fix: pcall(box.ctl.wait_rw) and logs spam in backround fibers

xqueue.lua

@@ -821,7 +821,7 @@ function M.upgrade(space,opts,depth)
 				log.verbose("awaiting rw")
 				repeat
 					if box.ctl.wait_rw then
-						box.ctl.wait_rw(1)
+						pcall(box.ctl.wait_rw, 1)
 					else
 						fiber.sleep(0.001)
 					end
@@ -849,11 +849,7 @@ function M.upgrade(space,opts,depth)
 				repeat fiber.sleep(0.001) until space.xq
 				if xq.ready then xq.ready:get() end
 				log.info("I am worker %s",i)
-				if box.info.ro then
-					log.info("Shutting down on ro instance")
-					return
-				end
-				while box.space[space.name] and space.xq == xq do
+				while box.space[space.name] and space.xq == xq and not box.info.ro do
 					if xq.ready then xq.ready:get() end
 					local task = space:take(1)
 					if task then
@@ -873,6 +869,10 @@ function M.upgrade(space,opts,depth)
 					end
 					fiber.yield()
 				end
+				if box.info.ro then
+					log.info("Shutting down on ro instance")
+					return
+				end
 				log.info("worker %s ended", i)
 			end,space,self)
 		end
@@ -888,14 +888,10 @@ function M.upgrade(space,opts,depth)
 			if xq.ready then xq.ready:get() end
 			local chan = xq.runat_chan
 			log.info("Runat started")
-			if box.info.ro then
-				log.info("Shutting down on ro instance")
-				return
-			end
 			local maxrun = 1000
 			local curwait
 			local collect = {}
-			while box.space[space.name] and space.xq == xq do
+			while box.space[space.name] and space.xq == xq and not box.info.ro do
 				local r,e = pcall(function()
 					-- print("runat loop 2 ",box.time64())
 					local remaining
@@ -972,6 +968,10 @@ function M.upgrade(space,opts,depth)
 				if curwait == 0 then fiber.sleep(0) end
 				chan:get(curwait)
 			end
+			if box.info.ro then
+				log.info("Shutting down on ro instance")
+				return
+			end
 			log.info("Runat ended")
 		end,space,self,runat_index)
 	end