PM90727: USING CLASSLOADERS TO DETERMINE EJB DESCRIPTOR MAY CAUSE OOM

7.1.0.3-TIV-ITCAMAD-IF0008: ITCAM for Application Diagnostics V7.1 FP3 IF8
7.1.0-TIV-ITCAMAD-FP0004: ITCAM for Application Diagnostics V7.1 Fix Pack 4

APAR status

• Closed as program error.

Error description

• ---------------------------------------------
  Users Affected:
  
  User with applications with specific EJB architecture
  ---------------------------------------------
  Problem Description:
  
  The use of classloaders, even as a backup, for determining the
  EJB descriptor file in particular applications can lead to OOM
  conditions.
  

Local fix

Problem summary

• ****************************************************************
  Users Affected:
  
  J2EE application that have EJBs whose descriptors are not
  present in the usual META-INF directory.
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  
  If the descriptor is not present in the META-INF directory then
  ITCAM creates a large number of classloaders to search through
  various directories.  This can lead to native OutOfMemoryError
  since the native memory of these classloaders may not be
  released in time by the JVM.
  
  ****************************************************************
  

Problem conclusion

• This APAR fix will directly read the descriptor without using
  classloaders.  However, to maintain backward compatibility and
  if it becomes required the following property can be set to use
  the classloaders to load the EJB descriptors:
  
  am.camtoolkit.gpe.ejb.descriptor.locator.useclassloader=true
  
  in toolkit_custom.properties file.
  
  The fix for this APAR is contained in the following maintenance
  release:
  
   | interim fix | 7.1.0.3-TIV-ITCAMAD-IF0008
  

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

  TCAM AD WAS DC

• Fixed component ID

  5724Y92DC

Applicable component levels

• R710 PSY

     UP