PI79678: WMQ IIB CONNECTION FAILS MQRC 2025 MQRC_MAX_CONNS_LIMIT_REACHED AFTER RRS FAILURE 17/05/23 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Change Team finds MQRC 2025 ( MQRC_MAX_CONNS_LIMIT_REACHED )
  is returned when IIB attempts to connect to MQ after an RRS
  failure. AMGSIDBC is being incorrected decremented for three
  AGNT control blocks obtained for indoubt URs returned by RRS.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: After application of PTF UI23984, batch *
  *                      applications and IBM Integration Bus    *
  *                      may fail to connect to MQ with the      *
  *                      MQCONN returning MQRC=2025              *
  *                      (MQRC_MAX_CONNS_LIMIT_REACHED) if RRS   *
  *                      is restarted and there are indoubt URs  *
  *                      present.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  APAR PI30141 changed the incrementing and decrementing of the
  internal counts of agents and corrected checks on these values.
  However in this scenario, the count is decremented due to the
  RRS restart but when the AGNT is created for the application
  connecting, the count is not incremented. This results in the
  check for this value failing, resulting in the
  MQRC_MAX_CONNS_LIMIT_REACHED.
  

Problem conclusion

• The logic during RRS restart has been changed, to not decrement
  the internal count in this case, which results in the bad MQRC.
  000Y
  CSQ3CT30
  CSQ3CT80
  CSQ3ID30
  CSQ3ID80
  CSQ3RRSR
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UI48026

Modules/Macros

• CSQ3CT30 CSQ3CT80 CSQ3ID30 CSQ3ID80 CSQ3RRSR
  

Fix information

• Fixed component name

  WMQ Z/OS 8

• Fixed component ID

  5655W9700

Applicable component levels

• R000 PSY UI48026

     UP17/07/25 P F707 ­

Fix is available

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