The Microsoft.Exchange.Search.ExSearch.exe process consumes 100% CPU after you apply Update Rollup 1 or Update Rollup 2 for Exchange Server 2007 SP3 on the passive node of a SCC

You apply Update Rollup 1 or Update Rollup 2 for Exchange Server 2007 Service Pack 3 (SP3) on the passive node of a single copy cluster (SCC). In this scenario, the Microsoft.Exchange.Search.ExSearch.exe (Microsoft Exchange Search Indexer) process consumes 100% of CPU resources and many UDP ports. During this time, the Microsoft Exchange Replication Service service and Cluster Service service cannot start, and you receive the following error message: Note This issue only occurs when the Microsoft Exchange Search Indexer service is started before the Microsoft Exchange Replication Service service and Cluster Service service are started.

This issue occurs because an exception occurs in the Microsoft.Exchange.Search.ExSearch.exe process.

To resolve this issue, install the following update rollup:

To work around this issue, set the startup type of the Microsoft Exchange Search Indexer service to Manual. Or, you can set the Microsoft Exchange Search Indexer service as a dependency of the Cluster Service service.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about single copy clusters, visit the following Microsoft website: