Re: [HACKERS] Transactions involving multiple postgres foreign servers

On Thu, Jan 26, 2017 at 6:04 PM, vinayak
<Pokale_Vinayak_q3@lab.ntt.co.jp> wrote:
> Hi Sawada-san,
>
> On 2017/01/26 16:51, Masahiko Sawada wrote:
>
> Thank you for reviewing!
>
> I think this is a bug of pg_fdw_resolver contrib module. I had
> forgotten to change the SQL executed by pg_fdw_resolver process.
> Attached latest version 002 patch.
>
> As previous version patch conflicts to current HEAD, attached updated
> version patches. Also I fixed some bugs in pg_fdw_xact_resolver and
> added some documentations.
> Please review it.
>
> Thank you updating the patches.
>
> I have applied patches on Postgres HEAD.
> I have created the postgres=fdw extension in PostgreSQL and then I got
> segmentation fault.
> Details:
> =# 2017-01-26 17:52:56.156 JST [3411] LOG:  worker process: foreign
> transaction resolver launcher (PID 3418) was terminated by signal 11:
> Segmentation fault
> 2017-01-26 17:52:56.156 JST [3411] LOG:  terminating any other active server
> processes
> 2017-01-26 17:52:56.156 JST [3425] WARNING:  terminating connection because
> of crash of another server process
> 2017-01-26 17:52:56.156 JST [3425] DETAIL:  The postmaster has commanded
> this server process to roll back the current transaction and exit, because
> another server process exited abnormally and possibly corrupted shared
> memory.
> 2017-01-26 17:52:56.156 JST [3425] HINT:  In a moment you should be able to
> reconnect to the database and repeat your command.
>
> Is this a bug?
>

Thank you for testing!

Sorry, I attached wrong version patch of pg_fdw_xact_resovler. Please
use attached patch.

Regards,

--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center

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