IT28993: MQ 5.3 FOR HP-NSS: APPLICATION CANNOT RECONNECT TO QUEUE MANAGER AFTER CPU GOES DOWN - 2059 RC ON MQCONN RETRY

APAR status

• Closed as program error.

Error description

• Applications cannot reconnect to the queue manager after
  a CPU down in very rare cases at all. The error 2059 is
  reported on every MQCONN retry.
  .
  FDCs may be thrown constantly like below:
  .
   Probe Id          :- XY077002
   Component         :- xtrGetTraceLock
   Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
   Minor Errorcode   :- OK
   Probe Type        :- MSGAMQ6119
   Probe Severity    :- 2
   Probe Description :- AMQ6119: An internal WebSphere MQ
                        error has occurred (Guardian error
                        initializing Trace Lock)
   Arith1            :- 48 30
   Comment1          :- Guardian error initializing Trace Lock
   Comment2          :- FILE_OPEN_
   -----------------------------------------------------------
   MQM Function Stack
   MQCONN
   zstMQCONN
   xcsInitialize
   xcsFFST
  

Local fix

Problem summary

•  Applications cannot reconnect to the queue
  manager after a CPU down in rare cases at all. The
  error 2059 is reported on every MQCONN retry.
  The error is caused when the application is in the call MQDISC
  and at the same time a CPU down event is executed on the CPU
  of the primary disc process. The selected primary disc process
  is the one that operates on the file LnSTRACEX from the queue
  manager Guardian installation volume , which is also opened
  by the application (see PSTATE opened files).
  

Problem conclusion

•  CPU down handling has been improved.
  

Temporary fix

•  Restart the application that cannot reconnect.
  

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

  WEBS MQ NSS ITA

• Fixed component ID

  5724A3902

Applicable component levels