Re: curious regression failures (was Re: [PATCHES] PL/TCL Patch to prevent postgres from becoming multithreaded)

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>, pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: curious regression failures (was Re: [PATCHES] PL/TCL Patch to prevent postgres from becoming multithreaded)
Date: 2007-09-19 15:55:59
Message-ID: 46F1468F.1080903@dunslane.net
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Tom Lane wrote:
> Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
>
>> Tom Lane wrote:
>>
>>> Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
>>>
>>>> ! ERROR: could not read block 2 of relation 1663/16384/2606: read only 0 of 8192 bytes
>>>>
>>> Is that repeatable? What sort of filesystem are you testing on?
>>> (soft-mounted NFS by any chance?)
>>>
>
>
>> doesn't seem to be repeatable :-(
>>
>
> Hmm ...
> http://www.pgbuildfarm.org/cgi-bin/show_log.pl?nm=luna_moth&dt=2007-09-19%2013:10:01
>
> Exact same error --- is it at the same place in the tests where you saw it?
>
> Now that I think about it, there have been similar transient failures
> ("read only 0 of 8192 bytes") in the buildfarm before. It would be
> helpful to collect a list of exactly which build reports contain
> that string, but AFAIK there's no very easy way to do that; Andrew,
> any suggestions?
>
>
>

pgbfprod=# select sysname, stage, snapshot from build_status where log ~
$$read only \d+ of \d+ bytes$$;
sysname | stage | snapshot
-----------+--------------+---------------------
zebra | InstallCheck | 2007-09-11 10:25:03
wildebeest | InstallCheck | 2007-09-11 22:00:11
baiji | InstallCheck | 2007-09-12 22:39:24
luna_moth | InstallCheck | 2007-09-19 13:10:01
(4 rows)

cheers

andrew

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