PM76918: DUMP TITLE=CSQ1, ABN=0C4-00000011, C=R3600.701.CHIN, M=CSQXDISP LOC=CSQXRCTL.CMQXRSTF+04AAC

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• While running along, the customer received the following
  abend:
  Dump Title=CSQ1,ABN=0C4-00000011,C=R3600.701.CHIN,M=CSQXDISP
  LOC=CSQXRCTL.CMQXRSTF+04AAC
  Abend 0c4 in CMQXRSTF+04AAC while updating statistics in
  function rstSendNotification for a channel.
  .
  The change team reviewed the doc for this and they can see the
  cause of the problem. It occurs when a MQCMD_INQUIRE_Q_NAMES
  PCF command is issued and there are a large number of queues
  defined (in this case over 2000).
  .
  The PCF response message returned by the queue-manager is
  incomplete (truncated). During data conversion processing the
  length of the message is set to the complete (untruncated)
  length. This causes the 0C4 in rstSendAsyncMessage when the
  MQCMD_INQUIRE_Q_NAMES PCF command originates from a
  client channel.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS version 7 *
  *                 Release 0 Modification 1 and Release 1       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: When not specifying                     *
  *                      MQCACF_COMMAND_SCOPE, corrupt or        *
  *                      incomplete data is returned when        *
  *                      putting PCF messages with               *
  *                      MQCMD_INQUIRE_*_NAMES commands on the   *
  *                      SYSTEM.COMMAND.INPUT queue and the      *
  *                      reply contains large numbers of         *
  *                      objects, causing the reply message to   *
  *                      contain more than 64Kb of data.         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The length field used to calculate the response message length
  is an unsigned 16 bit field, allowing for a maximum length of
  65535 bytes.
  When the reply is larger, the length field wraps around and an
  incomplete response message is generated.
  

Problem conclusion

• The code was changed to use 64 bit length fields for PCF
  responses to PCF messages with MQCMD_INQUIRE_*_NAMES, not
  specifying the MQCACF_COMMAND_SCOPE parameter,  that were put on
  the SYSTEM.COMMAND.INPUT queue.
  010Y
  100Y
  CSQFGENP
  CSQFSAMG
  CSQMDNAM
  CSQMDRTP
  CSQNRTS
  CSQ1SAMG
  CSQ9SCNP
  

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:

  UK91898 UK91899

Modules/Macros

•    CSQFGENP CSQFSAMG CSQMDNAM CSQMDRTP CSQNRTS
  CSQ1SAMG CSQ9SCNP
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK91898

     UP13/05/08 I 1000

• R100 PSY UK91899

     UP13/05/08 I 1000

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.