PM22278: INCORRECT OUTPUT WITH JIT ON IN METHODS WITH LOOPS INSIDE

APAR status

• Closed as program error.

Error description

• Error Message: Methods with heavy loops inside gets an incorrect
  result or an exception stack trace when ran with JIT ON, on RHEL
  6 platoform. The same method runs fine on lower versions of
  linux.
  .
  Stack Trace: java.lang.IllegalArgumentException: Field not
  found: language
  	at
  javasoft.sqe.serial.StreamObjectClass.getField(StreamObjectClass
  .java:292)
  	at
  javasoft.sqe.tests.api.java.util.Locale.serial.InputTests.InputT
  est0002(InputTests.java(Compiled Code))
  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at
  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
  Impl.java:88)
  	at
  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
  Impl.java:61)
  	at
  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
  AccessorImpl.java:60)
  	at java.lang.reflect.Method.invoke(Method.java:391)
  	at
  javasoft.sqe.javatest.lib.MultiTest.invokeTestCase(MultiTest.jav
  a:399)
  	at javasoft.sqe.javatest.lib.MultiTest.run(MultiTest.java:195)
  	at
  javasoft.sqe.tests.api.java.util.Locale.serial.InputTests.main(I
  nputTests.java:247)
  .
  NONE
  

Local fix

• export JITC_COMPILEOPT=NMMI2JIT
  

Problem summary

• Methods with heavy loops inside gets an incorrect result or an
  exception stack trace when ran with JIT ON, on RHEL 6 platoform.
  The same method runs fine on lower versions of linux.
  

Problem conclusion

• This defect will be fixed in:
  1.4.2 SR13 FP8
  .
  There is a problem in certain JIT compiled code which has heavy
  loops as well as which makes use of double precision floating
  point values in the method. Because of this, the method results
  in an incorrect execution, or in some cases, throws exception.
  .
  .
  To obtain the fix:
  Install build 20100915 or later
  

Temporary fix

• export JITC_COMPILEOPT=NMMI2JIT
  

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

  JAVA(1.3/1.4 CO

• Fixed component ID

  5648C9800

Applicable component levels

• R42A PSN

     UP

• R42L PSN

     UP

• R42W PSN

     UP

• R420 PSN

     UP