PK45276: AFTER A HEAVY HTTP WORKLOAD, WEBSPHERE APPLICATION SERVER FOR Z/OS MAY NOT STOP CLEANLY.

 Fixes are available

6.1.0.15 WebSphere Application Server V6.1 Fix Pack 15 for i5/OS
6.1.0.13 WebSphere Application Server V6.1 Fix Pack 13 for AIX
6.1.0.15 WebSphere Application Server V6.1 Fix Pack 15 for AIX
6.1.0.15: WebSphere Application Server V6.1 Fix Pack 15 for HP-UX
6.1.0.15: WebSphere Application Server V6.1 Fix Pack 15 for Windows
6.1.0.13: WebSphere Application Server V6.1 Fix Pack 13 for Windows
6.1.0.17 WebSphere Application Server V6.1 Fix Pack 17 for i5/OS
6.1.0.13: WebSphere Application Server V6.1 Fix Pack 13 for i5/OS
6.1.0.13: WebSphere Application Server V6.1 Fix Pack 13 for HP-UX
6.1.0.17: WebSphere Application Server V6.1 Fix Pack 17 for Linux
6.1.0.17: WebSphere Application Server V6.1 Fix Pack 17 for Solaris
6.1.0.17: WebSphere Application Server V6.1 Fix Pack 17 for HP-UX
6.1.0.17: WebSphere Application Server V6.1 Fix Pack 17 for Windows
6.1.0.17 WebSphere Application Server V6.1 Fix Pack 17 for AIX
6.1.0.13: WebSphere Application Server V6.1 Fix Pack 13 for Solaris
6.1.0.15: WebSphere Application Server V6.1 Fix Pack 15 for Linux
6.1.0.15: WebSphere Application Server V6.1 Fix Pack 15 for Solaris
6.1.0.11: WebSphere Application Server V6.1 Fix Pack 11 for HP-UX
6.1.0.11: WebSphere Application Server V6.1 Fix Pack 11 for Windows
6.1.0.11: WebSphere Application Server V6.1 Fix Pack 11 for Solaris
6.1.0.11: WebSphere Application Server V6.1 Fix Pack 11 for Linux
6.1.0.11: WebSphere Application Server V6.1 Fix Pack 11 for i5/OS
6.1.0.11 WebSphere Application Server V6.1 Fix Pack 11 for AIX
6.1.0.13: WebSphere Application Server V6.1 Fix Pack 13 for Linux
6.1.0.19 WebSphere Application Server V6.1 Fix Pack 19 for AIX
6.1.0.19: WebSphere Application Server V6.1 Fix Pack 19 for HP-UX
6.1.0.19 WebSphere Application Server V6.1 Fix Pack 19 for i5/OS
6.1.0.19: WebSphere Application Server V6.1 Fix Pack 19 for Linux
6.1.0.19: WebSphere Application Server V6.1 Fix Pack 19 for Solaris
6.1.0.19: WebSphere Application Server V6.1 Fix Pack 19 for Windows
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server



APAR status
Closed as program error.

Error description
The XMemChannel has a synchronization window in which an XMem
connection may get cleaned up prematurely and improperly.  (The
Java side is cleaned up, but the native counterpart is left in
limbo). Once this occurs, any attempt at stopping the server
will hang forever (the server must be manually killed).
Local fix Problem summary
****************************************************************
* USERS AFFECTED: Users of WebSphere Application Server for    *
*                 z/OS Version 6.1                             *
****************************************************************
* PROBLEM DESCRIPTION: Attempting to stop a WebSphere          *
*                      Application Server may hang after the   *
*                      server has handled a heavy HTTP         *
*                      workload.                               *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When running a heavy HTTP workload WebSphere may only partially
clean up from a successful HTTP reqeust.  Later, if an atttempt
is made to stop the server, the stop request will hang due to
the partial clean up of requests.  Something similar to the
following may be seen in the logs after the stop command hangs:

Trace: 2007/05/03 18:40:08.906 01 t=8B9A48 c=UNK key=S2
Description: traceORBR_Registry
ORB_Request Target Operation :  data_address=274d45f6,
+---------------------------------------------------------+
|OSet| Address = 274d45f6  Length = 000c |     EBCDIC     |
+----+-----------------------------------+----------------+
|0000|88A3A397 998598A4 85A2A300         |httprequest.    |
+---------------------------------------------------------+
Problem conclusion
WebSphere has been modified such that it will no longer
partially cleanup from HTTP requests when under heavy load
thus allowing the server to stop cleanly.

APAR PK45276 is currently targeted for inclusion in Service
Level (Fix Pack) 6.1.0.11 of WebSphere Application Server V6.1
for z/OS.
Temporary fix Comments
APAR information
APAR number PK45276
Reported component name WEBSPHERE FOR Z
Reported component ID 5655I3500
Reported release 610
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2007-05-15
Closed date 2007-07-17
Last modified date 2007-10-02

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
BBOXMEM          

Publications Referenced

Fix information
Fixed component name WEBSPHERE FOR Z
Fixed component ID 5655I3500

Applicable component levels
R500 PSN    UP
R601 PSN    UP
R610 PSY UK28841    UP07/09/18 P F709

  Fix is available
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Document Information


Current web document: swg1PK45276.html
Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 610
Software edition:
Reference #: PK45276
IBM Group: Software Group
Modified date: Oct 2, 2007