IV49657: OPTION TO PREVENT THE EXIT OF A JAVA PROCESS RUNNING AS A WINDOW S SERVICE, ON A LOG-OFF EVENT

APAR status

• Closed as program error.

Error description

• Error Message:
  .
  Stack Trace: N/A
  .
  In general, Windows services should not exit on the log-off
  event. However, Java while running as a Windows service or a sub
  process of a windows service exits on the Windows log-off event.
  

Local fix

• To work around the issue, the signal handling in java can be
  disabled using the -Xrs option. However, it has the following
  limitations:
  1. If you have installed application shutdown hooks, they will
  not run in the case of Java being brought down during a Windows
  shutdown event.
  2. Dump collection, for diagnostic purposes, will not function.
  

Problem summary

• Currently, the JVM signal handler triggers a JVM shutdown on the
  log-off event irrespective of whether or not it is running as a
  service.
  A Windows service may launch a Java application in the following
  ways:
      - Launch Java itself as a windows service
      - Launch Java  as a sub-process of the windows service
  The APAR IV37554 deal with the scenario when the Java itself is
  running as a service. However, it cannot handle the situation
  when Java is launched as sub-process of a Windows service.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR15
  6.0.1 SR7
  7.0.0 SR6
  .
   The JDK has been provided a new system proprty
  "com.ibm.signalhandling.ignoreLogoff" which will retain the Java
  process alive even if it run as a sub-process of  a Windows
  service. By default, the property is disabled
  (com.ibm.signalhandling.ignoreLogoff=false) and the  Java
  process gets terminated with Windows logoff if it runs as a
  sub-process of Windows service. By enabling  the property
  through command line argument
  "-Dcom.ibm.signalhandling.ignoreLogoff=true', the Java process
  will be retained across Windos logoff event even when Java runs
  as a subprocess of a windows service.
  

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

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels

• R600 PSY

     UP

• R700 PSY

     UP