When a witness server of a Microsoft Exchange database availability group (DAG) is under a heavy workload, the Microsoft Exchange Replication service crashes on Exchange Server 2010 DAG members. Additionally, following error messages are logged on Exchange Server 2010 DAG members:
Log Name: Application Source: MSExchange Common Date: Date Event ID: 4999 Task Category: General Level: Error Keywords: Classic User: N/A Computer: Computer Description: Watson report about to be sent for process id: Process ID, with parameters: E12, Build Type, Version, msexchangerepl, M.E.Cluster.Replay, M.E.C.A.AmHelper.GetBootTimeWithWmi, S.Management.ManagementException, XXXX, Version. ErrorReportingEnabled: True
Log Name: Application Source: MSExchangeRepl Date: Date Event ID: 2060 Task Category: Service Level: Error Keywords: Classic User: N/A Computer: Computer Description: The Microsoft Exchange Replication service encountered a transient error while attempting to start a replication instance for mailbox database\mailbox server. The copy will be set to failed. Error: The NetworkManager has not yet been initialized. Check the event logs to determine the cause.
Note If you run the following cmdlet against the witness server from the DAG members, the WMI query fails:
This issue occurs because an OutOfMemoryException exception occurs when DAG members try to obtain the start time of the witness server by Windows Management Instrumentation (WMI). This exception causes the Microsoft Exchange Replication service to crash on the DAG members.
To resolve this issue, install the following update rollup:
2645995 Description of Update Rollup 1 for Exchange Server 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about database availability group, visit the following Microsoft website: