IZ80951: JIT-COMPILED METHOD SHOWS INCORRECT BEHAVIOUR ON Z/LINUX

APAR status

• Closed as program error.

Error description

• Error Message: A Java method that casts a long value into a byte
  and then stores the byte into a byte array, when it is
  JIT-compiled, can sometimes store an incorrect value into the
  array.
  This problem affects both Java 5 and Java 6, but only on z/OS or
  z/Linux.
  .
  Stack Trace: N/A
  .
  

Local fix

• This is no workaround for this issue except to disable the
  compilation of the affected method with the -Xjit:exclude={...}
  option.
  

Problem summary

• The problem is caused by a bug in the z/Architecture code
  generator of the JIT compiler.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR8
  5.0.0 SR12
  .
  The JIT compiler has been updated to correct the issue.
  .
  To obtain the fix:
  Install build 20100227 or later
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IZ80950

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA 5 JIT

• Fixed component ID

  620500124

Applicable component levels

• R500 PSN

     UP