Tomcat6上で動作するGrailsアプリケーションが登録されたJBDCドライバの問題を報告しています

Question

Grailsでアプリケーションを開発しました。これは、GUI用のVaadinフレームワークを使用します。これは、Ubuntuサーバー上で動作しているTomcat6上で動作しています。

これらのレコードをログファイルで回避する方法はありますか？

SEVERE: The web application [/myapplication] 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. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@2818c2ce]) and a value of type [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@719d76f2]) and a value of type [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@18ec4424]) and a value of type [java.util.ArrayList] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@18ec4424]) and a value of type [java.util.ArrayList] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@18ec4424]) and a value of type [java.util.ArrayList] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@18ec4424]) and a value of type [java.util.ArrayList] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@2818c2ce]) and a value of type [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@719d76f2]) and a value of type [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.validation.HibernateDomainClassValidator$1@18ec4424]) and a value of type [java.util.ArrayList] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$2@2818c2ce]) and a value of type [java.lang.Integer] (value [0]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 
SEVERE: The web application [/myapplication] created a ThreadLocal with key of type [null] (value [org.codehaus.groovy.grails.orm.hibernate.support.HibernatePersistenceContextInterceptor$1@719d76f2]) and a value of type [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak. 
Dec 18, 2011 12:05:47 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 

Answer 1

これはTomcat6の問題です。 Tomcat7で修正する必要があります。 http://forum.springsource.org/showthread.php?84202-Installation-ThreadLocal-forcefully-removed