PK02889: 0C4 ABEND IN WEBSPHEREGETSTREAM OF THE HTTP PLUGIN UNDER HEAVY LOAD.

 A fix is available

Obtain the fix for this APAR



APAR status
Closed as program error.

Error description
During a period of heavy load, the HTTP plugin may take an
0C4 abend in websphereGetStream.  The program stack of the
abending thread will look similar to this:
.
websphereGetStream
websphereWriteRequestReadResponse
websphereRequestHandler
websphereHandleRequest
service_exit
ApiClassExecute
RedirectionOntheFly
HTHandle
HTSession
server_loop
.
Closer inspection of the failing instruction will also
possibly show an overlay in the LE SPILL area corrupting
the addresses of parameters passed to websphereGetSteam.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V5.0 for z/OS                                *
****************************************************************
* PROBLEM DESCRIPTION: With the System under stress the        *
*                      Customer encountered an                 *
*                      ABEND0C4/ABENDS0C4 with the WebSphere   *
*                      HTTP Plugin for z/OS v502               *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The default max sockets value 2048 used by the z/OS
select:FD_SET command is too small for this customer's
environment allowing a memory overlay which causes the
ABEND0C4/ABENDS0C4.
Problem conclusion
Changed the value of the max sockets value from the default of
2048 to 32767, this change applies to z/OS only. Also put a
check in place so that no attempt is made to use a socket number
greater than the max allowed socket.

APAR PK02889 is associated with SERVICE LEVEL W502028 of
WebSphere Application Server V5.0 for z/OS.
Temporary fix Comments
APAR information
APAR number PK02889
Reported component name WEBSPHERE FOR Z
Reported component ID 5655I3500
Reported release 500
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2005-03-22
Closed date 2005-04-15
Last modified date 2005-05-02

APAR is sysrouted FROM one or more of the following:
PK02883

APAR is sysrouted TO one or more of the following:

Modules/Macros
BBOUBINF          

Publications Referenced

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

Applicable component levels
R500 PSY UK02482    UP05/04/27 P F504

  Fix is available
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Document Information


Current web document: swg1PK02889.html
Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 500
Software edition:
Reference #: PK02889
IBM Group: Software Group
Modified date: May 2, 2005