Java tomcate启动异常

Deployment failure on Tomcat? 6.x. Could not copy all resources to C:\Program Files\apache-tomcat-6.0.20\webapps\etdcrm. If a file is locked, you can wait until the lock times out to redeploy, or stop the server and redeploy, or manually remove the deployment at C:\Program Files\apache-tomcat-6.0.20\webapps\etdcrm

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一直用tomcat一段时间都正常无事，最近一次启动tomcat就发生以下异常：

严重: IOException while loading persisted sessions: java.io.EOFException
严重: Exception loading sessions from persistent storage

原因是tomcat对硬盘的session读取失败，彻底解决办法一下：将work下面的文件清空，主要是*.ser文件，或者只是删除掉session.ser即可以解决。

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解决方案：见附件图片