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Re: SIGSEGV when trying to start in single user mode

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Hello Tom,

thank you for your help.

I resetted the xlog and the server started again.

Regards,
Björn

2009/9/19 Tom Lane <tgl@xxxxxxxxxxxxx>:
> =?UTF-8?B?QmrDtnJuIEjDpHVzZXI=?= <bjoernhaeuser@xxxxxxxxxxxxxx> writes:
>> I have a problem with my PostgreSQL 8.3.4 installation.
>
>> We had some problems with our storage subsystem and it seems
>> postgresql suffered a little bit from it.
>> Here are some log excerpts:
>
>> # /etc/init.d/postgresql-8.3 start
>> Starting PostgreSQL 8.3 database server: main* Removed stale pid file.
>
> You really need to get rid of that startup script, or at least get rid
> of the part of it that thinks it should remove the postmaster's PID
> file.  That's completely unsafe and poor practice.  (I doubt it's
> related to your immediate problem, though.)
>
>> 2009-09-19 16:51:00 CEST PANIC:  right sibling's left-link doesn't
>> match: block 49696 links to 49978 instead of expected 3 in index
>> "132010"
>> 2009-09-19 16:51:00 CEST LOG:  startup process (PID 3727) was
>> terminated by signal 6: Aborted
>
> Ugh, so you have a corrupted index that is touched by the unreplayed
> WAL sequence.  I'm afraid the only easy way out of this is to use
> pg_resetxlog, which is a bit risky since you'll lose whatever other
> changes haven't been applied to the database.  Probably the safest
> thing to do is pg_resetxlog, start up, dump everything, initdb,
> reload.
>
>> But when I tried to start Postgresql in single-user mode to be able to
>> repair this index i am getting the mentioned SIGSEGV.
>
> Hmm, that's a bug, but even if it weren't broken it would not help you.
> A single-user backend still has to replay any unreplayed WAL, so it
> would still hit the PANIC.
>
>                        regards, tom lane
>

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