IV46727: NULLPOINTEREXCEPTION THROWN ON REMOTE CONNECTION FROM A CLIENT WITH AUTOMATIC CLIENT RECONNECT ENABLED TO Z/OS QUEUE MANAGER

WebSphere MQ V7.0 Fix Pack 7.0.1.12

APAR status

• Closed as program error.

Error description

• WebSphere MQ Classes for JMS V7.0.1: A NullPointerException is
  thrown when a client application that has automatic client
  reconnection enabled attempts to create a remote connection to
  a Z/OS Queue Manager. The following exception is thrown:
  
  java.lang.NullPointerException
  at
  com.ibm.mq.jmqi.internal.JmqiTools.getQueueManagerInfo
  (JmqiTools.java:568)
  at
  com.ibm.mq.jmqi.remote.internal.RemoteHconn.loadInfo
  (RemoteHconn.java:2661)
  at
  com.ibm.mq.jmqi.remote.internal.RemoteHconn.getQsgName
  (RemoteHconn.java:2578)
  at
  com.ibm.msg.client.wmq.internal.WMQConnection.<init>
  (WMQConnection.java:542)
  at
  com.ibm.msg.client.wmq.factories.WMQConnectionFactory.createV7Pr
  oviderConnection(WMQConnectionFactory.java:7192)
  at
  com.ibm.msg.client.wmq.factories.WMQConnectionFactory.createProv
  iderConnection(WMQConnectionFactory.java:6583)
  at
  com.ibm.msg.client.jms.admin.JmsConnectionFactoryImpl.createConn
  ection(JmsConnectionFactoryImpl.java:295)
  at
  com.ibm.mq.jms.MQConnectionFactory.createCommonConnection
  (MQConnectionFactory.java:6232)
  at
  com.ibm.mq.jms.MQQueueConnectionFactory.createQueueConnection
  (MQQueueConnectionFactory.java:115)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of the WebSphere MQ V7.0.1.9 Classes
  for JMS (or later) who have enabled automatic client reconnect
  and are attempting to establish a remote connection to a z/OS
  Queue Manager.
  
  This includes users of:
  
  - The WebSphere MQ V7.0.1 Classes for JMS.
  - The WebSphere MQ V7.0.1 Resource Adapter.
  - The WebSphere Application Server V7.0 and V8.0 WebSphere MQ
  messaging provider.
  - The WebSphere Application Server V6.1 WebSphere MQ messaging
  provider who have configured the WebSphere variable
  MQ_INSTALL_ROOT to point to a WebSphere MQ V7.0.1
  installation.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows) +Java +Java zOS
  ****************************************************************
  PROBLEM SUMMARY:
  As part of the call to create a connection to the Queue Manager
  the WebSphere MQ classes for JMS query a number of properties/
  values from
  the Queue Manager and store them away for further use later on
  in the
  connection process.
  
  When automatic client reconnection was enabled and the client
  attempted to retrieve the Queue Sharing Group Name (qsgName) the
  WebSphere MQ Classes for JMS attempted to query the queue
  manager
  using an invalid connection handle (HCONN). This resulted in the
  NullPointerException being thrown.
  

Problem conclusion

• The WebSphere MQ Classes for JMS no longer use the invalid
  connection handle. The Queue Sharing Group Name is now retrieved
  using the correct connection handle (HCONN).
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.0       7.0.1.12
  
  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:

  PM93940

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

Fix information

• Fixed component name

  WMQ AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R710 PSY

     UP