Re: Re: [BUGS] BUG #11805: Missing SetServiceStatus call during service shutdown in pg_ctl (Windows only)

From: Magnus Hagander <magnus(at)hagander(dot)net>
To: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, krystian(dot)bigaj(at)gmail(dot)com, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: [BUGS] BUG #11805: Missing SetServiceStatus call during service shutdown in pg_ctl (Windows only)
Date: 2015-05-07 13:19:52
Message-ID: CABUevExYGmiO9F-0HydTU7BKv+rj4yjYad3pD7q-TpQan-YHCQ@mail.gmail.com
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On Thu, Apr 30, 2015 at 3:08 PM, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
wrote:

> On Thu, Apr 30, 2015 at 9:53 PM, Robert Haas <robertmhaas(at)gmail(dot)com>
> wrote:
> > On Sat, Mar 21, 2015 at 9:00 AM, Michael Paquier
> > <michael(dot)paquier(at)gmail(dot)com> wrote:
> >> On Fri, Mar 20, 2015 at 9:48 PM, Bruce Momjian <bruce(at)momjian(dot)us>
> wrote:
> >>> On Tue, Oct 28, 2014 at 07:02:41AM +0000, krystian(dot)bigaj(at)gmail(dot)com
> wrote:
> >>>> The following bug has been logged on the website:
> >>>>
> >>>> Bug reference: 11805
> >>>> Logged by: Krystian Bigaj
> >>>> Email address: krystian(dot)bigaj(at)gmail(dot)com
> >>>> PostgreSQL version: 9.3.5
> >>>> Operating system: Windows 7 Pro x64
> >>>> Description:
> >>>>
> >>>> pg_ctl on Windows during service start/shutdown should notify service
> >>>> manager about it's status by increment dwCheckPoint and call to
> >>>> SetServiceStatus/pgwin32_SetServiceStatus.
> >>>>
> >>>> However during shutdown there is a missing call to SetServiceStatus.
> >>>> See src\bin\pg_ctl\pg_ctl.c:
> >>>
> >>> [ thread moved to hackers ]
> >>>
> >>> Can a Windows person look into this issue?
> >>>
> >>>
> http://www.postgresql.org/message-id/20141028070241.2593.58180@wrigleys.postgresql.org
> >>>
> >>> The thread includes a patch. I need a second person to verify its
> >>> validity. Thanks.
> >>
> >> FWIW, it looks sane to me to do so, ServiceMain declaration is in
> >> charge to start the service, and to wait for the postmaster to stop,
> >> and indeed process may increment dwcheckpoint in -w mode, and it
> >> expects for process to wait for 12 times but this promise is broken.
> >> The extra calls to SetServiceStatus are also welcome to let the SCM
> >> know the current status in more details.
> >
> > So, what's next here?
>
> I guess that a committer opinion would be welcome. IMO the current
> behavior is a bug.
>

Agreed, it pretty clearly is.

I've applied this patch (with a minor stylistic change), and backpatched.

--
Magnus Hagander
Me: http://www.hagander.net/
Work: http://www.redpill-linpro.com/

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