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Re: [BUGS] BUG #5305: Postgres service stops when closing Windows session

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Magnus Hagander <magnus(at)hagander(dot)net>, Bruce Momjian <bruce(at)momjian(dot)us>, Chris Travers <chris(at)metatrontech(dot)com>, Cristian Bittel <cbittel(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [BUGS] BUG #5305: Postgres service stops when closing Windows session
Date: 2010-09-09 20:09:01
Message-ID: 5282.1284062941@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugspgsql-hackers
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> It's hard to say what the safest option is, I think.  There seem to be
> basically three proposals on the table:

> 1. Back-port the dead-man switch, and ignore exit 128.
> 2. Don't back-port the dead-man switch, but ignore exit 128 anyway.
> 3. Revert to Magnus's original solution.

> Each of these has advantages and disadvantages.  The advantage of #1
> is that it is safer than #2, and that is usually something we prize
> fairly highly.  The disadvantage of #1 is that it involves
> back-porting the dead-man switch, but on the flip side that code has
> been out in the field for over a year now in 8.4, and AFAIK we haven't
> any trouble with it.  Solution #3 should be approximately as safe as
> solution #1, and has the advantage of touching less code in the back
> branches, but on the other hand it is also NEW code.  So I think it's
> arguable which is the best solution.  I think I like option #2 least
> as among those choices, but it's a tough call.

Well, I don't want to use Magnus' original solution in 8.4 or up,
so I don't like #3 much: it's not only new code but code which would
get very limited testing.  And I don't believe that the risk of
unexpected use of exit(128) is large enough to make #1 preferable to #2.
YMMV.

			regards, tom lane

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