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Commitd9b3bc5

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Add HOLD_INTERRUPTS section into FinishPreparedTransaction.
If an interrupt arrives in the middle of FinishPreparedTransactionand any callback decide to call CHECK_FOR_INTERRUPTS (e.g.RemoveTwoPhaseFile can write a warning with ereport, which checks forinterrupts) then it's possible to leave current GXact undeleted.Backpatch to all supported branchesStas KelvichDiscussion: ihttps://www.postgresql.org/message-id/3AD85097-A3F3-4EBA-99BD-C38EDF8D2949@postgrespro.ru
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‎src/backend/access/transam/twophase.c

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@@ -1377,6 +1377,9 @@ FinishPreparedTransaction(const char *gid, bool isCommit)
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/* compute latestXid among all children */
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latestXid=TransactionIdLatest(xid,hdr->nsubxacts,children);
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/* Prevent cancel/die interrupt while cleaning up */
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HOLD_INTERRUPTS();
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/*
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* The order of operations here is critical: make the XLOG entry for
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* commit or abort, then mark the transaction committed or aborted in
@@ -1465,6 +1468,8 @@ FinishPreparedTransaction(const char *gid, bool isCommit)
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RemoveGXact(gxact);
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MyLockedGxact=NULL;
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RESUME_INTERRUPTS();
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pfree(buf);
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}
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