IV29640: LINKAGEERROR WHEN MULTIPLE THREADS LOAD THE SAME CLASS

APAR status

• Closed as program error.

Error description

• Error Message: If two or more threads simultaneously attempt to
  load the same class using the same classloader, it is possible
  for the class loading to fail with a LinkageError.
  .
  Stack Trace: java.lang.LinkageError: my.Klass
          at
  java.lang.ClassLoader.defineClass(ClassLoader.java:295)
          at
  java.lang.ClassLoader.defineClass(ClassLoader.java:232)
  ...
  .
  

Local fix

Problem summary

• This is due to an error in the JVM classloading synchronization
  algorithm.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR3
  6.0.1 SR4
  6.0.0 SR12
  .
  The synchronization algorithm has been corrected.
  

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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R260 PSY

     UP

• R600 PSY

     UP