IJ51598: JAVA HEALTHCENTER ABORT AT SHUTDOWN ON Z/OS

APAR status

• Closed as program error.

Error description

• Error Message: Intermittent z/OS crash in libhealthcenter.so
  when stopping Java VM
  .
  Stack Trace: 27 JNIEnv_::GetStaticMethodID(_jclass*,const
  char*,const char*)
   +00000054 *PATHNAM
  
  28
  ibmras::monitoring::plugins::j9::getMXBean(JNIEnv_*,_jclass*
   +00000250 *PATHNAM
  
  29
  ibmras::monitoring::plugins::j9::cpu::CpuPlugin::pullInt()
   +0000080C *PATHNAM
  
  30 ibmras::monitoring::plugins::j9::cpu::pullWrapper()
  
   +00000054 *PATHNAM
  
  31
  ibmras::monitoring::agent::threads::WorkerThread::processLoop
   +000001EE *PATHNAM
  
  32
  ibmras::monitoring::agent::threads::WorkerThread::threadEntry
  .
  

Local fix

Problem summary

• The problem was caused by ThreadPool::stopAll destructing the
  WorkerThread while it was still running in processLoop. This
  implicitly detached the thread from VM causing aborts while
  shutting down.
  

Problem conclusion

• The Java Health Center agent has been updated to ensure shutdown
  
  actions occur in the right order to prevent the abort.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM SDK, Java Technology Edition
   8 SR8 FP35 (8.0.8.35)
  .
  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