PM22942: WHEN USING THE COPY_TO_BYTES COPYMODE, ARRAYINDEXOUTOFBOUNDSEXCE PTION CAN HAPPEN DURING A GET OPERATION.

PM22469; 7.1.0: Cumulative fix 1 for eXtreme Scale version 7.1

APAR status

• Closed as program error.

Error description

• Description: If many different class types being put into a
  Grid's maps with COPY_TO_BYTES CopyMode, an
  ArrayIndexOutOfBoundsException can occur when deserializing
  values.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of WebSphere eXtreme Scale that   *
  *                  are using the COPY_TO_BYTES CopyMode.       *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: When CopyMode is set to COPY_TO_BYTES   *
  *                      an ArrayIndexOutOfBoundsException       *
  *                      exception is logged during remote       *
  *                      transactions.                           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following exception is logged when a get or getForUpdate
  method is called on ObjectMap API.
  
  com.ibm.websphere.objectgrid.ObjectGridRuntimeException:
  java.lang.ArrayIndexOutOfBoundsException: Array index out of
  range:
      at
  com.ibm.ws.objectgrid.map.BaseMap.bytesToObject(BaseMap.java:967
  3)
      at
  com.ibm.ws.objectgrid.map.BaseMap.getValueCopyForTransaction(Bas
  eMap.java:3868)
      at
  com.ibm.ws.objectgrid.DiffMapValue.getCurrentValue(DiffMapValue.
  java:402)
      at com.ibm.ws.objectgrid.DiffMap.get(DiffMap.java:718)
      at
  com.ibm.ws.objectgrid.ObjectMapImpl.get(ObjectMapImpl.java:424)
      at
  com.ibm.ws.objectgrid.ObjectMapImpl.getForUpdate(ObjectMapImpl.j
  ava:568)
  Caused by: java.lang.ArrayIndexOutOfBoundsException: Array
  index out of range:
      at
  com.ibm.ws.objectgrid.plugins.SerializationInfoCacheImpl.lookupB
  yIndex(SerializationInfoCacheImpl.java:130)
      at
  com.ibm.ws.objectgrid.map.BaseMap.bytesToObject(BaseMap.java:962
  3)
  

Problem conclusion

• A future cumulative fix will correct the problem for WebSphere
  eXtreme Scale Version 7.0 and Version 7.1
  

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

  XD EXTREME SCAL

• Fixed component ID

  5724J3402

Applicable component levels

• R700 PSY

     UP

• R710 PSY

     UP