IV14091: WMQ V6 CLASSES FOR JMS APPLICATION ATTEMPT TO SEND A MESSAGE TO A WMQ QUEUE AND RECEIVES A JAVA JAVA.LANG.CLASSCASTEXCEPTION

WebSphere MQ V6.0 Fix Pack 6.0.2.12
WebSphere MQ V6.0 for iSeries Fix Pack 6.0.2.12
WebSphere MQ 6.0 for HP OpenVMS Alpha and Itanium - Fix Pack 6.0.2.12

APAR status

• Closed as program error.

Error description

• A WebSphere MQ classes for JMS application was using the
  WebSphere MQ V6.0.2.1 classes for JMS to send JMS messages
  which had originated from non-WebSphere MQ JMS provider, which
  was working without fault.
  
  The WebSphere MQ classes for JMS was upgraded to version
  6.0.2.9, and then when the JMS application attempted to send a
  message to the WebSphere MQ queue, it received the following
  'ClassCastException' exception:
  
  java.lang.ClassCastException: progress.message.jimpl.Queue
  at com.ibm.mq.jms.MQJMSMessage.setHeaderFromMQMD(MQJMSMessage
  .java:985)
  at com.ibm.mq.jms.MQMessageProducer.sendInternal(MQMessagePro
  ducer.java:1813)
  at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.ja
  va:1139)
  at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.ja
  va:1215)
  
  and the message was not sent to the WebSphere MQ queue.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This problem affects users of WebSphere MQ V6 classes for JMS,
  who are sending messages to WebSphere MQ which have originated
  from a non-WebSphere MQ JMS provider, and the JMSReplyToQueue
  is populated with a non-WebSphere MQ formatted value.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows) +Java +Java zOS
  ****************************************************************
  PROBLEM SUMMARY:
  When the WebSphere MQ V6 classes for JMS sends a message to a
  WebSphere MQ queue, it attempts to populate the the fields of
  the WebSphere MQ message with values from the JMS message.
  
  One of these fields is the JMQReplyTo field, which provides
  JMS provider specific data about a JMS Destination.
  
  APAR IZ15279:
  
  http://www.ibm.com/support/docview.wss?uid=swg1IZ15279
  
  introduced a code change which was included in WebSphere MQ
  v6.0.2.4 classes for JMS such that if the ReplyToQmgr name was
  not specified on the JMS message, the ReplyToQmgr name was
  populated with the local queue manager name when sending a
  message to the WebSphere MQ queue.
  
  This code change involved the casting of the JMSReplyTo field
  to a "MQQueue" object, which resulted in a ClassCastException
  if the JMSReplyTo field had not originated from the WebSphere
  MQ messaging provider, for example where JMS message had been
  consumed from a non-IBM JMS messaging provider before the
  attempt was made to send it to WebSphere MQ.
  

Problem conclusion

• The WebSphere MQ classes for JMS has been changed to prevent the
  ClassCastException from occurring when a message does not have
  a WebSphere MQ compatible JMSReplyTo value.
  
  This permits the WebSphere MQ v6 classes for JMS to once again
  send messages to WebSphere MQ queues where the message has
  originated from a non-WebSphere MQ messaging provider.
  
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v6.0
  Platform           Fix Pack 6.0.2.12
  --------           --------------------
  Windows            U200331
  AIX                U842074
  HP-UX (PA-RISC)    U842208
  HP-UX (Itanium)    U842213
  Solaris (SPARC)    U842209
  Solaris (x86-64)   U842216
  iSeries            tbc_p600_0_2_12
  Linux (x86)        U842210
  Linux (x86-64)     U842215
  Linux (zSeries)    U842211
  Linux (Power)      U842212
  Linux (s390x)      U842214
  
  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 LIN X86 V6

• Fixed component ID

  5724H7204

Applicable component levels

• R602 PSY

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