Our Confluence setup was stable during the first few weeks but maybe a month ago it started to crash. At first it was once per week but now it is every second day. According to the logs, there are some job runners missing but I don't know whether they can cause confluence to crash. These include (not necessarily complete):
Last 2,000 lines of log (includes restart of confluence): https://pastebin.com/ndzveErR
The crash occurred between 00:16:06,201 (last log entrance) and 9:50 (someone messaged me that confluence is not reachable)
Given the regularity of the log entrances I guess that 00:16:06,201 or some error in its vicinity was responsible for the crash.
Thanks for the log and detailed description.
My theory is that you may have migrated from Cloud, and the automatic backup job was migrated from Cloud but is not compatible with the server instance. The automatic backup was the last job to fail before the restart:
2017-09-19 00:16:06,201 ERROR [Caesium-1-1] [scheduler.caesium.impl.CaesiumSchedulerService] executeClusteredJobWithRecoveryGuard Unhandled exception during the attempt to execute job 'amq-ProgressAwareTaskService:com.atlassian.ondemand.backupmanager.longrunning.SiteExportTaskRunner9118ced6-123a-4d02-ac92-677382efe6c8'; will attempt recovery in 60 seconds
I look forward to hearing how it goes.
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