PM94418: WMQ V7.1 USING PUB/SUB, PUBLICATIONS ARE FAILING.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• With WMQ V7.1 using pub/sub, publications are failing.
  The error message indicates that a subscription existed
  that WMQ did not know how to parse.
  These subscriptions utilize message selectors to filter
  which messages it should receive.
  .
  Additional keywords:
  MQRC_SELECTION_NOT_AVAILABLE
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: After defining a subscriber with        *
  *                      extended selection SELTYPE(EXTENDED),   *
  *                      publishing to a topic matched by that   *
  *                      subscriber fails                        *
  *                      MQRC_SELECTION_NOT_AVAILABLE, and no    *
  *                      subscriptions receive the publication,  *
  *                      if the extended message selection       *
  *                      provider is not available.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a message is published to a topic with one or more
  SELTYPE(EXTENDED) subscriptions associated with it, the queue
  manager requests that the extended message selection provider
  parses the publication message and evaluates whether it matches
  the subscribers' selectors. If the extended message selection
  provider is not available, the queue manager cannot determine if
  the message should be delivered or not, and fails the publish
  with MQRC_SELECTION_NOT_AVAILABLE.
  This can lead to the situation where existing working
  subscribers can stop receiving messages due to a new subscriber
  that requires extended message selection being defined.
  
  This behaviour is correct and working as designed, however in
  some situations it can be desirable that any other subscribers
  that do not require extended message selection should still
  receive the message.
  

Problem conclusion

• A service parameter is added that causes
  MQRC_SELECTION_NOT_AVAILABLE to be treated as a failure to
  deliver to subscribers requiring extended message selection,
  rather than a failure of the overall publish operation.
  When enabled the success or failure of the overall publish
  operation when extended message selection is required by one
  or more subscribers, and the extended message selection
  provider is not available will depend on the NPMSGDLV and
  PMSGDLV attributes of the topic being published to, and (if
  appropriate) whether the subscribers are durable, in the same
  way as failures to deliver to a subscriber for other reasons
  (for example MQRC_Q_FULL) are currently handled.
  
  The service parameter should only be enabled under guidance
  from IBM support personnel.
  100Y
  CSQMTPUT
  

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:

  UK98405

Modules/Macros

• CSQMTPUT
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UK98405

     UP13/11/20 P F311

Fix is available

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