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Commit91c3613

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Fix assertion failure by an immediate shutdown.
In PM_WAIT_DEAD_END state, checkpointer process must be dead already.But an immediate shutdown could make postmaster's state machinetransition to PM_WAIT_DEAD_END state even if checkpointer process isstill running, and which caused assertion failure. This bug was introducedin commit457d6cf.This patch ensures that postmaster's state machine doesn't transition toPM_WAIT_DEAD_END state in an immediate shutdown while checkpointerprocess is running.
1 parentf347f26 commit91c3613

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‎src/backend/postmaster/postmaster.c‎

Lines changed: 9 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -3328,19 +3328,21 @@ PostmasterStateMachine(void)
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* PM_WAIT_BACKENDS state ends when we have no regular backends
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* (including autovac workers), no bgworkers (including unconnected
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* ones), and no walwriter, autovac launcher or bgwriter. If we are
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* doing crash recovery then we expect the checkpointer to exit as
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* well, otherwise not. The archiver, stats, and syslogger processes
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* are disregarded since they are not connected to shared memory; we
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* also disregard dead_end children here. Walsenders are also
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* disregarded, they will be terminated later after writing the
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* checkpoint record, like the archiver process.
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* doing crash recovery or an immediate shutdown then we expect
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* the checkpointer to exit as well, otherwise not. The archiver,
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* stats, and syslogger processes are disregarded since
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* they are not connected to shared memory; we also disregard
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* dead_end children here. Walsenders are also disregarded,
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* they will be terminated later after writing the checkpoint record,
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* like the archiver process.
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*/
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if (CountChildren(BACKEND_TYPE_NORMAL |BACKEND_TYPE_WORKER)==0&&
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CountUnconnectedWorkers()==0&&
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StartupPID==0&&
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WalReceiverPID==0&&
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BgWriterPID==0&&
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(CheckpointerPID==0|| !FatalError)&&
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(CheckpointerPID==0||
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(!FatalError&&Shutdown<ImmediateShutdown))&&
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WalWriterPID==0&&
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AutoVacPID==0)
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{

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