IJ17563: NULLPOINTEREXCEPTION WHEN CALLING JAVA.LANG.STRING.INDEXOF API WITH A LARGE OFFSET

APAR status

• Closed as program error.

Error description

• Error Message: A NullPointerException is thrown and the
  java.lang.String.indexOf API appears close to the top of the
  stack backtrace.
  .
  Stack Trace: java.lang.NullPointerException
          at
  com.ibm.jit.JITHelpers.intrinsicIndexOfStringUTF16(JITHelpers.ja
  va:605)
          at java.lang.String.indexOf(String.java:2169)
  .
  This issue only happens when a very large offset is passed to
  the String.indexOf API, for example Integer.MAX_VALUE - 1.
  

Local fix

• This issue can be worked around by passing in a smaller offset
  value or via the -Xjit:disableRecognizedMethods JVM option. Note
  however that using the -Xjit option may degrade performance.
  

Problem summary

• The JCL code had an overflow scenario when large values are
  passed through the offset argument.
  

Problem conclusion

• The JCL code has been fixed to prevent the overflow. See
  https://github.com/eclipse/openj9/pull/6403
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP41  (8.0.5.41)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             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

  JIT

• Fixed component ID

  620700124

Applicable component levels