IZ86722: JVM HANG OR CRASH WITH TRUNCATED JAVACORE FILE

APAR status

• Closed as program error.

Error description

• Error Message: A javacore will be generated but it will fail to
  complete either during "LOCKS subcomponent dump routine" or
  "THREADS subcomponent dump routine" .
  .
  Stack Trace: JVMDUMP006I Processing dump event "user", detail ""
  - please wait.
     JVMDUMP032I JVM requested Java dump using
  '/opt/IBMWebAS61/profiles/profileServer/heapdumps/javacore.20101
  011.153024.13297.0005.txt' in response to an event
     JVMDUMP013I Processed dump event "user", detail "".
  .
  There may also be a hang or crash in the VM at the time of the
  java core.
  
  This APAR covers changes under APAR IZ84930
  
  Please refer to SOV,175499
  

Local fix

• Disable java core dumps. -Xdump:java:none
  

Problem summary

• The problem is caused when the internal state of the JVM changes
  while the JVM is writing a javacore file.
  

Problem conclusion

• This defect will be fixed in:
  
  5.0.0 SR12 FP3
  5.0.0 SR13
  6.0.0 SR9
  
  The javacore code has been updated to increase its resilience.
  

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:

  IZ86726 PM31577

Fix information

• Fixed component name

  JAVA 5 J9 COMMO

• Fixed component ID

  620500127

Applicable component levels

• R500 PSY

     UP