Re: [HACKERS] v10 pg_ctl compatibility

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От Andres Freund
Тема Re: [HACKERS] v10 pg_ctl compatibility
Дата
Msg-id 20170926223653.eozpatj3pokil532@alap3.anarazel.de
обсуждение исходный текст
Ответ на Re: [HACKERS] v10 pg_ctl compatibility  (Jeff Janes <jeff.janes@gmail.com>)
Список pgsql-hackers
On 2017-09-26 15:15:39 -0700, Jeff Janes wrote:
> On Tue, Sep 26, 2017 at 1:10 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> 
> > Jeff Janes <jeff.janes@gmail.com> writes:
> > > To add insult to injury, when v10 pg_ctl does restart a pre-10 server and
> > > it sits there for a long time waiting for it to start up even though it
> > has
> > > already started up, if I hit ctrl-C because I assume something is
> > horribly
> > > wrong, it then goes ahead and kills the successfully started-and-running
> > > server.
> >
> > Really?  The server should have detached itself from your terminal
> > group long before that.  What platform is this?
> >
> 
> 
> CentOS release 6.9 (Final)
> 
> The sever log file (9.6) says:
> 
> 
>    64926  2017-09-26 13:56:38.284 PDT LOG:  database system was shut down
> at 2017-09-26 13:56:37 PDT
>    64926  2017-09-26 13:56:38.299 PDT LOG:  MultiXact member wraparound
> protections are now enabled
>    64930  2017-09-26 13:56:38.311 PDT LOG:  autovacuum launcher started
>    64924  2017-09-26 13:56:38.313 PDT LOG:  database system is ready to
> accept connections
> ...  hit ctrl-C
>    64924  2017-09-26 13:56:47.237 PDT LOG:  received fast shutdown request
>    64924  2017-09-26 13:56:47.237 PDT LOG:  aborting any active transactions
>    64930  2017-09-26 13:56:47.244 PDT LOG:  autovacuum launcher shutting
> down
>    64927  2017-09-26 13:56:47.261 PDT LOG:  shutting down
> ...

It's reproducible here.  Postmaster never calls setsid() for itself, nor
does pg_ctl for it, therefore ctrl-c's SIGTERM to pg_ctl also go to its
children, namely postmaster.

Greetings,

Andres Freund


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