IJ57257: JAVA VM FAILS WITH ASSERTION FAILED IN CNATHELP.CPP ON IBM Z

APAR status

• Closed as program error.

Error description

• Error Message: j9codertvm(j9ji.105 * ** ASSERTION FAILED ** at
  .../codert_vm/cnathelp.cpp:134: (!((0 != (((iTableOffset)) &
  ((1))))))
  .
  Stack Trace: N/A
  .
  In multi-threaded applications on z/OS or Linux on IBM Z, the
  JVM may encounter an assertion failure in cnathelp.cpp related
  to invocations of interface method calls.
   This issue is highly intermittent and timing-dependent.
  It arises from a race condition that exists when multiple
  threads invoke the method resolution logic for the same
  interface method callsite within JIT-compiled code, where
  concurrent threads may observe inconsistent or partially updated
  state.
  

Local fix

• This issue has no known workaround.
  

Problem summary

• A race condition exists when multiple threads invoke the method
  resolution logic for the same interface method callsite within
  JIT-compiled code, where concurrent threads may observe
  inconsistent or partially updated state.
  

Problem conclusion

• The JIT compiler has been updated to ensure consistent updates
  to, and access of, the shared interface method resolution data.
  
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
   25 25.0.3.0
   21 21.0.11.0
   17 17.0.19.0
   11 11.0.31.0
  IBM SDK, Java Technology Edition
   8 SR8 FP65 (8.0.8.65)
  .
  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

  JIT

• Fixed component ID

  620700124

Applicable component levels