PI64495: DFHSJ1009 LIBERTY JVM RUAWAY CONDITION DETECTED; JVM SERVER WILL NOT DISABLE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During a recycle of the CICS region that has a Liberty JVM
  server, the following error message occurs:
  .
    DFHSJ1009 W date time applid tranid trannum JVMSERVER
      jvmserver is being disabled and restarted by CICS
      because a task running in a JVMSERVER has triggered
      a runaway condition, leaving the JVMSERVER in an
      inconsistent state.
  .
  The task never seems to end and the JVM remains in an
  inconsistent state.  Unable to disable the JVM, the CICS region
  must be cancelled.
  .
  In the SJ domain we see the the state of the JVMServer is
  'disablig (phase 0) resolved'.  One of the T8 TCBs associated
  with this JVMServer abended 999 (3E7).  The traceback for this
  TCB may be similar to:
  .
  Traceback:
    DSA      Entry
    1        SIDECARINVOKEREFLECTMETHOD
    2        JVM_InvokeMethod_Impl
    3        JVM_InvokeMethod
    4        JVM_InvokeMethod
    5        Java_sun_reflect_NativeMethodAccessorImpl_invoke0
    6        SIDECARINVOKEREFLECTMETHOD
    7        JVM_InvokeMethod_Impl
    8        JVM_InvokeMethod
    9        JVM_InvokeMethod
    10       Java_sun_reflect_NativeMethodAccessorImpl_invoke0
    11       RUNCALLINMETHOD
    12       gpProtectedRunCallInMethod
    13       signalProtectAndRunGlue
    14       j9sig_protect
    15       gpProtectAndRun
    16       gpCheckCallin
    17       callStaticVoidMethod
    18       call_router_method
    19       call_java_router
    20       invoke_sj_pthread
    21       sj_pthread_body
    22       CELQPCMM
  .
  .
  .
  Additional Symptom(s) Search Keyword(s): KIXREVCTC
  

Local fix

• First by setting the Liberty JVM server DISABLED and restarting
  the CICS region,  Then setting the JVM server ENABLED allowed
  it to come up.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All CICS users.                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * DFHSJ0001 message due to AKEA abend in DFHSJTH, with Liberty *
  * JVM server now unusable.                                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * .                                                            *
  ****************************************************************
  A Liberty JVM server performs some work, such as installing a
  bundle, which is not associated with a user task.  This work is
  performed using a thread retrieved from the thread pool and the
  CICS runaway timer is active.  The work is CPU intensive and
  takes longer than the ICVR limit.  As a result, the thread is
  abended with code '0999'x by DFHKETIX.  Control is passed to
  DFHAPLJP, which does not allow the Java stack to unwind.  As a
  consequence Liberty waits indefinitely for the thread to
  complete, which will never occur.  The region must be recycled
  to restore the JVM.
  Additional keywords: msgDFHSJ001 SJ0001 abendAKEA abend0999
  

Problem conclusion

• DFHSJTH and DFHXMAT have been modified to ensure that when
  threads are put into the Liberty thread pool the CICS runaway
  timer is disabled.  This prevents internal work from causing the
  reported problem.  Runaway is still enabled for user
  applications run under a CICS user task.
  

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:

  UI40553

Modules/Macros

• DFHSJTH  DFHXMAT  DFHXMTA  DFHSJBD  DFHSJDM  DFHSJDS  DFHSJDUF
  DFHSJIN  DFHSJIS  DFHSJJS  DFHSJL   DFHSJNT  DFHSJRE  DFHSJRL
  DFHSJRM  DFHSJSM  DFHSJST  DFHSJTRI DFHSJXM
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI40553

     UP16/09/21 P F609

Fix is available

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