IT04971: DFDL EXPRESSIONS MAY FAIL WHEN SPECULATIVELY PARSING

APAR status

• Closed as program error.

Error description

• When DFDL parses a message and reaches a point of uncertainty,
  it will speculatively parse the message under the point of
  uncertainty. If any expressions in the schema make references
  to these elements then the expression will behave as if the
  element exists, even if that element was found not to exist.
  This can result in an expression returning an incorrect result.
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus V9.0 who use DFDL and define a
  message that uses expressions, where those expressions refer to
  elements that may not exist in a message.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When the product is parsing a message using DFDL and enters a
  point of uncertainty (such as a choice or an element with
  minOccurs=0), and finds an element that is referred to by an
  expression, the value of the element is stored for use by the
  expression.
  
  If the parser finds that the element does not exist, the value
  is still remembered. This may result in an expression returning
  an incorrect result.
  
  There are a number of resource name changes between WebSphere
  Message Broker and IBM Integration Bus Version 9.0. For details
  visit
  http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.e
  tools.mft.doc/bb23814_.htm
  

Problem conclusion

• The product now contains a version of the DFDL component where
  the issue has been fixed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0       9.0.0.3
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

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

  IT04966

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

Fix information

• Fixed component name

  INTEGRATION BUS

• Fixed component ID

  5724J0530

Applicable component levels

• R900 PSY

     UP