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Fix walsender handling of postmaster shutdown, to not go into endless loop.

This bug was introduced by my patch to use the regular die/quickdie signalhandlers in walsender processes. I tried to make walsender exit at nextCHECK_FOR_INTERRUPTS() by setting ProcDiePending, but that's not enough, youneed to set InterruptPending too. On second thoght, it was not a very goodway to make walsender exit anyway, so use proc_exit(0) instead.Also, send a CommandComplete message before exiting; that's what we didbefore, and you get a nicer error message in the standby that way.Reported by Thom Brown.

1 parent95d035e commit9c0e2b9Copy full SHA for 9c0e2b9

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src/backend/replication
- walsender.c

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`‎src/backend/replication/walsender.c‎`

Lines changed: 5 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -711,8 +711,11 @@ WalSndLoop(void)`
`711`	`711`	`XLogSend(output_message,&caughtup);`
`712`	`712`	`if (caughtup&& !pq_is_send_pending())`
`713`	`713`	`{`
`714`		`-ProcDiePending= true;`
`715`		`-continue;/* don't want to wait more */`
	`714`	`+/* Inform the standby that XLOG streaming is done */`
	`715`	`+pq_puttextmessage('C',"COPY 0");`
	`716`	`+pq_flush();`
	`717`	`+`
	`718`	`+proc_exit(0);`
`716`	`719`	`}`
`717`	`720`	`}`
`718`	`721`	`}`

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Commit9c0e2b9

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`‎src/backend/replication/walsender.c‎`

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