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Ivan,
On 8/13/2010 6:45 AM, Ivan Mladenović wrote:
> I define ServletContextListener (create my implementation of this listener
> and define this listener in web.xml). In method contextDestroyed I try to
> shutdown all of the schedulers in following way:
>
> ApplicationContext context = (ApplicationContext)
> sce.getServletContext().getAttribute(WebApplicationContext.*
> ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE*);
I don't recognize the above, but I suppose you know what you are doing.
> scheduler = (StdScheduler) context.getBean("scheduler");
>
> cbcInterfaceScheduler.shutdown(*true*);
Are these the same object? It looks like you are not shutting-down the
object you got from the context.
> Boolean parameter means: wait for jobs to complete.
>
> I follow the logs, destroy method is called and all schedulers are shutdown.
Sounds good.
> When I try to deploy same WAR file again, following error appears in
> catalina log file:
>
> Aug 13, 2010 12:22:54 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
>
> SEVERE: The web application [] appears to have started a thread named
> [scheduler_Worker-8] but has failed to stop it. This is very likely to
> create a memory leak.
Could that be the old version of the webapp? Try a completely clean
deployment, then re-deploy and see what happens.
> Aug 13, 2010 12:22:54 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
>
> SEVERE: The web application [] appears to have started a thread named
> [Thread-32] but has failed to stop it. This is very likely to create a
> memory leak.
This is likely to be some /other/ thread - not scheduling related - that
your webapp created (note that it has a generic name).
> This is confusing for me because this is shown in log file when I try to
> deploy application.
Maybe ask the people who wrote the scheduler?
You may have to attach a profiler to the server and observe where these
threads are actually being created, and what actually happens when you
call the shutdown() method on your scheduler.
Hope that helps,
- -chris
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