PM80589: JAVA.LANG.CLASSCASTEXCEPTION AFTER AN APPLICATION RESTART

8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2

APAR status

• Closed as program error.

Error description

• A ClassCastException occurs after an application restart
  because WebSphere Application Server continues to hold
  references to the application.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Version    *
  *                  8.5 Libery Profile users of JavaServer      *
  *                  Faces                                       *
  *                  (JSF) MyFaces.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: After an application restart a          *
  *                      ClassCastException can occur.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An example of the exception is:
  Caused by: java.lang.ClassCastException:
  org.apache.myfaces.extensions.validator.core.storage.DefaultRend
  ererInterceptorPropertyStorage incompatible with
  org.apache.myfaces.extensions.validator.core.storage.RendererInt
  erceptorPropertyStorage
  at
  org.apache.myfaces.extensions.validator.core.interceptor.Abstrac
  tValidationInterceptor.getRendererInterceptorPropertyStorage(Abs
  tractValidationInterceptor.java:477)
  at
  org.apache.myfaces.extensions.validator.core.interceptor.Abstrac
  tValidationInterceptor.setRendererInterceptorProperties(Abstract
  ValidationInterceptor.java:456)
  at
  org.apache.myfaces.extensions.validator.core.interceptor.Abstrac
  tValidationInterceptor.beforeGetConvertedValue(AbstractValidatio
  nInterceptor.java:166)
  at
  org.apache.myfaces.extensions.validator.core.renderkit.ExtValRen
  dererWrapper.getConvertedValue(ExtValRendererWrapper.java:361)
  at
  javax.faces.component.UIViewParameter.getConvertedValue(UIViewPa
  rameter.java:248)
  The exception occurred because the
  javax.faces.component.UIViewParameter.java class was holding
  on to its renderer because it is a static variable. This
  causes a couple of problems:
  1) Since WebSphere Application Server ships MyFaces in the
  runtime more than one application can be using this Static
  variable, which means each application is using the same
  renderer.
  2) The renderer was not being released during a restart of the
  application so one from a different ClassLoader was being used
  which is causing the ClassCastException.
  

Problem conclusion

• WebSphere Application server was updated to allow each
  application to have its own renderer for
  javax.faces.component.UIViewParameter.  The renderer is also
  not held onto any longer after the application
  has been restarted to avoid the ClassCastException.
  The following fix was pulled into WebSphere Application Server
  from the Apache MyFaces Open Source Community to resolve this
  problem:
  1) https://issues.apache.org/jira/browse/MYFACES-3594
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.0.2.  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:

  PM65693

• 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