PM47594: IF AN EXTENSION FUNCTION THROWS AN EXCEPTION, NULL REFERENCES ARE PASSED AS THE MESSAGE AND THROWABLE TO ANY XMESSAGEHANDLER

8.0.0.2: WebSphere Application Server V8.0 Fix Pack 2
8.0.0.3: WebSphere Application Server V8.0 Fix Pack 3
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• If a user-defined extension function that was invoked in an
  XSLT stylesheet, or an XQuery or XPath expression throws an
  exception, the report method of any user-supplied
  implementation of the com.ibm.xml.xapi.XMessageHandler are
  invoked.  However, the "message" argument of type
  java.lang.String and the "cause" argument of type
  java.lang.Throwable passed to the report method are null
  references.  This makes it difficult to diagnose the cause of
  the exception.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.0                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: If an Exception or Error is thrown      *
  *                      from a user-defined extension           *
  *                      function called from an XSLT            *
  *                      stylesheet or and XQuery or XPath       *
  *                      expression, a null reference is         *
  *                      passed to any installed                 *
  *                      XMessageHandler in the positions of     *
  *                      the message text and Throwable cause    *
  *                      arguments to the                        *
  *                      XMessageHandle.report method.           *
  ****************************************************************
  * RECOMMENDATION:  Install a fix pack that contains this       *
  *                  APAR.                                       *
  ****************************************************************
  Internally, the processor is extracting the message from any
  Throwable thrown by a user-defined extension function, and
  passes that as the message text to the XMessageHandler's
  report method, and does not pass the Throwable itself.  In
  many cases, the Throwable object has a null reference for the
  message, and so both the message text and Throwable reference
  passed to the report method are null in such cases.
  

Problem conclusion

• The problem was resolved by ensuring that, for any Throwable
  object that it catches from calling the implementation of a
  user-defined extension function, the processor passes that
  object to the report method of any installed XMessageHandler
  object, along with any message text that the Throwable object
  contained.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.0.0.2.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

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

  PM43005

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

Fix information

• Fixed component name

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R800 PSY

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