[
http://jira.codehaus.org/browse/MEXEC-18?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_87431
]
Jerome Lacoste commented on MEXEC-18:
-------------------------------------
Is there really a need to interrupt the daemon threads ?
I've made some basic tests with the following code, and it looks like the VM is
never interrupting daemon threads, just ignoring them.
class Test {
public static void main(String[] args) {
Thread t = new Thread(new Runnable() {
public void run() {
try {
System.out.println("waiting");
synchronized(this) {
this.wait();
}
} catch (InterruptedException e) {
System.err.println("interrupted");
}
System.out.println("exiting...");
}
});
t.setDaemon(true);
t.start();
// wait for thread to start
try {
System.out.println("sleeping");
Thread.currentThread().sleep(500);
} catch (InterruptedException e) {
System.out.println("main interrupted");
}
System.out.println("done");
}
}
So it looks like we can just change the code to ignore the non daemon threads.
That will remove the configuration options. I prefer that.
> un-stopped damean threads prevent plugin shutdown
> -------------------------------------------------
>
> Key: MEXEC-18
> URL: http://jira.codehaus.org/browse/MEXEC-18
> Project: Mojo Exec Plugin
> Issue Type: Bug
> Affects Versions: 1.1
> Environment: using latest snapshot
> Reporter: Ryan Sonnek
>
> my application is using daemon threads, and the exec:java plugin just hangs.
> {noformat}
> [DEBUG] interrupting thread Thread[Lazy
> Clock,1,com.digitalriver.schedule.JobRunner]
> [DEBUG] joining on thread Thread[Lazy
> Clock,1,com.digitalriver.schedule.JobRunner]
> {noformat}
> since these are daemon threads, the exec:java plugin should try to
> interrupt/join, but exit cleanly without worrrying about them.
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