[Fedora-directory-users] Recovering from database corruption?

[Richard Megginson]

Josh Kelley wrote:
> I'm afraid that I may have messed up our FDS installation and would
> greatly appreciate advice on how to fix things.
>
> We have two Fedora Directory Servers, urim and thummim, set up to
> replicate changes to each other.  Following a combination of hardware
> failure and administrator error (i.e., I thought that the server was
> hung and killed it, possibly while it was in the middle of recovery),
> the database got corrupted on urim, and it refused to start, giving
> the following errors in its log file:
>
> [27/Mar/2007:17:10:18 -0400] - libdb: Ignoring log file:
> /opt/fedora-ds/slapd-urim/db/log.0000000164: magic number 0, not 40988
> [27/Mar/2007:17:10:20 -0400] - libdb: Invalid log file:
> log.0000000164: Invalid argument
> [27/Mar/2007:17:10:20 -0400] - libdb: PANIC: Invalid argument
> [27/Mar/2007:17:10:20 -0400] - libdb: PANIC: DB_RUNRECOVERY: Fatal
> error, run database recovery
> [27/Mar/2007:17:10:20 -0400] - Opening database environment
> (/opt/fedora-ds/slapd-urim/db) failed. err=-30978: DB_RUNRECOVERY:
> Fatal error, run database recovery
> [27/Mar/2007:17:10:20 -0400] - start: Failed to init database,
> err=-30978 DB_RUNRECOVERY: Fatal error, run database recovery
>
> So then I moved the invalid log file out of the way and successfully
> started FDS.  Since urim was now out of date and had some database
> inconsistencies, I opened the administrative console on thummim,
> selected the replication agreement to urim, and told it to
> (re)initialize the consumer.
>
> Everything appears to be correct now; however, in the error logs on
> urim, I got the following warning/error:
> [27/Mar/2007:17:23:43 -0400] NSMMReplicationPlugin -
> replica_reload_ruv: Warning: new data for replica dc=local does not
> match the data in the changelog.
> Recreating the changelog file. This could affect replication with
> replica's  consumers in which case the consumers should be
> reinitialized.
>
> Does this mean that I now need to reinitialize thummim as well?  Or is
> this warning the result of urim's changelog forcibly being sync'ed
> with thummim, and everything's okay now?
The latter, I think.  I think you should be ok now.
>
> Thank you.
>
> Josh Kelley
>
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