PM68498: APPLICATIONS DEPLOYED WITHOUT A CUSTOM CLASSLOADER ELEMENT ARE I NCORRECTLY ABLE TO ACCESS CLASSES FROM THE LIBERTY PROFILE RUNTI

8.5.0.1: WebSphere Application Server V8.5 Fix Pack 1
8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2

APAR status

• Closed as program error.

Error description

• Applications without a custom classloader have unexpected
  dependencies due to being able to incorrectly resolve and use
  packages outside of the default visibility, ibm-api and spec.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile without a            *
  *                  classloader element specified for the       *
  *                  application.                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: Applications deployed without a         *
  *                      custom classloader are incorrectly      *
  *                      able to access packages from the        *
  *                      Liberty profile runtime.                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Applications running without a custom classloader
  configuration (the default) will find themselves able to
  resolve and use packages outside of the default visibility
  (ibm-api & spec). This is not normal, and could result in an
  application being developed with unexpected dependencies.
  The most commonly seen scenario is the resolution to the SLF4J
  packages shipped with the Liberty Profile rather than those
  users place within their application.
  

Problem conclusion

• The error preventing the application of restrictions in the
  default case was remedied, by ensuring that the information
  required for them to become active is always added, rather
  than being added conditionally, where some sub cases omitted
  the enabling of the restrictions in error.
  
  
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.0.1. 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:

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

Fix information

• Fixed component name

  LIBERTY PROFILE

• Fixed component ID

  5724J0814

Applicable component levels

• R850 PSY

     UP