PM11492: ESQA SUBPOOL 239 STORAGE GROWTH WITH SSD EYECATCHER CAUSED BY WEBSPHERE Z/OS ALLOCATING PAUSE ELEMENTS THAT ARE NOT FREED.

Fixes are available

APAR status

Closed as program error.

Error description

Storage growth is observed in subpool 239 ESQA. The storage
contained SSD eyecatchers. SSDs are "suspended service
descriptors" obtained for PAUSE/RELEASE in this case. The VSM
OWNCOMM data indicated that the SSDs were being getmained by a
PSW in IEAVSRBO. Also, the SSDs were being allocated via
repeated IEAVAPE invocations. IEAVAPE is a pause element macro.

This is caused by WebSphere for z/OS allocating pause elements
that are not being freed. This apar will address this issue.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application Server
*                  V6.1.0                                      *
****************************************************************
* PROBLEM DESCRIPTION: ESQA storage fills up with SSD blocks   *
*                      because pause elements are being        *
*                      allocated but not freed.                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
WebSphere Application Server for z/OS servants do not deallocate
pause elements when a thread ends. For each pause element there
is a control block in ESQA subpool 239. The control block
contains an eyecatcher. The eyecatcher is SSD.

example of storage that is leaked:
01B90000  E2E2C440  00000000  01B90048  00F59000
                                          | SSD .........5.. |
01B90010  80CBD29C  01000000  00000000  A0000000
                                          | ..K............. |
01B90020  00000000  027C4A00  00000000  00000000
                                          | .....@?......... |
01B90030.:01B9003F. LENGTH(X'10')--All bytes contain X'00'

Problem conclusion

Updated the code to deallocate the pause element when a thread
ends.

APAR PK11492 is currently targeted for inclusion in Service
Level (Fix Pack) 6.1.0.33 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
PM11492
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
2010-04-02
Closed date
2010-06-07
Last modified date
2010-10-02

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

PM11579

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R610 PSY UK59848
UP10/09/11 P F009

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:
25 October 2021

Tips

PM11492: ESQA SUBPOOL 239 STORAGE GROWTH WITH SSD EYECATCHER CAUSED BY WEBSPHERE Z/OS ALLOCATING PAUSE ELEMENTS THAT ARE NOT FREED.

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 UK59848

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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