IV78431: JVM CRASHES IN THE JIT COMPILER

APAR status

• Closed as program error.

Error description

• Error Message: A segmentation error is raised by the JIT
  compiler with vmstate=0x51eff.
  .
  Stack Trace: N/A
  .
  This problem is known to be very intermittent
  

Local fix

• The JVM option -Xjit:disablePRE may be sufficient to stop the
  failure from occurring in some cases. This option is known to
  have a moderate impact on the performance of some workloads. No
  workaround is known to be completely effective at preventing all
  occurrences of this failure.
  

Problem summary

• The problem was caused by a JVM runtime compiler optimization
  incorrectly handling one of the runtime safety checks of the
  Java programming language. The resolution check verifies that a
  symbolic class name resolves to a particular class that the JVM
  can identify. An internal JIT data structure associated with
  this check could be modified to an incorrect state, resulting in
  the crash.
  

Problem conclusion

• The problematic optimization was corrected to ensure that this
  runtime safety check is correctly handled.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR2       (8.0.2.0)
     7    SR9 FP20  (7.0.9.20)
     7 R1 SR3 FP20  (7.1.3.20)
     6 R1 SR8 FP15  (6.1.8.15)
     6    SR16 FP15 (6.0.16.15)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

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

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

     UP

• R260 PSY

     UP

• R600 PSY

     UP