From: Fujii Masao Date: Wed, 7 Aug 2013 17:48:53 +0000 (+0900) Subject: Fix assertion failure by an immediate shutdown. X-Git-Tag: REL9_4_BETA1~1237 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=91c3613d3748d881706c3e60d8221ea92833ac1a;p=postgresql 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 machine transition to PM_WAIT_DEAD_END state even if checkpointer process is still running, and which caused assertion failure. This bug was introduced in commit 457d6cf049c57cabe9b46ea13f26138040a214ec. This patch ensures that postmaster's state machine doesn't transition to PM_WAIT_DEAD_END state in an immediate shutdown while checkpointer process is running. --- diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index e6d750d4d3..5a816a2d3a 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -3328,19 +3328,21 @@ PostmasterStateMachine(void) * PM_WAIT_BACKENDS state ends when we have no regular backends * (including autovac workers), no bgworkers (including unconnected * ones), and no walwriter, autovac launcher or bgwriter. If we are - * doing crash recovery then we expect the checkpointer to exit as - * well, otherwise not. The archiver, stats, and syslogger processes - * are disregarded since they are not connected to shared memory; we - * also disregard dead_end children here. Walsenders are also - * disregarded, they will be terminated later after writing the - * checkpoint record, like the archiver process. + * doing crash recovery or an immediate shutdown then we expect + * the checkpointer to exit as well, otherwise not. The archiver, + * stats, and syslogger processes are disregarded since + * they are not connected to shared memory; we also disregard + * dead_end children here. Walsenders are also disregarded, + * they will be terminated later after writing the checkpoint record, + * like the archiver process. */ if (CountChildren(BACKEND_TYPE_NORMAL | BACKEND_TYPE_WORKER) == 0 && CountUnconnectedWorkers() == 0 && StartupPID == 0 && WalReceiverPID == 0 && BgWriterPID == 0 && - (CheckpointerPID == 0 || !FatalError) && + (CheckpointerPID == 0 || + (!FatalError && Shutdown < ImmediateShutdown)) && WalWriterPID == 0 && AutoVacPID == 0) {