IV43173: THROWABLE FOR CLASS INITIALIZATION ERROR RETAINED USING WEAKREFE RENCE

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• When a Class fails to initialize, the exception that caused the
  failure is stored as a WeakReference, to allow class unloading
  to occur. However, since its a WeakReference, the exception is
  discarded after the first gc, which when using gencon could be
  the next scavenge. In this issue arises, a
  java.lang.NoClassDefFoundError would be thrown and the result of
  the getCause() doesn't contain original exception information
  such as following stacktrace.
  java.lang.NoClassDefFoundError: defects.cmvc195512.FailToInit
  (initialization failure)
   at
  java.lang.J9VMInternals.initializationAlreadyFailed(J9VMInternal
  s.java:236)
   at java.lang.J9VMInternals.initialize(J9VMInternals.java:307)
   at
  defects.cmvc195512.TestFailedInit.fail(TestFailedInit.java:57)
   at
  defects.cmvc195512.TestFailedInit.test(TestFailedInit.java:40)
   at
  defects.cmvc195512.TestFailedInit.main(TestFailedInit.java:9)
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR5
  6.0.1 SR6
  .
  A SoftReference is used of a WeakReference so the exception is
  retained for a longer period of time.
  

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

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