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Commitc1669fd

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Fix instance of elog() called while holding a spinlock
This broke the project rule to not call any complex code while aspinlock is held. Issue introduced byb89e151.Discussion:https://postgr.es/m/20200602.161518.1399689010416646074.horikyota.ntt@gmail.comBackpatch-through: 9.5
1 parentf88bd31 commitc1669fd

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+16
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1 file changed

+16
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‎src/backend/replication/logical/logical.c‎

Lines changed: 16 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -972,25 +972,33 @@ LogicalIncreaseRestartDecodingForSlot(XLogRecPtr current_lsn, XLogRecPtr restart
972972
{
973973
slot->candidate_restart_valid=current_lsn;
974974
slot->candidate_restart_lsn=restart_lsn;
975+
SpinLockRelease(&slot->mutex);
975976

976977
elog(DEBUG1,"got new restart lsn %X/%X at %X/%X",
977978
(uint32) (restart_lsn >>32), (uint32)restart_lsn,
978979
(uint32) (current_lsn >>32), (uint32)current_lsn);
979980
}
980981
else
981982
{
983+
XLogRecPtrcandidate_restart_lsn;
984+
XLogRecPtrcandidate_restart_valid;
985+
XLogRecPtrconfirmed_flush;
986+
987+
candidate_restart_lsn=slot->candidate_restart_lsn;
988+
candidate_restart_valid=slot->candidate_restart_valid;
989+
confirmed_flush=slot->data.confirmed_flush;
990+
SpinLockRelease(&slot->mutex);
991+
982992
elog(DEBUG1,"failed to increase restart lsn: proposed %X/%X, after %X/%X, current candidate %X/%X, current after %X/%X, flushed up to %X/%X",
983993
(uint32) (restart_lsn >>32), (uint32)restart_lsn,
984994
(uint32) (current_lsn >>32), (uint32)current_lsn,
985-
(uint32) (slot->candidate_restart_lsn >>32),
986-
(uint32)slot->candidate_restart_lsn,
987-
(uint32) (slot->candidate_restart_valid >>32),
988-
(uint32)slot->candidate_restart_valid,
989-
(uint32) (slot->data.confirmed_flush >>32),
990-
(uint32)slot->data.confirmed_flush
991-
);
995+
(uint32) (candidate_restart_lsn >>32),
996+
(uint32)candidate_restart_lsn,
997+
(uint32) (candidate_restart_valid >>32),
998+
(uint32)candidate_restart_valid,
999+
(uint32) (confirmed_flush >>32),
1000+
(uint32)confirmed_flush);
9921001
}
993-
SpinLockRelease(&slot->mutex);
9941002

9951003
/* candidates are already valid with the current flush position, apply */
9961004
if (updated_lsn)

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