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Fix error handling path in autovacuum launcher

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The original code (since 00e6a16d01) was assuming aborting the
transaction in autovacuum launcher was sufficient to release all
resources, but in reality the launcher runs quite a lot of code out of
any transactions.  Re-introduce individual cleanup calls to make abort
more robust.

Reported-by: Robert Haas
Discussion: https://postgr.es/m/CA+TgmobQVbz4K_+RSmiM9HeRKpy3vS5xnbkL95gSEnWijzprKQ@mail.gmail.com
This commit is contained in:
Alvaro Herrera 2017-08-15 13:35:12 -03:00
parent e139f1953f
commit d9a622cee1
1 changed files with 21 additions and 0 deletions
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21
src/backend/postmaster/autovacuum.c
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@ -91,6 +91,7 @@
#include "storage/proc.h"
#include "storage/procsignal.h"
#include "storage/sinvaladt.h"
#include "storage/smgr.h"
#include "tcop/tcopprot.h"
#include "utils/dsa.h"
#include "utils/fmgroids.h"
@ -524,6 +525,26 @@ AutoVacLauncherMain(int argc, char *argv[])
/* Abort the current transaction in order to recover */
AbortCurrentTransaction();
/*
* Release any other resources, for the case where we were not in a
* transaction.
*/
LWLockReleaseAll();
pgstat_report_wait_end();
AbortBufferIO();
UnlockBuffers();
if (CurrentResourceOwner)
{
ResourceOwnerRelease(CurrentResourceOwner,
RESOURCE_RELEASE_BEFORE_LOCKS,
false, true);
/* we needn't bother with the other ResourceOwnerRelease phases */
}
AtEOXact_Buffers(false);
AtEOXact_SMgr();
AtEOXact_Files();
AtEOXact_HashTables(false);
/*
* Now return to normal top-level context and clear ErrorContext for
* next time.