IC67225: AUTO RECONNECT IN WRONG STATE DURING SYNCHRONOUS GET OPERATION FORCING RECEIVE CALL INTO INFINITE LOOP INTERNALLY

WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.3
WebSphere MQ V7.0 Fix Pack 7.0.1.3

APAR status

• Closed as program error.

Error description

• After applying the fix for IC65324, the WebSphere MQ (WMQ) JMS
  client hangs while reconnecting to another queue manager in the
  connection name list. The issue occurs while doing a synchronous
  get operation using the MessageConsumer.receive() API.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of auto-reconnect feature of the
  WebSphere MQ v7.0.1 classes for Java Message Service (JMS).
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows) +Java
  ****************************************************************
  PROBLEM SUMMARY:
  When the WMQ queue manager is ended normally and
  the reconnect option is used, it sends a notification to the
  connected WMQ JMS clients to attempt a reconnect. The queue
  manager first enters into a quiescing state and then ends. The
  WMQ JMS client first sets the quiescing state flag and then
  attempts a reconnect. After the reconnect is successful this
  flag was not unset. This led to the infinite loop and a
  perception of a hang.
  

Problem conclusion

• The fix ensures that the appropriate state is set so that the
  WMQ JMS client reconnects and starts to send and receive
  messages. This requires the changes made in IC65324 as a
  pre-requisite.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.3
  --------           --------------------
  Windows            U200320
  AIX                U834987
  HP-UX (PA-RISC)    U834414
  HP-UX (Itanium)    U834413
  Solaris (SPARC)    U834986
  Solaris (x86-64)   U834210
  iSeries            tbc_p700_0_1_3
  Linux (x86)        U834415
  Linux (x86-64)     U834985
  Linux (zSeries)    U834412
  Linux (Power)      U835662
  
  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

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R700 PSY

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