Article ID: 197491
Article Last Modified on 10/28/2006
APPLIES TO
- Microsoft Exchange Server 5.5 Standard Edition
This article was previously published under Q197491
SYMPTOMS
The Microsoft Exchange information store process (Store.exe) may consume 100 percent of the server's processor time. This is viewed by using the Windows NT Performance Monitor utility, clicking the Object:Process and the Counter:% CPU Utilization. Also, viewing the "% CPU Utilization" of all of the threads being used by the store process (in Performance Monitor, click Object:Thread and Instance:STORE; add all of the instance STORE to the chart) one thread will appear to be consuming 100 percent of the CPU time.
CAUSE
An NNTP client was downloading a NNTP message from a folder in the Public Store, this message had a subject line greater than 20 KB. The buffer being used to hold the subject line was hardcoded at 20 KB. Therefore the code was continually looping trying to read in the contents of the subject line that were past this 20 KB limit. This process resulted in high CPU usage by the information store process.
RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
The English version of this fix should have the following file attributes or later:
Component: Information Store
File Name Version
---------------------
Gapi32.dll 5.5.2502
Mdbmsg.dll 5.5.2502
Store.exe 5.5.2502
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.
Additional query words: crash hang
Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB197491
