Re: bgworker crashed or not?

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Petr Jelinek <petr(at)2ndquadrant(dot)com>
Cc: Craig Ringer <craig(at)2ndquadrant(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Antonin Houska <antonin(dot)houska(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Abhijit Menon-Sen <ams(at)2ndquadrant(dot)com>
Subject: Re: bgworker crashed or not?
Date: 2014-04-30 21:35:24
Message-ID: CA+Tgmob4Ur9b4opDJXVBpDSNSGpp5V-zG2V4Vt7RdTLT-ZAuLQ@mail.gmail.com
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On Mon, Apr 28, 2014 at 4:19 PM, Petr Jelinek <petr(at)2ndquadrant(dot)com> wrote:
> On 28/04/14 16:27, Robert Haas wrote:
>> On Thu, Apr 24, 2014 at 1:39 AM, Craig Ringer <craig(at)2ndquadrant(dot)com>
>> wrote:
>>> On 04/17/2014 08:35 AM, Craig Ringer wrote:
>>> I've just noticed that the bgworker control interfaces do not honour
>>> bgw.bgw_restart_time = BGW_NEVER_RESTART if you exit with status zero.
>>>
>>> This means that it's not simply a problem where you can't say "restart
>>> me if I crash, but not if I exit normally".
>>>
>>> You also can't even say "never restart me at all". Because
>>> "BGW_NEVER_RESTART" seems to really mean "BGW_NO_RESTART_ON_CRASH".
>>>
>>> This _needs_fixing before 9.4.
>>
>>
>> It seems we have consensus on what to do about this, but what we
>> haven't got is a patch.
>
> If you mean the consensus that exit status 0 should mean permanent stop then
> I think the patch can be as simple as attached.

Hmm. Well, at the very least, you need to update the comment.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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