IZ80935: JIT-COMPILED METHOD SHOWS INCORRECT BEHAVIOUR WITH -XQUICKSTART

APAR status

• Closed as program error.

Error description

• Error Message: The Apache Harmony method
  org/apache/harmony/jndi/internal/parser/RelaxedDnParser.parse
  (which is used by the javax/naming/ldap API) can behave
  incorrectly or return incorrect result, when it is compiled by
  the just-in-time compiler, and when the -Xquickstart option is
  in effect. The issue may affect other methods as well.
  .
  Stack Trace: N/A
  .
  

Local fix

• This issue can be avoided with the -Xjit:disableGlobalVP option.
  Note however this will cause a significant performance
  degradation. Removing the -Xquickstart may or may not prevent
  the problem completely.
  

Problem summary

• The problem is caused by a JIT compiler analysis that had
  ignored certain exception paths in the compiled method, leading
  to incorrect logic in the resulting code.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR8
  5.0.0 SR12
  .
  The JIT compiler has been updated to prevent the problem.
  .
  To obtain the fix:
  Install build 20100128 or later
  

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:

  IZ80936

Fix information

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R600 PSN

     UP