IV12260: JVM CRASHES WITH DYNAMIC_CODE_UNLOAD JVMTI EVENT

APAR status

• Closed as program error.

Error description

• Error Message: A segmentation error is received
  .
  Stack Trace: j9thread_monitor_enter () from libj9thr24.so
    jvmtiHookDynamicCodeUnload () from libj9jvmti24.so
    J9HookDispatch () from libj9hookable24.so
    freeClassLoader () from libj9vm24.so
    freeJavaVM () from libj9vm24.so
    protectedDestroyJavaVM () from libj9vm24.so
    j9sig_protect () from libj9prt24.so
    DestroyJavaVM () from libj9vm24.so
    DestroyJavaVM () from j9vm/libjvm.so
    JavaMain ()
  .
  

Local fix

Problem summary

• The problem is caused when compilation is trying to enter a
  monitor with a null mutex.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR10
  6.0.1 SR1
  .
  The JVM has been updated to ensure the corresponding mutex is
  not null.
  

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

• R600 PSY

     UP

• R260 PSY

     UP