IZ35344: CRASH IN JIT COMPILED METHOD WITH MORE THAN 16 PARAMETERS

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  

Local fix

• This problem can be worked around by excluding affected methods
  from JIT compilation; however, the methods to be excluded depend
  on the specific application / situation and require deep
  technical expertise for identification.  Please contact IBM for
  assistance with a work-around.
  

Problem summary

• During a transition from executing JIT'ed java code to executing
  interpreted java code, when more than 16 parameters have been
  passed and some of the parameters above the 16th are floats and
  / or doubles, a hashing algorithm fails to distinguish between
  two called methods and re-uses a data structure that is not
  compatible between the two methods.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR4
  5.0.0 SR12
  .
  The hashing algorithm has been improved such that it correctly
  distinguishes between the two called methods.
  .
  To obtain the fix:
  Install build 20081117 or later
  

Temporary fix

Comments

APAR Information

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

  IZ35337

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

Fix information

• Fixed component name

  JAVA 5 J9 COMMO

• Fixed component ID

  620500127

Applicable component levels

• R500 PSN

     UP