tomcat的两个错误提示

最新推荐文章于 2025-10-22 15:43:09 发布

最新推荐文章于 2025-10-22 15:43:09 发布 · 188 阅读

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本文解决了Tomcat6中出现的两个常见错误：重复加载com.mysql.jdbc.Driver导致的内存泄露和ThreadLocal未正确移除的问题。提供了具体的解决步骤。

今天tomcat 6遇到两个错误提示：
1.
严重: 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.

原因：重复加载了jar包。
解决方法：原来我在tomcat的lib文件夹放入了com.mysql.jdbc.Driver的jar包，而又在项目里面重复添加了，导致了上面的提示。删掉其中一个解决问题。

2.The web application [/snoopy] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@ea85b4]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@efeff8]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

原因：tomcat 6.026之后的版本加入了 memory leak detection feature（内存泄露检查）看如下原文：
There is a memory leak detection feature introduced in Tomcat 6.0.26 that attempts to log objects that have failed to be unregistered by webapps it hosts when they are stopped, and were forcibly unregistered by Tomcat. As Tomcat is forcibly removing these objects, it is not a serious concern that these log messages occur.

解决方法：在tomcat 的server.xml文件中将注释掉即可
PS：这是一个治标不治本的方法。