Scheduled Backups aborting with unexpected error (642)
Operating system version
OS X 10.6.7
Description of the issue
Our scheduled daily backup has aborted on three of the past seven days, each time noting "unexpected errors." This seemed to start just after we updated to 22.214.171.1249. Security updates were also applied to OS X this time, but otherwise I can't think of any particular changes to the Server environment.
This schedule task is set up to back up all databases to a local folder. Both "Verify backup integrity" and "Clone the backup file" are enabled. This is our only scheduled task. Until a week ago, it has been running for a couple years without any problems. There have been no changes to the task.
In the folders of the failed backups, most files show a file size of 12kb, while a few have more realistic file sizes (our largest database is under 50mb). In each case, the same files seem to get backed up successfully before the backup fails. There are no files at all in the Clones folder.
All of the files passed a consistency check.
Steps to reproduce the problem
Unknown. On some days, the backup succeeds. On other days, it fails. In our case, it has failed as follows:
June 3: Fail
June 4: Fail
June 5: Success
June 6: Success
June 7: Success
June 8: Fail
The scheduled backup should succeed every time it runs.
Sometimes the scheduled backup fails.
Exact text of any error message(s) that appear
Each time the schedule is aborted, I find the following messages in the server logs:
Server Events Error 729
Backup aborted by user or due to error; some incomplete files may be left in destination. (20410)
Server Events Error 642
Schedule "Daily Database Backup" aborted; unexpected error. (20410)