Hi folks,
We've got multi-master replication setup between two masters. The replication recently broke after being stable for a few years, and in troubleshooting it appears that the issue is that both masters have the same nsDS5ReplicaId defined (both are set to 2). Both masters have nearly the same output from running:
$ ldapsearch -x -b 'cn=replica,cn="dc=someorg,dc=com",cn=mapping tree,cn=config' -D "cn=Directory Manager" -W
# replica, dc\3Dsomeorg\2Cdc\3Dcom, mapping tree, config
dn: cn=replica,cn=dc\3Dsomeorg\2Cdc\3Dcom,cn=mapping tree,cn=config
objectClass: nsDS5Replica
objectClass: top
nsDS5ReplicaRoot: dc=someorg,dc=com
nsDS5ReplicaType: 3
nsDS5Flags: 1
nsDS5ReplicaId: 2
nsds5ReplicaPurgeDelay: 604800
nsDS5ReplicaBindDN: cn=replication manager,cn=config
cn: replica
nsState:: AgAAAAAAAADES3NbAAAAAAAAAAAAAAAAAgAAAAAAAAABAAAAAAAAAA==
nsDS5ReplicaName: 52c33a02-368211e1-a5228b52-eb63f05c
nsds5ReplicaChangeCount: 17190
nsds5replicareapactive: 0
The only difference in this output between the two servers is the nsds5ReplicaChangeCount.
I believe I can use ldapmodify to change the replica ID on one of the nodes, but am unsure whether or not this is the proper way to fix the issue - or if there is anything additional that needs to take into account when making this change.
We inherited this LDAP system a while ago, and are not very familiar with how replication works in general, so we're reluctant to try this in fear of causing more damage by doing the wrong thing.
If anyone has a suggestion or advice on this, your comments would be appreciated.
Thanks,
-devon
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