Memory Leak in tomcat

To prevent this particular memory leak you should edit your tomcat/conf/server.xml and change

<Listener  lassName="org.apache.catalina.core.JreMemoryLeakPreventionListener" />

to

<Listener 
className="org.apache.catalina.core.JreMemoryLeakPreventionListener"
classesToInitialize="com.mysql.jdbc.NonRegisteringDriver" />