IV60711: ILLEGAL INSTRUCTION EXCEPTION IN JIT SHARED LIBRARY ON RHEL7

PI28435: SHIP JAVA apar IV66110 for WAS V8553 using Java 7.1

APAR status

• Closed as program error.

Error description

• Error Message: An illegal instruction exception (SIGILL) is
  raised in the JIT shared library (libj9jit2X.so). The problem
  affects 31-bit System Z JDKs running on Linux (Red Hat
  Enterprise Linux 7).
  .
  Stack Trace: N/A
  .
  

Local fix

• This issue can be worked around with the
  -Xjit:noResumableTrapHandler option. This option may cause up to
  2% degradation in performance.
  

Problem summary

• This problem is caused by the JIT signal handler incorrectly
  setting the wrong addressing mode for a helper function on
  signal return. The kernel then tries to invoke the helper method
  in the wrong addressing mode, resulting in a crash.
  

Problem conclusion

• This APAR will be fixed in the following Java Releases:
     7 R1 SR1  FP1  (7.1.1.1)
     6 R1 SR8  FP1  (6.1.8.1)
     6    SR16 FP1  (6.0.16.1)
     7    SR7  FP1  (7.0.7.1)
  .
  The JVM has been updated to correctly set the addressing mode to
  prevent the illegal instruction exception from occurring.
  

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