PM90640: NullPointerException when the grid is restarted while apps remain active and classes are not present in classpath.

APAR status

• Closed as program error.

Error description

• Customer is getting NullPointerException when the grid is
  restarted while applications remain active and classes are not
  present in the server classpath. Object map
  SessionControlInterceptor corrupt stream header
  java.io.StreamCorruptedException: invalid stream header:
  01430400
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of WebSphere eXtreme Scale V8.6,      *
  *                  V8.6.0.1 and V8.6.0.2 running with IBM      *
  *                  eXtremeIO (XIO) and COPY_TO_BYTES copy      *
  *                  mode.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: A NullPointerException exception occurs *
  *                      when the data grid is restarted while   *
  *                      applications remain active and classes  *
  *                      are not in the server class path.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Primary and replica shards might be lost when you restart the
  data grid. When primary and replica shards are lost for the
  metadata map, active clients attempt to restore the metadata for
  the COPY_TO_BYTES maps in case other shards that contain user
  data still exist. ‚  
  During this metadata restoration, an exception occurs in some
  situations where the classes are not in the server class path. ‚
  Serialized objects might have missing metadata,
  which can result in a different errors depending on the
  sequence of events that lead up to the error. ‚   You might see
  ClassCastException exception if the serialized value is
  retrieved
  incorrectly into the wrong type. ‚   You might see an IOExceptio
  exception that refers to an unrecognized type message (
  CWOBJ6313E ). ‚  
  A NullPointerException exception might also be logged in the
  first-failure data capture (FFDC)
  files.
  

Problem conclusion

• A fix was made and the error no longer occurs.
  

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

• R860 PSY

     UP