IJ31072: JAVA HEALTHCENTER ABORT AT SHUTDOWN

APAR status

• Closed as program error.

Error description

• Error Message: Intermittent z/OS crash in libhealthcenter.so
  when stopping Java VM
  .
  Stack Trace: Abort with two possible stack traces observed in
  IPCS:
  1)
  abort       HLE77C0:edcabort.c
  masterSynchSignalHandler
              j20200901
  __zerro     HLE77C0:edczerro.c
  __zerros    HLE77C0:edczerro.c
  ** NoName
  **.......................c..F....-....WorkerThread.cpp...
  ** NoName
  **.......................c..F....-....WorkerThread.cpp...
  ** NoName
  **.......................c..F....-.&..Thread.cpp...UI4349
  2)
  abort       HLE77C0:edcabort.c
  mainSynchSignalHandler
              j20201102
  __zerro     HLE77C0:edczerro.c
  __zerros    HLE77C0:edczerro.c
  ibmras::common::port::Semaphore::open(int*)
              .......................c..F.b..-...
  ....Thread.cpp...D2
  ibmras::common::port::Semaphore::wait(unsigned int)
              .......................c..F.b..-...
  ....Thread.cpp...D2
  ibmras::monitoring::agent::threads::WorkerThread::processLoo
              .......................c..F.b..-...
  .-..WorkerThread.cpp
  ibmras::monitoring::agent::threads::WorkerThread::threadEntr
              .......................c..F.b..-...
  .-..WorkerThread.cpp
  An additional symptom of this in jdmpview will show something
  like the following as frames at the top of the crash stack
  (particularly the WorkerThread symbol):
  bp: 0x000000517faff180 pc: 0x000000003465a940
  /prd/link/wlp/wlp/E4_BMIS/lib/native/zos/s390x/../../../../java/
  8.0/lib/s390x/libhealthcenter.so::threadEntry__Q5_6ibmras10monit
  oring5agent7threadsEI12WorkerThreadFPQ4_6ibmras6common4port10Thr
  eadData+0x20
  bp: 0x000000517faff280 pc: 0x000000003460bd50
  /prd/link/wlp/wlp/E4_BMIS/lib/native/zos/s390x/../../../../java/
  8.0/lib/s390x/libhealthcenter.so::wrapper+0x60
  .
  The problem was caused by ThreadPool::stopAll destructing the
  WorkerThread while it was still running in processLoop. This
  implicitly destructed the Semaphore which implicitly destructed
  its fields like name and led to undefined behavior which drove
  the crash.
  Problem has only been observed on z/OS.
  This issue was introduced in Java 8.0.6.15.
  

Local fix

Problem summary

• Intermittent z/OS crash in libhealthcenter.so when stopping Java
  VM
  

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 Java Releases:
     8    SR6 FP35  (8.0.6.35)
     7    SR10 FP90 (7.0.10.90)
     7 R1 SR4 FP90  (7.1.4.90)
  .
  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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

     UP

• R260 PSY

     UP