I have an installation on 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
This is the last entry that I see in the log file:
INFO 2016-02-24 00:05:00,004 (com.serotonin.m2m2.rt.maint.work.DatabaseBackupWorkItem.execute:94) - Starting database backup WorkItem.
INFO 2016-02-24 00:05:00,005 (com.serotonin.m2m2.rt.maint.work.DatabaseBackupWorkItem.createLogOutputStream:179) - Writing upgrade log to /opt/mango/logs/com.serotonin.m2m2.rt.maint.work.DatabaseBackupWorkItem.log
INFO 2016-02-24 00:05:02,631 (com.serotonin.m2m2.rt.maint.work.BackupWorkItem.execute:102) - Starting backup WorkItem.
About 6 hours hereafter I noticed that it is down. How can I debug further what happened, before I start it again? I has run fine for the past 6 months.