PH25081: IBM MQ WHEN USING A CHANNEL SECURITY EXIT IT IS POSSIBLE FOR MONCHL ATTRIBUTE TO BE UNINTENTIONALLY SET TO ZERO

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When using Security exits on a channel, it is possible for the
  MONCHL channel attribute to be unintentionally
  reset to zero, which disables the gathering of this value.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0 and Release 2       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: When using security exits on a channel, *
  *                      the MONCHL channel attribute may be     *
  *                      unintentionally reset to zero, which    *
  *                      disables collection of monitoring data. *
  ****************************************************************
  rriAcceptSecurityReceive is called for a SDR channel when a
  security exit performs a security exchange (MQXCC_SEND_SEC_MSG
  is set). Since on channel setup ResolvedMonChl is 0,
  ChannelMonitoring is also set to 0 before the exit is called.
  At the end of channel setup ccxChlMonSetSampleRate runs to set
  the channel monitoring rate, and because ChannelMonitoring is 0,
  ResolvedMonChl is left as 0, and channel monitoring is disabled,
  regardless of the desired value of the attribute.
  

Problem conclusion

• Channel monitoring now occurs earlier in channel setup so that
  it is not inadvertently reset.
  

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:

  UI73259 UI73260

Modules/Macros

• CMQXRMSA CSQXRMSS
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI73260

     UP21/01/28 P F101

• R200 PSY UI73259

     UP21/01/28 P F101

Fix is available

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