out what's actually going on. However looking closely it almost seems like it's trying to install with a path that doesn't exists. Are you able to try to manually set your metals.javaHome in your :CocConfig and try that? It will look something like this:

  "metals.javaHome": "/Users/ckipp/.sdkman/candidates/java/21.0.0.2.r11-grl",

[MakonnenMak]

Should've mentioned in my post (will update), but yeah I have that key set in the settings.

 {
           "metals.javaHome": "/usr/bin/java"
 }

Path confirmed via

$ which java                                              [22:11:11]
/usr/bin/java

[MakonnenMak]

Completely forgot which java returns the symlink not the actual path.
Updating it to /usr/lib/jvm/java-15-openjdk fixes the error.

Ran
dirname $(dirname $(readlink -f $(which javac))) to find the actual path just in case someone runs into this again.

Thanks for pointing out the issue @ckipp01 !