IV62248: TRC_MM_J9ALLOCATEINDEXABLEOBJECT_OUTOFLINEOBJECTALLOCATIONTRACEP OINT INCORRECTLY REPORT NUMBER OF INDEXED FIELDS

APAR status

• Closed as program error.

Error description

• Error Message:
  The trace point log (or Health Centre) may incorrectly report
  the number of elements in an array.
  
  Specifically, something like the following may be displayed:
  
  j9mm.394 - indexable object allocated out-of-line sampled:
  class=0000000000E1EC00 (char<OSB><CSB>);object size=168; number
  of elements=4294967376
  
  This is clearly wrong since array in Java cannot have more than
  2147483647 elements.
  
  For reference, the correct tracepoint in this case should look
  like:-
  
  indexable object allocated out-of-line sampled:
  class=0000000000E1EC00 (char<OSB><CSB>); object size=168;number
  of elements=80
  
  Note that this can occur for arrays of any type.
  
  .
  Stack Trace: N/A
  .
  n/a
  

Local fix

• n/a
  

Problem summary

• This happened because an incorrect format specifier was used for
  thetracepoint format string.  Occasionally extra data might be
  read, leading to numbers much larger than expected to be
  printed.
  

Problem conclusion

• The number-of-elements argument was cast to the correct type.
  .
  This APAR will be fixed in the following Java Releases:
     6 R1 SR8 FP1   (6.1.8.1)
     7    SR7 FP1   (7.0.7.1)
     7 R1 SR1 FP1   (7.1.1.1)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, Java maintenance is available
  from:
             https://www.ibm.com/developerworks/java/jdk/
  

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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R260 PSY

     UP

• R270 PSY

     UP