[Fedora-directory-users] Replication, migration from slaver to master, error with agreement

[Olivier SILBER]

Dear all,

I have setup 4 servers: 2 master (server1 & server2) and 2 slaves 
(server3 & server4). Server1 and Server2 have the agreement to replica 
each other but also the agreement for replication to server3 and 
server4. Everything works perfectly now with this solution.

After a while, I think that I do not need a so big setting and would 
like to remove DS from server1 and server2 and use only server3 and 
server4 as masters with replication between them. Why? because server1 
and server2 are also my end-user servers and DS use too much resources, 
so they have started to be very slow.... and my end-user complain!!!!

So my first try was to define server3 and server4 as multi-master as 
well as server1 and server2, and after add an agreement into this 2 
servers. But I can not add any agreement into server3 and server4, I 
have always this error from my logs:

NSMMReplicationPlugin - agmtlist_add_callback: Can't start agreement 
"cn=replication to server4,cn=replica,cn=o=xxxx\,c=xx,cn=mapping 
tree,cn=config"

I have used both the admin console and the script to generate a 
multimaster replication (perl), both are providing me this error. I have 
put the debug level to the maxi (8156) with the same error (no more 
detail !!!!).

What I did into server3:
    1) uncheck consumer -> restart
    2) check replica with multi-master -> restart (of course with an 
unique ID)
    3) create the agreement -> error

I think that an old slave could be a master as easy as this and probably 
I will need to refresh the database from scrash into server3 and server4 
(backup, init and restore). But because this 2 servers are in operation, 
I do not want to do this if there is another solution more accurate.

Thanks

Olivier
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