PM93892: WEBSPHERE MQ V701, CSQX007E CSQXRESP UNABLE TO CONNECT TO QUEUE MANAGER, MQCC=2 MQRC=2009

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An lpiSPINotify_BREAKCONN request may be sent by a client after
  the associated channel has ended and the channels's ACE is on
  the free-chain anchored from the MCLB. CSQMSNTF will still set
  ACESTOP even though the ACE has been freed. Another channel may
  be started and reuse this ACE. ACESTOP is not subsequently
  cleared, hence the an API request issued by this new channel
  will get CSQX007E.
  
  
  Additional Symptom(s) Search Keyword(s): CSQX007E, 2009
  

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: After starting a channel, the first     *
  *                      call made to the queue manager may      *
  *                      fail MQRC 2009, shown in message        *
  *                      CSQX007E in the channel initiator.      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the channel attempts to issue its first call to the queue
  manager after starting, the command may fail with MQRC 2009.
  This is shown by message CSQX007E in the channel initiator.
  
  This is due to the ACE associated to the channel when the
  channel starts. This ACE may be reused from a previous channel.
  The ACE has a flag that specifies if the ACE is for a channel
  that is stopping, this is cleared once the ACE is freed from
  a channel and put on the ace free chain. It is possible for
  this flag to be set again after the ACE has been put on the
  free chain. This causes the MQRC 2009 when the channel attempts
  to make a call to the queue manager, with the flag set on
  the ACE.
  

Problem conclusion

• The code has been changed to insure the flag on the ACE cannot
  be set after it has been cleared and put on to the free chain.
  010Y
  100Y
  CSQMCPRH
  

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:

  UK98050 UK98051

Modules/Macros

• CSQMCPRH
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK98050

     UP13/10/17 P F310 Ž

• R100 PSY UK98051

     UP13/10/16 P F310 Ž

Fix is available

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