IT47061: UNEXPECTED RESULTS WHEN USING THE XSLT TRANSFORM NODE AFTER 12.0.12.0

APAR status

• Closed as program error.

Error description

• There are 3 different XSLT engines available by default in App
  Connect Enterprise version 12 when running with the default Java
  8.0 JRE. These are:
  Xylem - IBM's high performance xslt engine
  Xalan  (Compiled) - Open source XSLT engine
  Xalan (Interpreted) - Open Source XSLT Interpreter
  
  By default the Xylem engine should be used however after
  12.0.12.0 the Xalan engine was used.
  
  
  There may be some changes in behaviour between the 2 engines,
  particularly with respect to anonymous namespaces.
  
  Additionally there was an existing environment variable
  MQSI_XSLT_USE_XALAN_PROCESSOR which allowed the user to select
  the Xalan processor in preference to the Xylem one. This did not
  work correctly on all fixpack levels.
  
  This APAR will correct the default behaviour such that Xylem is
  the default processor when using Java 8.0 and Xalan (Compiled)
  is the default processor when using Java 11 on ACE version 12 or
  Java 17 on ACE version 13.
  
  It will also correct the behaviour of the
  MQSI_XSLT_USE_XALAN_PROCESSOR environment variable.
  
  Additionally this APAR will add the new environment variable
  MQSI_XSLT_OVERRIDE_ENGINE this env var allows the user to set a
  specific engine name from the following selection:
  
  
  Xylem
  
  Xalan
  Interpreter
  
  Note that the Xylem engine is not compatible with Java version
  11 or higher so this engine is not available when the ACE
  runtime is not running in Java 8.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM App Connect Enterprise version 12 or higher
  using the XSLTransform Node
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  There are 3 different XSLT engines available by default in App
  Connect Enterprise version 12 when running with the Java
  8.0 JRE. These are:
  
  Xylem - IBM's high performance xslt engine
  Xalan  (Compiled) - Open source XSLT engine
  Xalan (Interpreted) - Open Source XSLT Interpreter
  
  By default the Xylem engine should be used however after
  12.0.12.0 the Xalan engine was used.
  
  There may be some changes in behaviour between the 2 engines,
  particularly with respect to anonymous namespaces.
  
  Additionally there was an existing environment variable
  MQSI_XSLT_USE_XALAN_PROCESSOR which allowed the user to select
   the Xalan processor in preference to the Xylem one. This did
  not work correctly on all fixpack levels.
  

Problem conclusion

• This APAR will correct the default behaviour such that Xylem is
  the default processor when using Java 8.0 and Xalan (Compiled)
  is the default processor when using Java 11 on ACE version 12 or
  Java 17 on ACE version 13.
  
  It will also correct the behaviour of the
  MQSI_XSLT_USE_XALAN_PROCESSOR environment variable.
  
  Additionally this APAR will add the new environment variable
  MQSI_XSLT_OVERRIDE_ENGINE this env var allows the user to set a
  specific engine name from the following selection:
  
  
  Xylem
  
  Xalan
  Interpreter
  
  Note that the Xylem engine is not compatible with Java version
   11 or higher so this engine is not available when the ACE
  runtime is not running in Java 8.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v12.0      12.0.12.8
  v13.0      13.0.2.0
  
  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:

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

Fix information

• Fixed component name

  APP CONNECT ENT

• Fixed component ID

  5724J0560

Applicable component levels