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Brian,
On 11/16/2010 3:23 PM, Brian wrote:
> Nov 15, 2010 8:37:28 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [] is still processing a request that has yet to
> finish. This is very likely to create a memory leak. You can control the time
> allowed for requests to finish by using the unloadDelay attribute of the
> standard Context implementation.
Looks like you have some (or at least one) long-running request. Maybe
it's generating a ton of buffered output, too :)
> Nov 15, 2010 8:37:28 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [] is still processing a request that has yet to
> finish. This is very likely to create a memory leak. You can control the time
> allowed for requests to finish by using the unloadDelay attribute of the
> standard Context implementation.
Again.
> Nov 15, 2010 8:37:28 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [] is still processing a request that has yet to
> finish. This is very likely to create a memory leak. You can control the time
> allowed for requests to finish by using the unloadDelay attribute of the
> standard Context implementation.
Interesting that it generated all of these messages at the same time.
I'm not sure if that means you have 3 requests pending or that 3
different problems were found with one thread.
> Nov 15, 2010 8:37:29 PM org.apache.catalina.loader.WebappClassLoader loadClass
> INFO: Illegal access: this web application instance has been stopped already.
> Could not load com.manuals.common.utility.Log. The eventual following stack
> trace is caused by an error thrown for debugging purposes as well as to
> attempt to terminate the thread which caused the illegal access, and has no
> functional impact.
> java.lang.IllegalStateException
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1531)
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
> at
> com.manuals.model.utility.DatabaseObject.getStatement(DatabaseObject.java:434)
> at
> com.manuals.model.utility.DatabaseObject.getQueryResultSet(DatabaseObject.java:366)
> at
> com.manuals.model.utility.DatabaseObject.getQueryResultSet(DatabaseObject.java:326)
So that thread is actually doing something -- it hasn't just blocked
indefinitely: your DatabaseObject class is causing the WebappClassLoader
to attempt to load a new class that hadn't been previously loaded. Since
WebappClassLoader knows it's shutting down (or has already shut down at
that point), it is refusing to fulfill the request.
> And also this:
>
> ov 15, 2010 8:31:09 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
> Nov 15, 2010 8:31:10 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
> Nov 15, 2010 8:31:11 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
> Nov 15, 2010 8:31:12 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
> Nov 15, 2010 8:31:13 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
> Nov 15, 2010 8:31:14 PM org.apache.catalina.core.StandardWrapper unload
> INFO: Waiting for 1 instance(s) to be deallocated
Since these messages are from earlier, I assume you were just pasting
them in arbitrary order into your post: it looks like Tomcat waited for
a while for your requests to complete (looping, complaining once per
second) and then finally gave up and issued the messages above
("...still processing a request...") at the end.
> Nov 15, 2010 8:31:16 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [] appears to have started a thread named [MySQL
> Statement Cancellation Timer] but has failed to stop it. This is very likely
> to create a memory leak.
There is almost nothing you can do about this except to upgrade your
MySQL driver: http://bugs.mysql.com/bug.php?id=36565
> Nov 15, 2010 8:31:20 PM org.apache.catalina.core.StandardContext stop
> INFO: Container
> org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/] has not
> been started
This is a different issue. Note that [] (root) is not [/]. Have you
specified your webapp's "path" somewhere. Don't do that.
- -chris
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