PM21181: ABEND SDC2 IN CONTROL REGION DURING STRESS TEST.

Fixes are available

APAR status

Closed as program error.

Error description

During a 300 transaction per second performance test, servant
region abend EC3, followed by control region abendDC2 SDC2 with
reason code 4F003F00.

Traceback from failing TCB is:
bbooorbx(bacb*,BBOO_ORBR_PC_FunctionCodes,...)
            +00000000              BBGBOA
ORB_Request::~ORB_Request()
            +00000A7C              BBGBOA
BBO_BOA::return_ORB_request(ORB_Request*)
            +00000074              BBGBOA
ORB_Request_Registry::cleanupSR_Terminated(MVS::ServantInsta
            +000019C0              BBGBOA
ACR_ExecutionThread::ProcessSrCleanup(acrwObj*)
            +000001B0              BBGBOA
ACR_ExecutionThread::RemoveAndProcessWork(ThreadCleanUp*)
            +00001CD8              BBGBOA
ACR_ExecutionRoutine
            +0000080C              BBGBOA
CELQPCMM    +00000F56              CELQLIB

Server is running in 64 bit mode.

Local fix

If the size of the message causing the SDC2 ABEND is
significantly less than 1 megabyte, the WebSphere runtime can
be tuned so that these messages will be stored below the bar
instead of above the bar.  Contact Level 2 for assistance.
                                                (z page)

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V6.1.0                               *
****************************************************************
* PROBLEM DESCRIPTION: ABENDDC2/ABENDSDC2 reason code 4F003F20 *
*                      was received in a WebSphere             *
*                      Application Server for z/OS controller. *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
A server running in 64 bit mode required above the bar
storage to represent pieces of the native construct for a
Request (ORB_Request).  On z/OS the IARV64 service is used for
obtaining above the bar storage.  The default ownership of the
storage is assigned to the current task.  If the owning task
terminates the storage will be freed.

There were 1-way requests being driven by DRS from the
controller on threads that could terminate prior to the request
completing its dispatch in the server's servants.  The storage
obtained above the bar was freed as part of the cleanup for the
task termination.  This caused the DC2 ABENDs as well as 0C4
ABENDs (in the servant) during the subsequent processing of the
request.

Problem conclusion

Code was added to the storage management code of the native
request (bbooorsx.mac) to assign the ownership of the obtained
storage to the main task.

APAR PM21181 is currently targeted for inclusion in
Service Level (Fix Pack) 6.1.0.35 of WebSphere Application
Server V6.1.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PM21181
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
2010-08-25
Closed date
2010-09-10
Last modified date
2011-01-04

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

PM21286

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK62676
UP10/12/17 P F012

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 October 2021

Tips

PM21181: ABEND SDC2 IN CONTROL REGION DURING STRESS TEST.

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R610 PSY UK62676

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

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