I'm trying to define a cronjob for a custom module, but having a hard time going through the proper flow of scheduled cronjobs.

Few things of note:

  • It seems that third-party cronjobs are only scheduled once, when the cache is flushed. When the scheduled ./bin/magento cron:run runs every minute, the first time the cache is flushed it picks up all of the third-party module cronjobs, and runs them on the next execution.
  • After the first run, it doesn't seem as though these third-party modules are scheduled for a second run, ever. Until the cache is flushed again.
    • Is this perhaps related to cron group? I noticed that items in the default cron group never get rescheduled, but it seems that items in the index cron group do (at least items from core code).
    • Disabling the cache doesn't help.
    • Even if cache is disabled, the third-party modules never get registered.
    • Even if cache is disabled, iff a ./bin/magento cache:flush is run, all of the items in the default group do get scheduled. This leads me to believe that either that cache is not getting properly disabled, there is a bug in the caching system, and/or there is some sort of intricacy with how the cache actually works.
  • What is the purpose of running php update/cron.php if we are already running ./bin/magento cron:run, and what is the difference between the two? I'm pulling info from devdocs http://devdocs.magento.com/guides/v2.0/config-guide/cli/config-cli-subcommands-cron.html#config-cli-cron-bkg

1 Answer 1


{partial answer}

update/cron.php is required for managing various components and system upgrade. A separate cron is required so that these actions can be performed from outside the Magento application, since such actions may cause an invalid state, such as incomplete updates and rollbacks.


  • 1
    The link posted only defines */1 * * * * php <your Magento install dir>/update/cron.php & */1 * * * * php <your Magento install dir>/bin/magento setup:cron:run & there is no mention of ./bin/magento cron:run. Is this also a bug? Dec 10, 2015 at 15:41
  • The link refers to the crons that are ONLY related to "component manager and system upgrade". So that is not a bug.
    – Maddy
    Dec 10, 2015 at 16:37

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