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Commit59d1e2b

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Cancel CV sleep during subtransaction abort.
Generally, error recovery paths that need to do things likeLWLockReleaseAll and pgstat_report_wait_end also need to callConditionVariableCancelSleep, but AbortSubTransaction was missed.Since subtransaction abort might destroy up the DSM segment thatcontains the ConditionVariable stored in cv_sleep_target, thiscan result in a crash for anything using condition variables.Reported and diagnosed by Andres Freund.Discussion:http://postgr.es/m/20171221110048.rxk6464azzl5t2fi@alap3.anarazel.de
1 parent1804284 commit59d1e2b

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  • src/backend/access/transam

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‎src/backend/access/transam/xact.c

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@@ -4717,6 +4717,9 @@ AbortSubTransaction(void)
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/* Reset WAL record construction state */
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XLogResetInsertion();
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/* Cancel condition variable sleep */
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ConditionVariableCancelSleep();
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/*
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* Also clean up any open wait for lock, since the lock manager will choke
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* if we try to wait for another lock before doing this.

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