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From "Antony Scerri (JIRA)" <j...@apache.org>
Subject [jira] Created: (DAEMON-165) Uncaught exceptions in main methods are being obscured
Date Fri, 25 Jun 2010 20:07:54 GMT
Uncaught exceptions in main methods are being obscured
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                 Key: DAEMON-165
                 URL: https://issues.apache.org/jira/browse/DAEMON-165
             Project: Commons Daemon
          Issue Type: Bug
          Components: Procrun
    Affects Versions: 1.0.2
         Environment: Procrun running on windows with any java release
            Reporter: Antony Scerri


Inside the__apxJavaWorkerThread method in javajni.c the following line just after the call
to execute the main method:

    JVM_EXCEPTION_CLEAR(lpJava);

is making any uncaught exception in the main method simply disappear. This can make diagnoising
startup and/or shutdown issues in applications over which you have no direct control (ie third
party apps for which you dont have sourcecode). I had this where a classpath error was causing
some issues and later some other exceptions, all were completely hidden until I removed this
line.

Two solutions I believe are possible.

1) Simply remove this line, the VM will then handle the exception by outputting it to standard
error in which case it will appear in the service stderr log file.

2) Check for and then obtain any exception and log appropriately

The second would give greater control to procrun and be more prominant in the main log rather
than the stderr logs.

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