PM81177: Agent calls and the clear API both hang when the AvailabilityException exception is expected for XIO transport.

APAR status

• Closed as program error.

Error description

• In a WebSphere eXtreme Scale configuration using the XIO
  transport, the clear() API or an agent call can hang. In
  situations where the clear() API or agent call should fail
  with an AvailabilityException because the data grid is not in a
  state where work can be done, the activity loses the exception
  and hangs.
  
  The AvailabilityException is expected when normal client
  transactions are used and the data grid is offline or in
  preload state. The AvailabilityException can also be expected
  when client preload is attempted while the data grid is in any
  state other than the preload state.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  WebSphere eXtreme Scale customers with      *
  *                  applications that use the clear() API or    *
  *                  data grid agents in the same JVM as the     *
  *                  container server                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Agent calls or use of the clear API     *
  *                      can hang when AvailabilityException or  *
  *                      other exceptions occur.                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When running in the same JVM, a clear() API call or an agent
  call will continue to wait for results even though an
  exception condition like AvailabilityException happens.
  

Problem conclusion

• The clear() API or agent call returns the correct exception.
  

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