IJ52920: A SIGSEGV/GPF EVENT RECEIVED WHILE GETTING EXTENDED NPE MESSAGE

APAR status

• Closed as program error.

Error description

• Error Message: Unhandled exception
  Type=Segmentation error
  .
  Stack Trace: getSendSlotsFromSignature(libj9vm29.so)
  getNPEMessage (libj9vm29.so)
  JVM_GetExtendedNPEMessage (libjvm.so)
  ffi_call_unix64(libj9vm29.so)
  ffi_call_int (libj9vm29.so)
  VM_BytecodeInterpreterCompressed3runEP10J9VMThread(libj9vm29.so)
  bytecodeLoopCompressed(libj9vm29.so)
  .
  

Local fix

• Use JVM Option -XX:-ShowCodeDetailsInExceptionMessages to
  disable the feature that displays the details of a
  NullPointerException generated by a VM.
  

Problem summary

• The problem was caused due to dereferencing a NULL value while
  getting NPE extended message.
  

Problem conclusion

• The JVM has been updated to prevent the crash.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
    21              21.0.6.0
    17              17.0.14.0
    11              11.0.26.0
  IBM SDK, Java Technology Edition
    8    SR -      (8.0.-.0)
  .
  Downloads and supplementary documentation can be found at the
  following locations:
  - For non z/OS operating systems:
   - IBM Semeru Runtimes, Version 11 and later
     https://www.ibm.com/semeru-runtimes/downloads/
   - IBM SDK, Java Technology Edition, Version 8
     https://www.ibm.com/support/pages/java-sdk-downloads/
  - For the z/OS operating system:
   - Java SDK Products on z/OS
     https://www.ibm.com/support/pages/java-sdk-products-zos
  

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