Microsoft KB Archive/217149

= XFOR: Chat Service May Terminate Unexpectedly When Sending a 0-Byte Privmsg or Whisper =

Article ID: 217149

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 2

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This article was previously published under Q217149





SYMPTOMS
The Microsoft Exchange Chat Service version 5.5 Service Pack 2 may terminate unexpectedly when sending a zero byte privmsg or whisper. A call stack similar to the following may appear in the Drwtsn32.log file:

FramePtr RetAddr   Param1   Function Name 02ffe894 0042030d  02ffeb20 CHATSVC!CIrcUser::SendMsg+0x5b4 02ffea7c 0042d691  02ffeb20 CHATSVC!CChannel::SendMsg+0x7bd 02ffec0c 00443685  02ffec2c CHATSVC!CIrcUser::CommandMessage+0x701 02ffed44 00442f68  02ffedcc CHATSVC!CIrcUser::MessageInt+0x655 02ffed98 00442b58  02ffedcc CHATSVC!CIrcUser::Message+0x288 02fffdf0 00471d42  01d57050 CHATSVC!CIrcUser::Incoming+0x198 02ffff5c 00471674  00000000 CHATSVC!CSocket::IOCompletionRead+0x642 02ffff80 0047833c  00000000 CHATSVC!CSocket::IOCompletion+0x94 02ffffb0 0047837b  02ffffec CHATSVC!CService::ThreadPool+0x13c 02ffffb8 77f04f3e  01d4de5c CHATSVC!CService::ThreadPoolThunk+0xb 02ffffec 00000000  00000000 0x77f04f3e



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: Chat Service



STATUS
Microsoft has confirmed that this is a problem in the Microsoft Exchange Chat Service that isincluded with Microsoft Exchange Server version 5.5 Service Pack 2. This problem was first corrected in Exchange Server 5.5 Service Pack 3.



MORE INFORMATION
Most IRC and IRCX clients prohibit sending a zero byte whisper or privmsg but this problem can occur when you use Telnet. The problem can occur with any of the following functions:
 * PRIVMSG
 * NOTICE
 * WHISPER
 * DATA
 * REQUEST
 * REPLAY

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB217149

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