IT40838: MQ client unable to connect to an IBM MQ version 8.0 or later queue manager when using SSPI security exit

APAR status

• Closed as program error.

Error description

• MQ Client  is unable to connect to an IBM MQ
  version 8.0 or later queue manager which uses
  64-bit amqrspin.dll that comes with IBM MQ.
  
  FDCs with probe ID "XC130031 xehExceptionHandler" is cut.
  
  An Unhandled Exception detected in process 4300, on thread
  0x15F0.
  Type: EXCEPTION_ACCESS_VIOLATION (C0000005).
  Address: 0033:00007FFA7D9327E8.
  The thread could not read from memory address
  0xFFFFFFFFFFFFFFFF.
  
  MQM Function Stack
  MQCONNX
  MQCONNX
  trmzstMQCONNX
  reqDoConnect
  reqConnectChl
  reqFreeConnSess
  reqFreeSess
  rriFreeSess
  rriTermExits
  rriTermExit
  rriCALL_EXIT
  xcsFFST
  
  Stack Backtrace:
  Module!Function+Offset
  amqrspin!terminateSecurityExit+0xf8
  amqrspin!SSPI+0x409
  amqrspin!SCY_KERBEROS+0x13d [c:\cygwin64\b
  mqe!rriTermExit+0x9c5
  mqe!rriTermExits+0xbe0
  mqe!rriFreeSess+0xee8
  mqe!reqFreeSess+0x3db
  mqe!reqFreeConnSess+0x499
  mqe!reqConnectChl+0x18cd
  mqe!reqDoConnect+0x1644
  mqe!rreqMQCONNX+0x282
  mqe!tmzstMQCONNX+0x8f4
  mqe!reqMQCONNX+0x7d
  mqe!MQCONNX_Client_Call+0x153
  mqe!zswMQCONNX_Client_Call+0x33a
  mqic!MQCONNX+0x4c
  amqsputc!main+0x124c
  amqsputc!__tmainCRTStartup+0x19d
  amqsputc!mainCRTStartup+0xe
  KERNEL32!BaseThreadInitThunk+0x14<NLN:487>
  ntdll!RtlUserThreadStart+0x21<NLN:487>
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using SSPI security exit
  
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  From MQ server version 8.0 or later Windows queue manager runs
  64-bit processes. Queue manager exits on Windows 64-bit must be
  compiled as 64-bit. When using 64-bit amqrspin.dll with the
  queue manager/client, a structure used in exit causes a null
  pointer in initSecContext or terminateSecurityExit method.
  

Problem conclusion

• The amqrspin sample code has been changed so that the structure
  used in the 64 bit amqrspin.dll is consistent with the one
  expected by MQ Client/Server code.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.7
  v9.3 LTS   9.3.0.2
  v9.x CD    9.3.2
  
  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
  ---------------------------------------------------------------
  

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:

Fix information

• Fixed component name

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels