woz woz - 5 months ago 63
Node.js Question

pm2 --ignore-watch not working

I have been using pm2 for some time now. Recently, I needed to add a custom log directory to my Express4 project called "actionLog". Since it is a directory that gets updated with log files and I don't want pm2 to restart the app on log file changes, I wanted pm2 to ignore watching that directory. After updating pm2 to latest, here is the command I used:

pm2 start app.js --watch --ignore-watch="actionLog"


I get the following error streaming through the pm2 logs:

PM2 Error: watch ENOSPC
PM2 at exports._errnoException (util.js:746:11)
PM2 at FSWatcher.start (fs.js:1172:11)
PM2 at Object.fs.watch (fs.js:1198:11)
PM2 at createFsWatchInstance (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:37:15)
PM2 at setFsWatchListener (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:80:15)
PM2 at EventEmitter.NodeFsHandler._watchWithNodeFs (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:228:14)
PM2 at EventEmitter.NodeFsHandler._handleFile (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:255:21)
PM2 at EventEmitter.<anonymous> (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:468:21)
PM2 at FSReqWrap.oncomplete (fs.js:95:15)
PM2 Error: watch ENOSPC
PM2 at exports._errnoException (util.js:746:11)
PM2 at FSWatcher.start (fs.js:1172:11)
PM2 at Object.fs.watch (fs.js:1198:11)
PM2 at createFsWatchInstance (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:37:15)
PM2 at setFsWatchListener (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:80:15)
PM2 at EventEmitter.NodeFsHandler._watchWithNodeFs (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:228:14)
PM2 at EventEmitter.NodeFsHandler._handleFile (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:255:21)
PM2 at EventEmitter.<anonymous> (/usr/local/lib/node_modules/pm2/node_modules/chokidar/lib/nodefs-handler.js:468:21)
PM2 at FSReqWrap.oncomplete (fs.js:95:15)
PM2 Error: watch ENOSPC


I have also tried using the command:

pm2 start bin/www --watch --ignore-watch="actionLog"


This also generated the same error.

Once I have the correct ignore-watch parameter, I will update the json config file I use for starting pm2. At the moment, using this config file with the ignore-watch is also causing errors, but instead of a detailed stack trace as above, I only see the following in the pm2 logs:

PM2: 2016-02-23 04:05:34: Starting execution sequence in -fork mode- for app name:aadm id:2
PM2: 2016-02-23 04:05:34: App name:aadm id:2 online
PM2: 2016-02-23 04:05:35: Change detected on path actionLog/userAction.log for app aadm - restarting
PM2: 2016-02-23 04:05:35: Stopping app:aadm id:2
PM2: 2016-02-23 04:05:35: App name:aadm id:2 exited with code SIGTERM
PM2: 2016-02-23 04:05:35: Process with pid 5102 killed
PM2: 2016-02-23 04:05:35: Starting execution sequence in -fork mode- for app name:aadm id:2
PM2: 2016-02-23 04:05:35: App name:aadm id:2 online


I have looked at some of the reports of ignore-watch problems such as:



Unfortunately, I am still stuck. Any ideas?

woz woz
Answer

Turns out even though the errors were triggered by ignore-watch, they were not caused by it. The following command fixed the issue:

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

I found this solution here: http://stackoverflow.com/a/32600959/2234029

I also tried "npm dedupe" -as suggested on that thread- which didn't help.

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