FAQ

FAQ - Atom Hopper

Question: When using Apache Tomcat I sometimes see the following entry in the log file: apache tomcat SEVERE: A web application registered the JBDC driver but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered

Answer: Apache Tomcat has built-in Memory Leak Protection which prevents any actual memory leakage in this scenario (as the message states). We've typically seen this message get logged when the database server is unreachable or when someone has updated the schema on the fly or dropped tables, etc. For more information you can also refer to this thread on Stackoverflow. We have not seen any memory leakage in our QA testing.