PM79700: MQRC 2082 MQRC_UNKNOWN_ALIAS_BASE_Q OPENING A QUEUE ALIAS POINTING TO A QLOCAL WITH QSGDISP SHARED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• 1)on QMA we :
  -  defined a Qlocal A with QSGDISP QMGR
   - defined a QALIAS having, as target queue,  the Qlocal A
  
  2)On QMB we defined a Qlocal A with QSGDISP SHARED.
  
  3)we delete from QMA the Qlocal A
  
  4)doing a display Qlocal A the shared queue A is only visible
  on QMB where has been defined
  
  5)on QMA we tried to open the Qalias and we got rc2082
  because the shared Qlocal A is not visible.
  
  6)if on QMA we opened the Qlocal A instead of alias , all
  is working fine RC0 from MQOPEN.  then we are able
  After that , even the open of the Qalias is working fine .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1 and Version 7       *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: MQRC_UNKNOWN_ALIAS_BASE_Q when a        *
  *                      private base queue is deleted, but a    *
  *                      shared base queue with the same name    *
  *                      is available.                           *
  *                      Also DISPLAY QSTATUS will not show      *
  *                      the new shared queue.                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The customer has a queue-sharing group (QSG). On one of the
  qmgrs in the group (QMA) they have a private queue (QUEUE1) with
  QSGDISP(QMGR) and a qalias pointing to it.
  They then define QUEUE1 on another qmgr in the group (QMB) but
  with QSGDISP(SHARED).
  On QMA a MQOPEN against the qalias opens the private QUEUE1 and
  messages are put to that queue as expected.
  The private QUEUE1 is then deleted from QMA.
  An MQOPEN of the qalias subsequently fails with RC 2082
  MQRC_UNKNOWN_ALIAS_BASE_Q. But if an open is done on QUEUE1
  the shared QUEUE1 is opened, and subsequent use of the qalias
  works.
  A DISPLAY QSTATUS of QUEUE1 will not show the shared queue on
  QMA, but it does appear on QMB where it was defined.
  The problem is due to the private QUEUE1 existing on QMA when
  the shared QUEUE1 is defined on QMB so no IVSA is created.
  

Problem conclusion

• CSQMOAQ1 has been altered to do locate with CSQI_CREATE_SQ_IVSA
  if it cannot open the base queue on the first attempt.
  CSQIDDEL has been altered to set the time from which to scan for
  new shared queues to when the qmgr was started.
  010Y
  100Y
  CSQIDDEL
  CSQMOAQ1
  

Temporary fix

Comments

• ×**** PE14/03/21 FIX IN ERROR. SEE APAR PI14223  FOR DESCRIPTION
  ×**** PE15/07/02 FIX IN ERROR. SEE APAR PI44165  FOR DESCRIPTION
  

APAR Information

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

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

  UK92932 UK92933

Modules/Macros

• CSQIDDEL CSQMOAQ1
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK92932

     UP13/05/08 P F305

• R100 PSY UK92933

     UP13/05/08 P F305

Fix is available

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