Symptoms

When you run a Microsoft Office Communications Server 2007 R2 Group Chat client, the Groupchatconsole.exe process consumes increasing amounts of available memory. Eventually, the process may consume sufficient memory to adversely affect computer performance.

Cause

This issue occurs because the Group Chat client does not receive the category context event when the client removes a presence subscription. Therefore, a memory leak occurs. This leak is compounded when the client creates and removes multiple subscriptions during its lifetime.

Note The Group Chat client periodically queries the presence of chat room participants in an open chat room by creating a presence subscription. This subscription covers several categories, such as contact card, state, and user color for some contacts. The subscription applies to all chat room participants. The client removes the subscription after the client receives all the subscription results.

Resolution

To resolve this issue, install the following update:

2669942 Description of the update for the Office Communications Server 2007 R2 Group Chat client: February, 2012

More Information

For more information about Group Chat, visit the following Microsoft website:

General information about Group ChatFor more information about the _IUccPresentityEvents.OnCategoryContextRemovedmethod, visit the following Microsoft website:

General information about the _IUccPresentityEvents.OnCategoryContextRemoved method

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