Scheduled jobs stopped working after an update last week - error in MailingEventUnsubscribe.php
I realized this morning that the CiviCRM cron job for the scheduled jobs stopped working after we updated last week from CiviCRM 5.61.2 to 5.61.4. Today I updated to the most current version 5.63.1 but the error still exists.
The problem became obvious as the message "Cron job not running" appeared when I logged in this morning (I did not so for the whole last week). When I checked the list of scheduled jobs I found out that the "Bounces fetcher" job run successfully but all the other jobs did not. So I run our cron job task
/var/www/civi_live/vendor/civicrm/cv/bin/cv api job.execute --user=admin --cwd=/var/www/civi_live/httpdocs
manually in CLI and got the following error:
In MailingEventUnsubscribe.php line 47:
count(): Argument #1 ($value) must be of type Countable|array, null given
The following file is the one: vendor/civicrm/civicrm-core/api/v3/MailingEventUnsubscribe.php
Here it is the following code part in the function civicrm_api3_mailing_event_unsubscribe_create:
$groups = CRM_Mailing_Event_BAO_MailingEventUnsubscribe::unsub_from_mailing($job, $queue, $hash);
if (count($groups)) {
CRM_Mailing_Event_BAO_MailingEventUnsubscribe::send_unsub_response($queue, $groups, FALSE, $job);
return civicrm_api3_create_success($params);
}
CRM_Mailing_Event_BAO_MailingEventUnsubscribe::unsub_from_mailing can return an array or NULL. I am not sure why this error appeared after the last update as neither CRM_Mailing_Event_BAO_MailingEventUnsubscribe::unsub_from_mailing nor civicrm_api3_mailing_event_unsubscribe_create() has changed but it may be related to some other changes somewhere.
When I change this code part to the following the scheduled jobs are finished:
$groups = CRM_Mailing_Event_BAO_MailingEventUnsubscribe::unsub_from_mailing($job, $queue, $hash);
if ($groups && count($groups)) {
CRM_Mailing_Event_BAO_MailingEventUnsubscribe::send_unsub_response($queue, $groups, FALSE, $job);
return civicrm_api3_create_success($params);
}