Tomcat Warning Logs

Mar 26, 2011 6:47:39 PM org.apache.catalina.startup.HostConfig checkResources
INFO: Reloading context [/ExtraCare]
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/ExtraCare] registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/ExtraCare] 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.
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/ExtraCare] created a ThreadLocal with key of type [null] (value [net.sf.jasperreports.engine.util.JRFontUtil$1@1ae8b08]) and a value of type [java.util.HashSet] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/ExtraCare] created a ThreadLocal with key of type [null] (value [net.sf.jasperreports.engine.util.JRFontUtil$1@1ae8b08]) and a value of type [java.util.HashSet] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/ExtraCare] created a ThreadLocal with key of type [null] (value [net.sf.jasperreports.engine.util.JRFontUtil$1@1ae8b08]) and a value of type [java.util.HashSet] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
Mar 26, 2011 6:47:39 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/ExtraCare] created a ThreadLocal with key of type [null] (value [net.sf.jasperreports.engine.util.JRFontUtil$1@1ae8b08]) and a value of type [java.util.HashSet] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.