PI32277: WMQ Z/OS: GPF ABEND OCCURS AT COM/IBM/MQ/JMQI/LOCAL/INTERNAL/BASE/NATIVE.MQCONNX

APAR status

• Closed as duplicate of another APAR.

Error description

• When a WMB broker address space is using the MQ Java interface
  and a  queue manager which it has already been connected to
  becomes unavailable, a  residual value in the MQ Java native
  code can result in an MQ call  being made with an invalid hconn
  value. This causes in an attempt to access freed storage and
  the GPF abend occurs at below Java callstack:
  
  com/ibm/mq/jmqi/local/internal/base/Native.MQCONNX
  Native callstack:
  CSQBBspiSCTX+0xd1d68950 (0x0000000000000000)
  ResetContextFn+0xcfbd12d0 (0x0000000000000000)
  Java_com_ibm_mq_jmqi_local_internal_base_Native_MQCONNX+0xcfbd4
  568
  
  Additional Symptom(s) Search Keyword(s):
  

Local fix

• n/a
  

Problem summary

Problem conclusion

Temporary fix

Comments

• Problem summary:
  A WMB broker address space using the MQ Java Interface, has the
  queue manager it has already connected to become unavailable,
  a residual value in the MQ Java native interface code being used
  in a MQ call. This results in attempting to access freed storage
  resulting in a GPF abend in the following Java callstack:
  
     com/ibm/mq/jmqi/local/internal/base/Native.MQCONNX
     Native callstack:
     CSQBBspiSCTX+0xd1d68950 (0x0000000000000000)
     ResetContextFn+0xcfbd12d0 (0x0000000000000000)
     Java_com_ibm_mq_jmqi_local_internal_base_Native_MQCONNX+0xcfb
     d4568
  
  Problem resolution:
  The MQ Java native interface code has been altered to clear the
  residual values before MQ calls, so freed storage is not
  accessed for the WMB broker address space.
  
  This fix changes the Java component of MQ, and will be
  included in a FixPack APAR.
  
  The fix is targeted for delivery in the following PTFs:
  
  Version Maintenance Level
  v7.0 7.0.1.14 (PI34463 on z/OS)
  v7.1 7.1.0.7  (PI34462 on z/OS)
  v7.5 7.5.0.6  (Distributed platforms only)
  V8.0 8.0.0.3  (PI34470 on z/OS)
  Re
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  
  COMMENTS.41
  

APAR Information

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

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

Fix information

Applicable component levels