Microsoft KB Archive/271993

= RSVP Service Can Handle Only a Limited Number of QoS-Enabled Processes =

Article ID: 271993

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q271993



SYMPTOMS
The Quality of Service (QoS) RSVP service can handle only a limited number of QoS-enabled processes. When a certain number (29) of QoS-enabled processes are running, a new QoS-enabled process may not work, and may generate error code 11015 (&quot;WSA_QOS_GENERIC_ERROR: General QOS error&quot;). This limitation may occur on Terminal Services-based servers.



CAUSE
The QoS RSVP service uses the WaitForMultipleObject function for communication with the QoS processes. WaitForMultipleObject can handle only 64 events. The service uses six events internally and requires two events for each QoS-enabled process. Therefore, it can handle only 29 ([64 - 6] / 2 = 29) QoS processes. The thirtieth QoS-enabled process generates error code 11015.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbbug kbgqos kbnofix KB271993

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