DOCUMENT:Q282752 08-MAY-2002 [sna] TITLE :DEACTIVATE_SESSION Verb May Cause Snaservr.exe Hang PRODUCT :Microsoft SNA Server PROD/VER::4.0 SP3,4.0 SP4 OPER/SYS: KEYWORDS:kbDSupport kbsna400sp3 kbhis2000bug kbsna400sp4 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 4.0 SP3, 4.0 SP4 - Microsoft Host Integration Server 2000 ------------------------------------------------------------------------------- SYMPTOMS ======== The SNA Server service (Snaservr.exe) may exhibit one of the following symptoms when it receives a DEACTIVATE_SESSION verb from an Advanced Program-to-Program Communications (APPC) application: - High CPU (for example, 99% - 100%) use for the SNA Server (Snaservr.exe) process. -or- - SNA Server service stops responding (hangs) when terminating the APPC application that issued the DEACTIVATE_SESSION verb. CAUSE ===== If the SNA Server service receives a DEACTIVATE_SESSION (All Sessions) verb at the same time as an UNBIND request for one of the sessions that is being deactivated, the SNA Server service may experience one of the two problems described in the "Symptoms" session. If the DEACTIVATE_SESSION verb is received just prior to the UNBIND request, the SNA Server service will stop responding (hang). If the UNBIND request is received just prior to the DEACTIVATE_SESSION verb, the SNA Server service will show 100% CPU use. RESOLUTION ========== A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft SNA Server version 4.0 or Host Integration Server 2000 service pack that contains this fix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: SNA Server 4.0 +-------------------------------------+ | File name | Date | Time | +-------------------------------------+ | Snaservr.exe | 12/18/2000 | 09:00AM | +-------------------------------------+ NOTE: Because of file dependencies, the most recent fix that contains the above files may also contain additional files. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft SNA Server versions 4.0 Service Pack 3 (SP3), 4.0 Service Pack 4 (SP4), and Host Integration Server (HIS) 2000. MORE INFORMATION ================ For more information on the DEACTIVATE_SESSION and ACTIVATE_SESSION verbs, please refer to the APPC Programmer's Guide in the SNA Server 4.0 SP3 (or later) and Host Integration Server 2000 SDK. For additional information about these two APPC verbs, click the article numbers below to view the articles in the Microsoft Knowledge Base: Q195010 Activate_session/Deactivate_session Unavailable in SNA Server Q263096 ACTIVATE_SESSION Event Not Signaled When the Session Ends Q245966 Winmgt32.dll May Complete Same Verb Three Times Q279879 Problems with Processing Of Asynchronous CNOS and DISPLAY Verbs Q282461 DEACTIVATE_SESSION Returns Parameter_Check If No Sessions Are Active Additional query words: Snaservr sp3 sp4 service pack ====================================================================== Keywords : kbDSupport kbsna400sp3 kbhis2000bug kbsna400sp4 Technology : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ400SP3 kbSNAServ400SP4 Version : :4.0 SP3,4.0 SP4 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.