Scheduler cannot write PID file. Please check permissions on cache/modules/Schedulers/lastrun

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1

I’ve been running 7.1.x for quite some time. Today I upgraded production to 7.7.2, and moved from Bitnami on AWS to a VPS/CPanel on InMotionHosting. I’m getting the following error in the logs:

Scheduler cannot write PID file.  Please check permissions on cache/modules/Schedulers/lastrun

The permissions on said file are 644. Everytime I change them it fails. I’m wondering if it is something about the logged in user that the cron job is running under? Or possibly this in config.ini:

  array (
    'dir_mode' => 1533,
    'file_mode' => 493,
    'user' => '',
    'group' => '',
  ),

Another idea I have is that it might be a problem with the owner/group of the files. I did not change to www-data:www-data, as directed… the default owner/group for files on the server already were a numeric 507:507, and these are the same.

So those are my three ideas, but I don’t know where to go from here. Please suggest/assist.

Another 2 peices of information…

  1. I noticed that my popup and loading messages just say undefined. I ran across some code that suggested those might access the cache directory as well??? Not sure if this is related.
  2. In Process Workflow, it does look like the cron job is successfully running, and shows the last run time accurately.

Sincerely,
sieberta

2

I think I have a solution. The file was owned by root:[usergroup]… I think because, when I was having problems with the cron job, I ran cron.php from the shell. I changed the ownership to [user]:[usergroup] and the permissions to 775… and no more error!