어느날부터인가 톰켓을 재시작할려고 하면 아래와 같은 에러 메세지가 주욱 출력됩니다.

어느날부터인가 톰켓을 재시작할려고 하면 아래와 같은 에러 메세지가 주욱 출력됩니다.
저의 서버환경은
ubuntu 12.04
tomcat6 + ibatis + spring 입니다.
답을 알수 없어 도움을 요청합니다.
고수님들의 조언 부탁드립니다.

2014. 1. 9 오후 5:52:32 org.apache.coyote.http11.Http11Protocol pause
정보: Pausing Coyote HTTP/1.1 on http-8080
2014. 1. 9 오후 5:52:33 org.apache.catalina.core.StandardService stop
정보: Stopping service Catalina
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [/www] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-1] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [/www] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-2] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [/www] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-3] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [/www] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-4] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [/www] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-5] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-1] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-2] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-3] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-4] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [org.springframework.scheduling.quartz.SchedulerFactoryBean#0_Worker-5] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [File Reaper] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
심각: The web application [] appears to have started a thread named [Thread-45760] but has failed to stop it. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@558f7c04]) and a value of type [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil.FactorySettings] (value [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil$FactorySettings@3f17167e]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@4c5ca8e]) and a value of type [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl] (value [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@55753314]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@558f7c04]) and a value of type [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil.FactorySettings] (value [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil$FactorySettings@16c91e1]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@4c5ca8e]) and a value of type [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl] (value [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@7edd4b81]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@558f7c04]) and a value of type [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil.FactorySettings] (value [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil$FactorySettings@72884338]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@4c5ca8e]) and a value of type [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl] (value [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@4ff54c46]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@558f7c04]) and a value of type [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil.FactorySettings] (value [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil$FactorySettings@7162b0ac]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@4c5ca8e]) and a value of type [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl] (value [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@63d265c]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2014. 1. 9 오후 5:52:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
심각: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@558f7c04]) and a value of type [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil.FactorySettings] (value [com.ibatis.sqlmap.engine.mapping.result.ResultObjectFactoryUtil$FactorySettings@18a16537]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.