Tomcat version: 7.0.42 Server OS: Sun Solaris UCP Version: Oracle 12c Oracle Driver: ojdbc7 JDK version: 1.8.0_31
Issue Description: When tomcat shuts down our web service during a hot deployment threads are left running that tomcat cannot shutdown. I believe the threads are from the universal connection pool. We use oracle's universal connection pool (ucp.jar). After multiple deployments the threads build up and cause high CPU usage from the 2 tomcat threads. Log Error Examples: Feb 08, 2016 8:00:25 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: The web application [/RatingService] appears to have started a thread named [UCP-worker-thread-3] but has failed to stop it. This is very likely to create a memory leak. Feb 08, 2016 8:00:25 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: The web application [/RatingService] appears to have started a thread named [Thread-438] but has failed to stop it. This is very likely to create a memory leak. Feb 27, 2016 6:15:14 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: The web application [/RatingService] appears to have started a thread named [oracle.jdbc.driver.BlockSource.ThreadedCachingBlockSource.BlockReleaser] but has failed to stop it. This is very likely to create a memory leak. Feb 27, 2016 6:15:14 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: The web application [/RatingService] appears to have started a thread named [ForkJoinPool.commonPool-worker-32] but has failed to stop it. This is very likely to create a memory leak. Feb 27, 2016 6:15:14 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads SEVERE: The web application [/RatingService] appears to have started a thread named [Timer-121] but has failed to stop it. This is very likely to create a memory leak. Correction made to code to try and fix issue: I added a ServletContextListener to our web service. On the contextDestroyed method we destroy the connection pools. Our web service uses 2 connection pools. I also upgraded to Tomcat 8 and the issue still occurred, but the messages are now warnings instead of SEVERE errors. I've searched the web and have tried many suggestions that have not helped except destroying the connection pools, but the issue still occurs. Please help!!! Thank you, Chris Brown Systems Consultant National Council on Compensation Insurance 901 Peninsula Corporate Circle Boca Raton, FL 33487-1362 (P) 561-893-2324 chris_br...@ncci.com ________________________________ The information contained in this e-mail message is intended only for the personal and confidential use of the recipient(s) named above. This message may be an attorney-client communication and/or work product and as such is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
