On Wed, Mar 15, 2017 at 12:27 AM, Anastasia Lubennikova
<lubennikov...@gmail.com> wrote:
> As far as I understand, in this thread were discussed two bugs of
> pg_stop_backup().
> Thanks to the clear descriptions above, I easily reproduced both of them.
>
> BUG#1:
> Server crashes on assertion on call of pg_stop_backup(false) after
> interrupted call of pg_stop_backup(false).
> TRAP: FailedAssertion("!(XLogCtl->Insert.nonExclusiveBackups > 0)", File:
> "xlog.c", Line: 10747)
>
> BUG#2:
> Failure to start an exclusive backup with the same name, if previous
> exclusive backup was stopped in another session.
>
> Both problems seem to be fixed with patch "backup-session-locks-fixes.patch".
> Speaking of the patch itself, I have a question: shouldn't we also update
> sessionBackupState
> in pg_stop_backup_callback() along with XLogCtl->Insert.exclusiveBackupState?No, that's not necessary. sessionBackupState is not changed until the code path where pg_stop_backup_callback() is active, and remains unchanged until it gets deactivated. > And couple of minor notes: > 1) + * Routines to starting stop, and get status of a base backup > Probably should be: + * Routines to start, stop and get status of a base > backup > And also this comment should be moved below the enum. > > 2) This is used in parallel of the shared memory status > s/ in parallel of/ in parallel with Agreed on both points. -- Michael
backup-session-locks-fixes-v2.patch
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