"Michael Beckstette" <mbeckste(at)TechFak(dot)Uni-Bielefeld(dot)DE> writes:
> from time to time my postmaster crashes with the below mentioned errormessage.
> DEBUG: MoveOfflineLogs: remove 0000000D000000A3
> FATAL 2: MoveOfflineLogs: cannot read xlog dir: Invalid argument
Hmm. I cannot see a reason for the xlog directory to be unreadable,
especially not if it's readable most of the time.
The code that is reporting this failure is in MoveOfflineLogs() in
src/backend/access/transam/xlog.c. You could maybe add some
additional debug logging there to try to understand what is going wrong
... but I sure don't see any reason for readdir() to fail, especially
not if it's succeeded on previous calls --- and your log indicates it's
succeeded at least once.
Are you perhaps running Postgres over an NFS mount? That's widely
regards, tom lane
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