PH24366: LIBERTY FAILS TO REMOVE THE CLIENT ADDRESS SPACE LEVEL RESMGRS WHEN CLEANING UP LIBERTY'S CLIENT STRUCTURES

APAR status

• Closed as program error.

Error description

• Customer noticed that *MASTER* was suddenly using an
  extensive
  amount of CPU.  Analysis of a stand alone dump revealed that
  the
  CPUs were tight looping in the Liberty Angel module
  BBGZAFSM.
  The loop was identified on one instruction 05EF with R15
  pointing back to the start of the same instruction.
  

Local fix

• Ensure all client address spaces that were connected to the
  Angel are stopped before the Angel is restarted again.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty for z/OS                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Liberty on z/OS is not deleting Client  *
  *                      address space level RESMGRs             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Code is missing during the client side cleanup of structures
  related to using OLA.  The missing code is to delete an
  established address space level RESMGR.   If the usage pattern
  of OLA for the client is in a long lived address space, such as
  a batch initiator or a CICS region, these RESMGRs can build up
  over time.   There is a small amount of Common storage related
  to each established RESMGR.
  
  It has been observed in a customer scenario where over 100
  outstanding RESMGRs were present when the address space went
  though EOM termination.
  

Problem conclusion

• Code has been added during the client side cleanup of data
  structures to delete the established address space level
  RESMGR.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 20.0.0.5.  Please refer to the Recommended Updates page for
  delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  LIBERTY PROF -

• Fixed component ID

  5655W6514

Applicable component levels