[Wrapper-user] Wrapper not restarting JVM after NullPointerException

[Andy B. <aba...@ca...>]

In my testing on Linux I set up a Java application to throw a  
NullPointerException. I expected the Java Service Wrapper to restart my  
Java application, but instead the Wrapper just stops, apparently  
exiting normally.

Here is the end of my debug log:

> INFO   | jvm 1    | 2003/04/21 23:28:25 |  
> java.lang.NullPointerException: Test Exception!
> INFO   | jvm 1    | 2003/04/21 23:28:25 |       at  
> com.ctech.cmtk.ChangeManagementToolkit.runLoop(ChangeManagementToolkit. 
> java:56)
> INFO   | jvm 1    | 2003/04/21 23:28:25 |       at  
> com.ctech.util.ReThread.run(ReThread.java:160)
> DEBUG  | wrapperp | 2003/04/21 23:28:27 | send a packet 103 : ping
> INFO   | jvm 1    | 2003/04/21 23:28:27 | Received a packet 103 : ping
> INFO   | jvm 1    | 2003/04/21 23:28:27 | Send a packet 103 : ok
> INFO   | jvm 1    | 2003/04/21 23:28:27 | All non-daemon threads have  
> stopped.  Exiting.
> INFO   | jvm 1    | 2003/04/21 23:28:27 | Send a packet 101 : 0
> DEBUG  | wrapperp | 2003/04/21 23:28:27 | read a packet 103 : ok
> DEBUG  | wrapper  | 2003/04/21 23:28:27 | Got ping response from JVM
> DEBUG  | wrapperp | 2003/04/21 23:28:27 | read a packet 101 : 0
> DEBUG  | wrapper  | 2003/04/21 23:28:27 | JVM requested a shutdown. (0)
> DEBUG  | wrapper  | 2003/04/21 23:28:27 | wrapperStopProcess(0) called.
> DEBUG  | wrapper  | 2003/04/21 23:28:27 | Sending stop signal to JVM
> DEBUG  | wrapperp | 2003/04/21 23:28:27 | send a packet 101 : NULL
> INFO   | jvm 1    | 2003/04/21 23:28:28 | Thread, Wrapper-Connection,  
> handling the shutdown process.
> INFO   | jvm 1    | 2003/04/21 23:28:28 | calling listener.stop()
> INFO   | jvm 1    | 2003/04/21 23:28:28 | returned from listener.stop()
> INFO   | jvm 1    | 2003/04/21 23:28:28 | Send a packet 107 : 0
> INFO   | jvm 1    | 2003/04/21 23:28:28 | Closing socket.
> DEBUG  | wrapperp | 2003/04/21 23:28:28 | read a packet 107 : 0
> DEBUG  | wrapper  | 2003/04/21 23:28:28 | JVM signalled that it was  
> stopped.
> DEBUG  | wrapperp | 2003/04/21 23:28:28 | socket read no code  
> (closed?).
> INFO   | jvm 1    | 2003/04/21 23:28:28 | calling System.exit(0)
> DEBUG  | wrapper  | 2003/04/21 23:28:28 | JVM exited normally.
> STATUS | wrapper  | 2003/04/21 23:28:28 | <-- Wrapper Stopped

Here is my setup: I have coded a CmtkWrapper class that implements  
WrapperListener using Integration Method #3 as described on the  
website. My CmtkWrapper class starts my ChangeManagementToolkit class  
which extends ReThread which extends the java.lang.Thread class. So  
essentially I'm throwing a NPE from within the run() method of a  
java.lang.Thread.

As I said, I expected the Java Service Wrapper to restart my Java  
application. Am I doing something wrong or am I misunderstanding what  
the appropriate behavior should be?

~Cheers,
Andy