PM2 global error caught - Something went wrong. cron reached maximum iterations

[mararrdeveloper]

By time to time, PM2 crashes apparently because of a crash on the cron module. It looks like that the github page of the node-cron module is plenty of complaints about this error (https://github.com/kelektiv/node-cron/issues?page=2&q=cron+reached+maximum+iterations) but no fixes have been provided. Is it time to change the dependency to something else?

Here the error:

--- PM2 global error caught ---------------------------------------------------
Time                 : Wed Sep 22 2021 18:00:23 GMT+0000 (Coordinated Universal Time)
Something went wrong. cron reached maximum iterations.
#011#011#011#011#011#011Please open an  issue (https://github.com/kelektiv/node-cron/issues/new) and provide the following string
 #011#011#011#011#011#011Time Zone: "" - Cron String: 0 0 0,3,6,9,12,15,18,21 * * * - UTC offset: +00:00 - current Date: Wed Sep 22 2021 18:00:14 GMT+0000
Error: Something went wrong. cron reached maximum iterations.
#011#011#011#011#011#011Please open an  issue (https://github.com/kelektiv/node-cron/issues/new) and provide the following string
#011#011#011#011#011#011Time Zone: "" - Cron String: 0 0 0,3,6,9,12,15,18,21 * * * - UTC offset: +00:00 - current Date: Wed Sep 22 2021 18:00:14 GMT+0000
    at CronTime._getNextDateFrom (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/node_modules/cron/lib/cron.js:235:12)
    at CronTime.sendAt (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/node_modules/cron/lib/cron.js:156:17)
    at CronTime.getTimeout (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/node_modules/cron/lib/cron.js:175:29)
    at CronJob.start (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/node_modules/cron/lib/cron.js:613:31)
    at Timeout.callbackWrapper [as _onTimeout] (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/node_modules/cron/lib/cron.js:665:29)
    at listOnTimeout (internal/timers.js:557:17)
    at processTimers (internal/timers.js:500:7)

Here the configuration of pm2:

module.exports = {
  apps: [
    {
      name: 'app1',
      script: 'Queues/app1.js',
      instances: 1,
      exec_mode: 'fork',
      //Every 30 minutes
      cron_restart: '*/30 * * * *',
      watch: false,
      autorestart: false
    },

    {
      name: 'app2',
      script: 'Queues/app2.js',
      instances: 1,
      exec_mode: 'fork',
      //Every 3 hours (minute 0)
      cron_restart: '0 */3 * * *',
      watch: false,
      autorestart: false
    },

    {
      name: 'app3',
      script: 'Queues/app3.js',
      instances: 1,
      exec_mode: 'fork',
      //At 3.00
      cron_restart: '0 3 * * *',
      watch: false,
      autorestart: false
    },

    {
      name: 'app4',
      script: 'Queues/app4.js',
      instances: 1,
      exec_mode: 'fork',
      watch: false,
      autorestart: true,
      restart_delay: 10 * 60 * 1000, //10 minutes
      kill_timeout: 5 * 60 * 1000 //5 minutes to kill the the process
    },

    {
      name: 'app5',
      script: 'Queues/app5.js',
      instances: 1,
      exec_mode: 'fork',
      //Every 3 hours (minute 15)
      cron_restart: '15 */3 * * *',
      watch: false,
      autorestart: false,
      kill_timeout: 5 * 60 * 1000 //5 minutes to kill the the process
    },

    {
      name: 'app6',
      script: 'Queues/app6.js',
      instances: 1,
      exec_mode: 'fork',
      watch: false,
      autorestart: false,
      kill_timeout: 5 * 60 * 1000, //5 minutes to kill the the process
      //At 3.15
      cron_restart: '15 3 * * *'
    }
  ]
}

Here the pm2 report

--- PM2 report ----------------------------------------------------------------
Date                 : Fri Sep 24 2021 19:55:26 GMT+0000 (Coordinated Universal Time)
===============================================================================
--- Daemon -------------------------------------------------
/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/lib/API/Extra.js:113
      fmt.field('pm2d version', report.pm2_version);
                                       ^

TypeError: Cannot read property 'pm2_version' of undefined
    at /opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/lib/API/Extra.js:113:40
    at /opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/lib/Client.js:531:18
    at /opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/lib/Client.js:107:21
    at ChildProcess.onError (/opt/elasticbeanstalk/node-install/node-v14.17.5-linux-x64/lib/node_modules/pm2/lib/Client.js:269:17)
    at Object.onceWrapper (events.js:520:26)
    at ChildProcess.emit (events.js:400:28)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
    at onErrorNT (internal/child_process.js:467:16)
    at processTicksAndRejections (internal/process/task_queues.js:82:21)
    at runNextTicks (internal/process/task_queues.js:64:3)

[Hexagon]

The cron library is more or less broken and abandoned. I would suggest you to have a look at github.com/hexagon/croner. Pay special attention to the section "Why another JavaScript cron implementation?"

[Unitech]

Published on 5.2.0

npm install pm2@latest -g
pm2 update