|Message:||The Microsoft Exchange Replication Service was unable to perform an incremental re-seed of the passive node for the clustered mailbox server ‘%1’ because the log files on the active node have diverged too widely from the log files on the passive node. A full re-seed of the passive node for this storage group is required. Re-seeding can be done by using the Update-StorageGroupCopy cmdlet in the Exchange Management Shell.|
This Error event indicates that the Microsoft® Exchange Replication (MSExchangeRepl) service could not perform an incremental reseed of the passive node because the logs on the active node have diverged too widely from the logs on the passive node.
Incremental reseed must see the active log stream in order to perform its operation.
The Microsoft Exchange Replication service tries to perform an incremental reseed after a failover if the passive and active database copies for the specified storage group are out of sync. An incremental reseed is performed to avoid a full reseed. The replication service detects that the copy of the database on the active node has diverged from the copy on passive node when the passive node is restored. The replication service then tries to resynchronize with the now active database.
Note Incremental reseed cannot detect log file divergence until there is traffic to the storage group.
The event will only appear when the passive node returns to service after it has been previously active and then failed. Generally, there are three conditions can cause the database copy on the passive node to diverge:
For more information about CCR, see Cluster Continuous Replication.
To resolve the error, reseed the storage group copy on the passive node. Follow the steps outlined in this topic, How to Seed a Cluster Continuous Replication Copy.
If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.