转自：http://www.blogjava.net/apple0668/archive/2007/10/12/152383.html
Tomcat启动时如下错误：
严重: IOException while loading persisted sessions: java.io.EOFException
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:)
at org.apache.catalina.util.CustomObjectInputStream.<init>(CustomObjectInputStream.java:)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:)
at org.apache.catalina.session.StandardManager.start(StandardManager.java:)
at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:)
at org.apache.catalina.core.StandardService.start(StandardService.java:)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:)
at org.apache.catalina.startup.Catalina.start(Catalina.java:)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)
at java.lang.reflect.Method.invoke(Method.java:)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:)
原因：
EOFException表示输入过程中意外地到达文件尾或流尾的信号,导致从 session中获取数据失败。异常是tomcat本身的问题，由于tomcat上次非正常关闭时有一些活动session被持久化（表现为一些临时文 件），在重启时，tomcat尝试去恢复这些session的持久化数据但又读取失败造成的。此异常不影响系统的使用。 解决办法：
将Tomcat 6.0\work下的文件清空，主要是*.ser文件，或者只是删除掉session.ser，重启tomcat，即可以解决。