PI36469: WMQ DISPLAY CHSTATUS RETURNS SUBSTANTIALLY LARGE NETTIME VALUES WHEN ISSUED ON DISTRIBUTED SENDER CHANNELS THAT CONNECT TO Z/OS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• DISPLAY CHSTATUS was issued on queue managers (x86 Linux and
  Windows) for SENDER and CLUSSDR channels connecting to a z/OS
  QMGR instance. This returned substantially high values for
  NETTIME for idle channels (where only HEARTBEAT flows were being
  passed) but also on channels where active messaging was being
  done. Level 3 analysis finds rriReceiveData should be resetting
  rfpTCF2_CMIT_INTERVAL on the rfpTST_HEARTBEAT reply.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When a sender channel on a distributed  *
  *                      queue manager is connected to a         *
  *                      receiver channel on a z/OS queue        *
  *                      manager, the NETTIME for the channel    *
  *                      shows an unexpectedly high value when   *
  *                      heartbeating is enabled.                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a receiver channel on the z/OS queue manager receives a
  heartbeat, which has the rfpTCF2_CMIT_INTERVAL flag set. In this
  case, a commit interval is now supplied for the heartbeat reply
  back to the distributed queue manager, while leaving the flag
  set. This results in the first 4 bytes of the returned LUWID
  being used as the commit interval, which results in an
  unexpectedly high calculated NETTIME value.
  

Problem conclusion

• The flag has been cleared on the heartbeat reply. This results
  in the commit interval not being used, and the NETTIME not
  being miscalculated.
  100Y
  CSQXRMTR
  

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:

  PI36564 PI38518 UI27027

Modules/Macros

• CSQXRMTR
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI27027

     UP15/06/03 P F506

Fix is available

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