IT27944: IBM MQ classes for JMS throw a java.lang.NullPointerException from JmsProducerImpl

APAR status

• Closed as program error.

Error description

• An application creates a JMSContext, and then uses the
  JMSContext to create a JMSProducer for a destination. The
  JMSContext is closed. If the application then tries to send a
  message using the JMSProducer, the IBM MQ classes for JMS throw
  a java.lang.NullPointerException with the following stack:
  
  Exception in thread "main" java.lang.NullPointerException
  	at
  com.ibm.msg.client.jms.internal.JmsProducerImpl.updateInternalPr
  oducer(JmsProducerImpl.java:1868)
  	at
  com.ibm.msg.client.jms.internal.JmsProducerImpl.send(JmsProducer
  Impl.java:828)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects applications that use the JMS 2.0 API
  provided by the IBM MQ classes for JMS.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Every JMSProducer object created from an JMSContext has an
  internal "message producer" object.
  
  When a JMSContext was closed, the internal "message producer"
  objects associated with the JMSProducers created from the
  JMSContext was set to null. If an application then tried to use
  one of the JMSProducers to send a message, a
  java.lang.NullPointerException would be thrown as the MQ classes
  for JMS would try to use the "message producer" object that had
  been set to null.
  

Problem conclusion

• The IBM MQ classes for JMS have been updated so that, if a
  JMSContext is closed, the internal "message producer" object
  associated with any JMSProducers created from the JMSContext is
  no longer set to null. As a result of this, change, if an
  application then tries to use one of the JMSProducers to send a
  message, a JMSRuntimeException is thrown containing the message:
  
  JMSCC0026: This message producer is closed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0 LTS   9.0.0.7
  v9.1 CD    9.1.3
  v9.1 LTS   9.1.0.2
  
  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

  IBM MQ BASE M/P

• Fixed component ID

  5724H7261

Applicable component levels