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Fix oversight: in case where SIGTERM is received while there are 

live backends, the archiver and stats processes never got sent a
kill signal.  They'd eventually exit on their own, but not for awhile,
which is a bit annoying when you are trying to replace the executable
file on a platform that doesn't allow removal of busy executables.
Also, tweak main loop logic so that we will perform the background
tasks after select() returns EINTR.
This commit is contained in:
Tom Lane 2004-07-27 01:46:03 +00:00
parent 23671f5a0e
commit 0177f43070
1 changed files with 19 additions and 7 deletions
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26
src/backend/postmaster/postmaster.c
View File

@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.415 2004/07/24 20:01:42 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.416 2004/07/27 01:46:03 tgl Exp $
*
* NOTES
*
@ -1154,12 +1154,13 @@ ServerLoop(void)
if (selres < 0)
{
if (errno == EINTR || errno == EWOULDBLOCK)
continue;
ereport(LOG,
(errcode_for_socket_access(),
errmsg("select() failed in postmaster: %m")));
return STATUS_ERROR;
if (errno != EINTR && errno != EWOULDBLOCK)
{
ereport(LOG,
(errcode_for_socket_access(),
errmsg("select() failed in postmaster: %m")));
return STATUS_ERROR;
}
}
/*
@ -2014,6 +2015,11 @@ reaper(SIGNAL_ARGS)
* We expect that it wrote a shutdown checkpoint. (If
* for some reason it didn't, recovery will occur on next
* postmaster start.)
*
* Note: we do not wait around for exit of the archiver or
* stats processes. They've been sent SIGQUIT by this
* point, and in any case contain logic to commit hara-kiri
* if they notice the postmaster is gone.
*/
ExitPostmaster(0);
}
@ -2095,6 +2101,12 @@ reaper(SIGNAL_ARGS)
/* And tell it to shut down */
if (BgWriterPID != 0)
kill(BgWriterPID, SIGUSR2);
/* Tell pgarch to shut down too; nothing left for it to do */
if (PgArchPID != 0)
kill(PgArchPID, SIGQUIT);
/* Tell pgstat to shut down too; nothing left for it to do */
if (PgStatPID != 0)
kill(PgStatPID, SIGQUIT);
}
reaper_done: