異常信息如下：

2010-2-4?11:53:55?org.apache.catalina.startup.HostConfig?checkResources
信息:?Reloading?context?[/ssh]
2010-2-4?11:53:55?org.apache.catalina.core.ApplicationContext?log
信息:?Closing?Spring?root?WebApplicationContext
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearReferencesJdbc
嚴重:?A?web?application?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.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[null]?(value?[com.opensymphony.xwork2.inject.ContainerImpl$10@12c937c])?and?a?value?of?type?[java.lang.Object[]]?(value?[[Ljava.lang.Object;@186dd93])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[org.springframework.core.NamedThreadLocal]?(value?[Prototype?beans?currently?in?creation])?and?a?value?of?type?[null]?(value?[null])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[null]?(value?[com.sun.faces.config.ConfigureListener$1@13d0fea])?and?a?value?of?type?[null]?(value?[null])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[null]?(value?[com.opensymphony.xwork2.inject.ContainerImpl$10@12c937c])?and?a?value?of?type?[java.lang.Object[]]?(value?[[Ljava.lang.Object;@1dffb78])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[org.springframework.core.NamedThreadLocal]?(value?[Actual?transaction?active])?and?a?value?of?type?[null]?(value?[null])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap
嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[null]?(value?[com.opensymphony.xwork2.inject.ContainerImpl$10@12c937c])?and?a?value?of?type?[java.lang.Object[]]?(value?[[Ljava.lang.Object;@1f6ae4d])?but?failed?to?remove?it?when?the?web?application?was?stopped.?To?prevent?a?memory?leak,?the?ThreadLocal?has?been?forcibly?removed.
2010-2-4?11:53:55?org.apache.catalina.loader.WebappClassLoader?clearThreadLocalMap

嚴重:?A?web?application?created?a?ThreadLocal?with?key?of?type?[org.springframework.core.NamedThreadLocal]?

解決辦法可參考http://forum.springsource.org/showthread.php?87335-Failure-to-unregister-the-MySQL-JDBC-Driver

把JDBC驅動復制到tomcat/lib 目錄下

當項目沒有stop時，redeploy產生的問題

總結

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