Horton

Drop slot's LWLock before returning from SaveSlotToPath()

Peter Eisentraut <peter@eisentraut.org>

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Commit: ce28a43ffa89b49584e75d6bb9f8ae03a8e13151
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2020-03-26T13:08:15Z
Releases: 9.5.22 
Drop slot's LWLock before returning from SaveSlotToPath()

When SaveSlotToPath() is called with elevel=LOG, the early exits didn't
release the slot's io_in_progress_lock.

This could result in a walsender being stuck on the lock forever.  A
possible way to get into this situation is if the offending code paths
are triggered in a low disk space situation.

Author: Pavan Deolasee <pavan.deolasee@2ndquadrant.com>
Reported-by: Craig Ringer <craig@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/56a138c5-de61-f553-7e8f-6789296de785%402ndquadrant.com

Files

PathChange+/−
src/backend/replication/slot.c modified +9 −0

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