IT25689: MQ NONSTOP PROBE ID ZC064002 FROM COMPONENT ZCGPROCESSCLOSEIPC ERROR 4022

APAR status

• Closed as program error.

Error description

• When a CLOSE message is overtaken by a CPU DOWN message
  the cleanup done as a reaction to the CLOSE will fail
  since the data it tries to access is not valid anymore,
  resulting in error 4022 when trying to lock a mutex.
  When a CPU fails that contains MQ queue manager processes,
  internal connections to those processes, are not properly
  released and cleaned up.  Other MQ processes suffer errors
  performing Guardian process I/O.  FDC shows-
  
  Probe Id          :- ZC064002
  Component         :- zcgProcessCloseIPC
  Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
  Probe Description :- AMQ6119: An internal WebSphere MQ error
  has occurred
  ('4022 - Invalid function argument' from pthread_mutex_lock.)
  Arith1            :- 4022 fb6
  Comment1          :- '4022 - Invalid function argument' from
   pthread_mutex_lock.
  

Local fix

Problem summary

• When a CPU fails that contains MQ queue manager processes,
  internal connections to those processes, are not properly
  released and cleaned up. Other MQ processes suffer errors
  performing Guardian process I/O and emit FFST's.
  

Problem conclusion

• The IPCC component within MQ that manages communications
  between MQ processes has been revised to properly cleanup
  internal connections to missing processes, which allows
  them to handle and report the condition gracefully.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IT25677

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MQ FOR HPE NS O

• Fixed component ID

  5724A3903

Applicable component levels