PI14232: Large-value objects stored in the data grid can cause object output streams to grow in size when running get operations.

APAR status

• Closed as program error.

Error description

• Out of memory errors and CPU starvation errors can occur that
  show a large amount of memory is being consumed in the heap by
  ReusableOutputStream objects. In the stream, a large Object[]
  and two int[] objects are displayed in a HandleTable
  field. These objects are using a lot of memory.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of WebSphere eXtreme Scale who use    *
  *                  the ORB transport and store value objects   *
  *                  that contain a large graph of objects.      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Serializing large-value objects         *
  *                      during read and write operations        *
  *                      causes the data grid to leak memory.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Object output streams are cached even when their handle tables
  grow to a large size.  The logic was updated to no longer
  cache objects, if their handle table grows above a threshold.
  

Problem conclusion

• An interim fix is available for this APAR.
  

Temporary fix

Comments

APAR Information

• 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

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R711 PSY

     UP

• R850 PSY

     UP

• R860 PSY

     UP