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 Semeru Runtimes
  
  25              25.0.5.0
  21              21.0.13.0
  17              17.0.21.0
  11              11.0.33.0
  
  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