Hi folks, Recently this started to pop up in my logs: 23.03.2012 14:12:28 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SCHWERWIEGEND: The web application [/ket] appears to have started a thread named [PoolCleaner[18291494:1332172047553]] but has failed to stop it. This is very likely to create a memory leak.
There is some similar thread [1] which had no real result. I am on Tomcat 6.0.35, all DataSources are created in the context.xml file. All DataSources are cleaned up (closed) with a context.xml Listener. The JDBC Pool is version 7.0.26. As far as my debug sessions have revealed (with attached VisualVM), it does not matter how many apps you deploy the PoolCleanTimer thread is created only once and retained until all apps have been stopped or removed. This makes Tomcat think that this is a memory leak. Is there a way to associate this thread with another class loader in order to avoid this problem or create multiple threads or simple ignore this warning which is not a solution for those who face that issue too? Besides that, the numbers in the thread name are not very informative, the classloader hashcode and timestamp did not really help to to identify anything. Can this be improved? [1] http://www.mail-archive.com/users@tomcat.apache.org/msg87350.html With best regards, Michael Osipov --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
