[Fedora-directory-users] Can't locate CSN in Multi-Master replica

[Rich Megginson]

Dael Maselli wrote:
> Dear Richard,
>
> The problem came back, this time in one node.
I've created a bug to track this issue - 
https://bugzilla.redhat.com/show_bug.cgi?id=388021

A less drastic solution than recreating everything from scratch will be 
to export the database from a good master, and reimport it into that 
master, then reinit all other masters from that master.  You will 
probably want to make sure there are no pending updates in any of your 
masters first, or you will lose them.

I'm working on a better fix for this, but in the meantime, you should 
not have to reinstall everything.
>
> We have 4-way replica with the nodes: ds-m1, ds-2, ds-m3, ds-m4.
>
> Yesterday all RW replica works fine, this morning one node (ds-m3) 
> crashed
> and restarted with this log:
>
> [14/Nov/2007:09:16:37 +0100] - Fedora-Directory/1.0.4 B2006.312.1621 
> starting up
> [14/Nov/2007:09:16:37 +0100] - Detected Disorderly Shutdown last time 
> Directory Server was running, recovering database.
> [14/Nov/2007:09:16:38 +0100] NSMMReplicationPlugin - 
> replica_check_for_data_reload: Warning: data for replica dc=infn,dc=it 
> was reloaded and it no longer matches the data in the changelog 
> (replica data > changelog). Recreating the changelog file. This could 
> affect replication with replica's consumers in which case the 
> consumers should be reinitialized.
>
> Then I tried to reinitialize ds-m3 from ds-m1 and in ds-m3 log it wrote:
> [14/Nov/2007:15:21:36 +0100] NSMMReplicationPlugin - 
> multimaster_be_state_change: replica dc=infn,dc=it is going offline; 
> disabling replication
> [14/Nov/2007:15:21:36 +0100] - WARNING: Import is running with 
> nsslapd-db-private-import-mem on; No other process is allowed to 
> access the database
> [14/Nov/2007:15:21:38 +0100] - import userRoot: Workers finished; 
> cleaning up...
> [14/Nov/2007:15:21:39 +0100] - import userRoot: Workers cleaned up.
> [14/Nov/2007:15:21:39 +0100] - import userRoot: Indexing complete.  
> Post-processing...
> [14/Nov/2007:15:21:39 +0100] - import userRoot: Flushing caches...
> [14/Nov/2007:15:21:39 +0100] - import userRoot: Closing files...
> [14/Nov/2007:15:21:39 +0100] - import userRoot: Import complete.  
> Processed 10 entries in 2 seconds. (5.00 entries/sec)
> [14/Nov/2007:15:21:39 +0100] NSMMReplicationPlugin - 
> multimaster_be_state_change: replica dc=infn,dc=it is coming online; 
> enabling replication
> [14/Nov/2007:15:21:39 +0100] NSMMReplicationPlugin - 
> replica_reload_ruv: Warning: new data for replica dc=infn,dc=it does 
> not match the data in the chang elog.
>  Recreating the changelog file. This could affect replication with 
> replica's  consumers in which case the consumers should be reinitialized.
>
> So I tried to make changes on directory from node ds-m1,2 or 4 and it 
> propagates to
> all 4 node (including ds-m3). BUT when I try to make changes from 
> ds-m3 it will not
> propagates and in the ds-m3 log there is angain:
>
> [14/Nov/2007:15:42:22 +0100] agmt="cn=m3-m2" (ds-m2:636) - Can't 
> locate CSN 4739d5a5000000030000 in the changelog (DB rc=-30990). The 
> consumer may need to be reinitialized.
> [14/Nov/2007:15:42:22 +0100] agmt="cn=m3-m4" (ds-m4:636) - Can't 
> locate CSN 4739d5a5000000030000 in the changelog (DB rc=-30990). The 
> consumer may need to be reinitialized.
> [14/Nov/2007:15:42:22 +0100] agmt="cn=m3-m1" (ds-m1:636) - Can't 
> locate CSN 4739d5a5000000030000 in the changelog (DB rc=-30990). The 
> consumer may need to be reinitialized.
>
> So, please help me! What can I do now, we can't reinstall from scratch 
> anytime one
> server goes down.
>
> Thank you. Best regards.
>
> Dael Maselli.
>
> Dael Maselli wrote:
>> Well. I restarted from scratch. Now all works fine.
>>
>> Now I have 4-way RW replicas with agreements from all to all.
>>
>> Thank you for assistance.
>>
>> Regards.
>>
>>
>>
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>
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