Re: BUG #14180: Segmentation fault on replication slave

From: Andres Freund <andres(at)anarazel(dot)de>
To: Bo Ørsted Andresen <boa(at)neogrid(dot)dk>
Cc: "pgsql-bugs(at)postgresql(dot)org" <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: BUG #14180: Segmentation fault on replication slave
Date: 2016-06-07 17:59:59
Message-ID: 20160607175959.e22j2qvam4qa66vu@alap3.anarazel.de
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On 2016-06-07 17:53:46 +0000, Bo Ørsted Andresen wrote:
> > On 2016-06-07 19:41, Andres Freund wrote:
> > > Not sure what else I can do short of recompiling postgresql mysql.
> >
> > Any chance the running version of postgres is out of date with the installed
> > binaries / debug symbols?
>
> You mean that I upgraded without restarting postgres before the segfault?

Yes, that's what I was wondering. But alas, that's aparently not the
reason.

This is going to be a bit more complicated, sorry :(

Could you try to reproduce the problem, and do 'p/x ReadRecPtr'? That
should give you something like 0x5434343496. If you rewrite this as
first-four-bytes/last-four-bytes e.g. 54/34343496 you get the LSN. With
that, could you try
pg_xlogdump -p /path/to/data/directory -s 54/34343496 -n 100
and send the output?

Regards,

Andres

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