The Microsoft Exchange Replication Service was unable to perform an incremental re-seed of the passive node for %1. The specific error code returned is: %2.

Product: Exchange
Event ID: 2058
Source: MSExchangeRepl
Version: 8.0
Symbolic Name: IncrementalReseedError
Message: The Microsoft Exchange Replication Service was unable to perform an incremental re-seed of the passive node for %1. The specific error code returned is: %2.

The Error event indicates that the Microsoft® Exchange Replication (MSExchangeRepl) service could not perform an incremental reseed of the passive node because the service encountered an error as specified by the error code in the event description.

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 the passive node when the passive node is restored and 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 that can cause the database to diverge:

  • The active database was manually mounted after the failover because it was outside the auto-mount criteria but is still an acceptable version of the data. This would have to be explicitly done by the administrator. Such actions guarantee a reseed.

  • The system experienced a split brain condition because of a software error or operator error.

    Note   The Microsoft Cluster Services (MSCS) can usually avoid this condition. However, in rare cases, you can have this condition when both nodes think they are active and generate their own set of logs independently. Therefore, logs of the same name on each node will contain different content.

  • The failure occurred when the active node could continue for a brief period although it was not outwardly available. This can occur when there are concurrent double failures on the networks and all traffic to the active node is prevented. MSCS lets the mailbox server run while MSCS determines whether it can re-form quorum. At the same time, the passive node may be able to form quorum and bring the mailbox server and its databases online. This is a short window of about 30 seconds. The probability that this condition will occur is reduced if the cluster group owner is the same as clustered mailbox server owner.

    Note   During this time clients cannot be served. Therefore any traffic that is committed must be maintenance activity.

For more information about CCR, see Cluster Continuous Replication.

User Action

To resolve this error, follow one or more of these steps:

  • Fix the error represented by the error code

  • If the new passive node cannot copy because divergence in the log stream of the storage group on the passive node is larger than the Lost Log Resilience (LLR), allow a lossy mount (that is, allow the copy to mount without all the log files). Run the Get-StorageGroupCopyStatus cmdlet from Exchange Management Shell to check the health status of the copy. For more information, see Get-StorageGroupCopyStatus.

  • Reseed the new passive node. The Microsoft Exchange Replication service will automatically start to reseed the storage group on the passive node.

For more information about LLR, see Planning for Cluster Continuous Replication.

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.