Our system has been running fine for months then twice in the last two days we have seen this problem. The status of the mailbox changes to 'stopped'. In both instances we see the error: mailboxd/JVM exited twice in 53 seconds (tolerance=60) in the log file. A quick restart of the service brings it back up and we continue on from there. I can not find any other errors associated with this happening. The syslog looks clean, zimbra logs are all clean, etc. Anyone ever seen something like this happen?