PM2 crash on stopping app or reboot while watching (Cannot read property 'on' of undefined /pm2/lib/TreeKill.js))

[evaisse]

Expected behaviour

App should be reloading every time I trigger pm2 stop, pm2 start -f or modify the files using --watch option. But instead each time pm2 try to manage the process, pm2 die with PM2 global error caught.

It get stuck when calling for a stoping command like pm2 stop app. Calling the command a second time seems to get the job done.

<evaisse:~/> pm2 start server.js
[PM2] Starting /server.js in fork_mode (1 instance)
[PM2] Done.
┌──────────┬────┬──────┬───────┬────────┬─────────┬────────┬─────┬───────────┬──────────┐
│ App name │ id │ mode │ pid   │ status │ restart │ uptime │ cpu │ mem       │ watching │
├──────────┼────┼──────┼───────┼────────┼─────────┼────────┼─────┼───────────┼──────────┤
│ server   │ 0  │ fork │ 72050 │ online │ 0       │ 0s     │ 0%  │ 15.5 MB   │ disabled │
└──────────┴────┴──────┴───────┴────────┴─────────┴────────┴─────┴───────────┴──────────┘
 Use `pm2 show <id|name>` to get more details about an app

<evaisse:~/> pm2 stop server
[PM2] Applying action stopProcessId on app [server](ids: 0)
^C

<evaisse:~/> pm2 stop server
[PM2] Spawning PM2 daemon with pm2_home=/Users/evaisse/.pm2
[PM2] PM2 Successfully daemonized
[PM2][ERROR] Process server not found
┌──────────┬────┬──────┬─────┬────────┬─────────┬────────┬─────┬─────┬──────────┐
│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │
└──────────┴────┴──────┴─────┴────────┴─────────┴────────┴─────┴─────┴──────────┘
 Use `pm2 show <id|name>` to get more details about an app

Actual behaviour

PM2 crash every time with no logs

Steps to reproduce

pm2 start app.js
pm2 stop app.js

or

pm2 start app.js --watch

Software versions used

OS         : Mac OS x 10.12.02
node.js    : 6.9.
PM2        : 2.2.3

PM2 Log output

Use the command: tail --lines 50 ~/.pm2/pm2.log

<evaisse:~/Sites/web-es-streaming-01> tail -n 50 ~/.pm2/pm2.log
2017-01-19 17:17:40: Time                 : Thu Jan 19 2017 17:17:40 GMT+0100 (CET)
2017-01-19 17:17:40: PM2 version          : 2.2.3
2017-01-19 17:17:40: Node.js version      : 6.9.4
2017-01-19 17:17:40: Current arch         : x64
2017-01-19 17:17:40: PM2 home             : /Users/evaisse/.pm2
2017-01-19 17:17:40: PM2 PID file         : /Users/evaisse/.pm2/pm2.pid
2017-01-19 17:17:40: RPC socket file      : /Users/evaisse/.pm2/rpc.sock
2017-01-19 17:17:40: BUS socket file      : /Users/evaisse/.pm2/pub.sock
2017-01-19 17:17:40: Application log path : /Users/evaisse/.pm2/logs
2017-01-19 17:17:40: Process dump file    : /Users/evaisse/.pm2/dump.pm2
2017-01-19 17:17:40: Concurrent actions   : 2
2017-01-19 17:17:40: SIGTERM timeout      : 1600
2017-01-19 17:17:40: ===============================================================================
2017-01-19 17:17:53: [Watch] Start watching 0
2017-01-19 17:17:53: Starting execution sequence in -fork mode- for app name:server id:0
2017-01-19 17:17:53: App name:server id:0 online
2017-01-19 17:17:55: [Watch] Stop watching 0
2017-01-19 17:17:55: Stopping app:server id:0
2017-01-19 17:17:57: ===============================================================================
2017-01-19 17:17:57: --- PM2 global error caught ---------------------------------------------------
2017-01-19 17:17:57: Time                 : Thu Jan 19 2017 17:17:57 GMT+0100 (CET)
2017-01-19 17:17:57: Cannot read property 'on' of undefined
2017-01-19 17:17:57: TypeError: Cannot read property 'on' of undefined
    at buildProcessTree (/usr/local/lib/node_modules/pm2/lib/TreeKill.js:86:14)
    at /usr/local/lib/node_modules/pm2/lib/TreeKill.js:107:11
    at Array.forEach (native)
    at ChildProcess.onClose (/usr/local/lib/node_modules/pm2/lib/TreeKill.js:102:31)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:877:16)
    at Socket.<anonymous> (internal/child_process.js:334:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
2017-01-19 17:17:57: ===============================================================================
2017-01-19 17:17:57: [PM2][%s] Resurrecting PM2
/usr/local/lib/node_modules/pm2/lib/TreeKill.js:86
    ps.stdout.on('data', function (data) {
             ^

TypeError: Cannot read property 'on' of undefined
    at buildProcessTree (/usr/local/lib/node_modules/pm2/lib/TreeKill.js:86:14)
    at /usr/local/lib/node_modules/pm2/lib/TreeKill.js:107:11
    at Array.forEach (native)
    at ChildProcess.onClose (/usr/local/lib/node_modules/pm2/lib/TreeKill.js:102:31)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:877:16)
    at Socket.<anonymous> (internal/child_process.js:334:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)

[vmarchaud]

Landed in pm2 2.3.0

[evaisse]

Great ! Thanks !