PM52894: 701 BACKWARDS MIGRATION FROM 710 AND COEXISTENCE WITH 710

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• Allow a V701 queue-manager backwards migration from V710, and
  coexistence with a V710 queue-manager in a queue-sharing group.
  .
  Additional keywords:
  MQ0710C/K
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Enable backward migration to version    *
  *                      7.0.1 after a queue manager has been    *
  *                      started with version 7.1.0 code.        *
  *                                                              *
  *                      Enable version 7.0.1 and version 7.1.0  *
  *                      queue managers to coexist in a queue    *
  *                      sharing group.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  PTFs for the backward migration APAR must be applied on version
  7.0.1 prior to attempting fallback from WebSphere MQ for z/OS
  version 7.1.0.
  
  Attempting to restart a queue manager, which has been run with
  version 7.1.0 libraries, at version 7.0.1 without this PTF will
  result in abnormal termination of the queue manager with reason
  code 00C90D01.
  
  When reverting to Version 7.0.1 after running a queue manager at
  version 7.1.0 the following should be considered.
  
  - It will NOT be possible to backwards migrate to V701 from V710
    if the new functions available in V710 have been activated by
    the OPMODE parameter. Refer to the WebSphere MQ Version 7.1
    infocenter section b
    manager to version 7.0.1b
  
  - If V710 has been started with OPMODE=NEWFUNC then any attempt
    to restart the queue manager at V701 will result in abnormal
    termination of the queue manager with reason code 00C90D01.
  
  - CHLAUTH objects are stored on the SYSTEM.CHLAUTH.DATA.QUEUE.
    They will not be visible at V701 but will reappear when the
    queue manager is subsequently restarted at V710
  
  - New object attributes introduced in V710 will not be present
    in V701, and when you subsequently migrate to V710 they will
    be reset to default values.
  
  - If the queue manager is a cluster repository queue manager,
    then after backward migration, any other V710 queue managers
    in the cluster will not receive information about new V710
    attributes on clustered queues, topics and queue managers from
    this full repository.
  
  - If you are using the MQ Explorer to administer your queue
    manager then after migration between releases the following
    Explorer actions must be performed:
    o Remove the migrated z/OS queue manager
    o Add Remote Queue Manager
  
  This APAR also provides coexistence aspects when migrating queue
  sharing groups to V710.
  
  The coexistence aspects of this APAR allow a V701 queue manager
  in a queue sharing group to handle DISPLAY command responses
  from a V710 queue manager that contain new attributes that exist
  only in V710.
  .
  Following the application of the PTF for this APAR, the queue
  manager must be restarted if coexistence with any V710 queue
  managers in the same QSG is required.
  .
  

Problem conclusion

Temporary fix

Comments

• ×**** PE12/11/26 FIX IN ERROR. SEE APAR PM72079  FOR DESCRIPTION
  

APAR Information

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

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

  UK76760

Modules/Macros

• CMQXZMUC CSQECONN CSQIDPUT CSQIECUR CSQIERS3
  CSQIMGEK CSQMCNSB CSQMNMMS CSQMQDEF CSQOKYTB CSQORINI CSQOXATR
  CSQUDEFS CSQUXPRM CSQXRFIC CSQ45BPL CSQ45GEX CSQ5AUOB CSQ5PLNU
  CSQ5PQSG CSQ5READ CSQ5UPDT CSQ5U701
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK76760

     UP12/03/22 P F203

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.