PM11579: ESQA SUBPOOL 239 STORAGE GROWTH WITH SSD EYECATCHER CAUSED BY WEBSPHERE Z/OS ALLOCATING PAUSE ELEMENTS THAT ARE NOT FREED.

Obtain the fix for this APAR.

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 V7.0                                 *
  ****************************************************************
  * 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 PM11579 is currently targeted for inclusion in Service
  Level (Fix Pack) 7.0.0.13 of WebSphere Application Server V7.0.
  
  Please refer to URL:
  //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack availability.
  

Temporary fix

Comments

APAR Information

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

  PM11492

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

Fix information

• Fixed component name

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R700 PSY UK61114

     UP10/10/21 P F010

Fix is available

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