Issue Summary

LDAP directories defined in Confluence Administration » User Directories stops auto-syncing on the synchronisation interval.

Environment

• Confluence connected to an LDAP directory with a sync interval of 2 minutes

Steps to Reproduce / Diagnose:

1. Install Confluence
2. Connect Confluence to an LDAP directory with a sync interval of 2 minutes
3. Enable the following DEBUG

   com.atlassian.confluence.importexport
   com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService
   

4. Watching atlassian-confluence.log, it will sync with LDAP every 2 minutes
5. Drop the XML Space import zip into the Restore Directory
6. Through Confluence Administration, perform the Space Import and immediately close the Administration page as soon as you press Restore

(this is just a sample reproducible scenario)

Expected Results

1. We see in the logs that Confluence does unschedule the LDAP job but once the Space import is complete, it should re-enable the LDAP scheduled job

Actual Results

1. We see this in the log when the LDAP job is unscheduled

   2019-11-20 12:30:43,929 DEBUG [Long running task: Importing data] [scheduler.caesium.impl.CaesiumSchedulerService] unscheduleJob unscheduleJob: com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerManager.1015809
   

2. It never gets added back in by Confluence even and hence, the LDAP job no longer syncs on the configured sync interval

Workaround

• Restart Confluence to reset the LDAP job

If Confluence is running as Data Center, shutdown all nodes, then start up each node, one at a time