Re: time-delayed standbys

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Jaime Casanova <jaime(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: time-delayed standbys
Date: 2011-05-11 11:16:11
Message-ID: BANLkTin4bCFrFX-n8JVG7QfzdYhVDBWnJQ@mail.gmail.com
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On Wed, May 11, 2011 at 6:50 PM, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> I think we can just always call ShutdownWalRcv(). It should be gone if the
> server was promoted while streaming, but that's just an implementation
> detail of what the promotion code does. There's no hard reason why it
> shouldn't be running at that point anymore, as long as we kill it before
> going any further.

Okay. But I'd like to add the following assertion check just before
ShutdownWalRcv() which you added, in order to detect such a bug
that we found this time, i.e., the bug which causes unexpected end
of recovery. Thought?

Assert(reachedStopPoint || !WalRcvInProgress())

> Committed a patch to do that.

Thanks. Should we backport it to 9.0? 9.0 has the same problem.

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center

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