Microsoft KB Archive/289209

= Server Stops Accepting New Network Connections and Performance Degrades with Event 2019 =

Article ID: 289209

Article Last Modified on 1/31/2007

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APPLIES TO


 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 1

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This article was previously published under Q289209



SYMPTOMS
When you run a TCP/IP sockets-based program on a server that runs Windows 2000 Server, a memory leak may keep the server from accepting new network connections. Over a period of time, server performance degrades, and the server may lock up. The system log records the following event:

Event ID 2019

Description: The server was unable to allocate from the system nonpaged pool because the pool was empty.



CAUSE
This behavior can occur when a TCP/IP process attempts to open a nonexistent or unsupported socket. When this occurs, the NTFS file system may leave unreferenced file control breaks in memory after it gains access to the attribute list, resulting in a memory leak.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack



WORKAROUND
To work around this behavior, at a command prompt, run a read only &quot;chkdsk&quot; (without the quotation marks) command on each drive in the system. Running the Chkdsk tool temporarily reclaims memory from the nonpaged pool and allows the server to function properly.



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

This problem was first corrected in Windows 2000 Service Pack 2.



MORE INFORMATION
For additional information, refer to the following Microsoft Knowledge Base article:

133384 Event ID 2019: Nonpaged Memory Pool Empty

Additional query words: utility

Keywords: kbbug kbfix kbwin2000presp2fix kbenv kbnetwork KB289209

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