Re: [Wrapper-user] Non-console application shutdown

[Leif M. <le...@ta...>]

Richard,
    The "User logged out.  Ignored." Messages show up when the Wrapper 
is being run as
a service and an actual user who is logged in logs out to the Windows 
login screen.  The
service stays running in the background.  This message is there to help 
record the timing
of that event.
    The message is displayed in response to a LOGOUT signal being 
received from the
OS.   Some Windows versions sent multiple signals, thus the duplicate 
messages.  It
is nothing to worry about and unrelated to shutdown.

    In this case, is what is happening is that your JBoss application is 
calling System.exit
as it shuts down.   Normally, this would cause the Wrapper to exit as 
the application
had completed normally.  When System.exit is called, the Java executes 
all registered
shutdown hooks.   The Wrapper registers such a shutdown hook to handle 
the smooth
shutdown of the JVM.
    The problem is that in your case, you have specifically disabled the 
shutdown hooks.
When this is done, the Wrapper's shutdown hook is not run and the 
Wrapper process
has no way of telling if the JVM crashed or shutdown intentionally.   So 
it states that
fact, assumes a crash and restarts the JVM.
    Take a look at this page:
http://wrapper.tanukisoftware.org/doc/english/prop-disable-shutdown-hook.html

    From your last sentence, it sounds like you are not expecting the 
Java application
to be exiting?   But that conflicts with what I am seeing in the log 
file?   Are you asking
why JBoss is shutting down in the first place?

    If you rerun your application with wrapper.debug=true then I can 
tell you exactly
what is initiating the JVM shutdown (If it is being done by the 
Wrapper).   But I am
pretty sure your app is calling System.exit.  Just not sure what is 
initiating that.

Cheers,
Leif

Richard Emberson wrote:

> I have the following in a wrapper log:
>
> INFO   | wrapper  | 2005/10/31 14:37:19 | User logged out.  Ignored.
> INFO   | wrapper  | 2005/10/31 14:37:19 | User logged out.  
> Ignored.      INFO   | jvm 5    | 2005/10/31 14:37:20 |      [java] 
> Shutting down
> INFO   | jvm 5    | 2005/10/31 14:37:20 |      [java] Shutdown 
> complete    INFO   | jvm 5    | 2005/10/31 14:37:20 |      [java] 
> Halting VM
> INFO   | wrapper  | 2005/10/31 14:37:20 | User logged out.  
> Ignored.       INFO   | wrapper  | 2005/10/31 14:37:20 | User logged 
> out.  Ignored.
> INFO   | jvm 5    | 2005/10/31 14:38:23 
> |                                  INFO   | jvm 5    | 2005/10/31 
> 14:38:23 | BUILD SUCCESSFUL
> INFO   | jvm 5    | 2005/10/31 14:38:23 | Total time: 5,938 minutes 26 
> seconds                                                                          
>
> ERROR  | wrapper  | 2005/10/31 14:38:24 | JVM exited unexpectedly.
> STATUS | wrapper  | 2005/10/31 14:40:01 | Launching a 
> JVM...              INFO   | jvm 6    | 2005/10/31 14:40:02 | Wrapper 
> (Version 3.1.2) http://wrapper.tanukisoftware.org
>
> The line "Shutting down", "Sutdown complete" and "Halting VM" are 
> being printed
> to standard out by a Shutdown Hook registered by JBoss, the 
> application being
> controled by the wrapper.
>
> The "User logged out.  Ignored" indicates that the wrapper is not 
> being run in a
> console (looking at the source code) and when ignored, the wrapper 
> does not
> kill its application. The wrapper then gones on to restart the 
> application.
>
> Don't think its relevant, but:
> wrapper.disable_shutdown_hook=TRUE
>
> Why would there be multiple "User logged out.  Ignored" lines?
>
> Any hints as to what mechanism(s) might lead to the wrapped application
> to stop?
>
> Thanks.
>
> Richard
>