Tomcat启动时报ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: com.xxx.pojo.Admin错误

郁闷啊。。。

小弟用Eclipse开发的时候（用SSH2框架），每写几句话就保存代码（tomcat已经在运行，并且启动的时候完全正常），多保存几次就出问题了。。。。一开始是报PermGen space内存溢出的错误，报了一个多月之后，就开始报这个错误了：、

ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: com.xxx.pojo.Admin

具体的报错如下：

严重: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: com.xxx.pojo.Admin
java.lang.ClassNotFoundException: com.xxx.pojo.Admin
 at java.net.URLClassLoader$1.run(Unknown Source)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClassInternal(Unknown Source)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Unknown Source)
 at java.io.ObjectInputStream.resolveClass(Unknown Source)
 at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
 at java.io.ObjectInputStream.readClassDesc(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.readObject(Unknown Source)
 at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1441)
 at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:942)
 at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
 at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
 at org.apache.catalina.session.StandardManager.start(StandardManager.java:637)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4351)
 at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3099)
 at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:404)
 at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
 at java.lang.Thread.run(Unknown Source)
2010-10-25 10:38:14 org.apache.catalina.session.StandardManager start
严重: Exception loading sessions from persistent storage
java.lang.ClassNotFoundException: com.uec.pojo.Admin
 at java.net.URLClassLoader$1.run(Unknown Source)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClassInternal(Unknown Source)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Unknown Source)
 at java.io.ObjectInputStream.resolveClass(Unknown Source)
 at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
 at java.io.ObjectInputStream.readClassDesc(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.readObject(Unknown Source)
 at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1441)
 at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:942)
 at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
 at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
 at org.apache.catalina.session.StandardManager.start(StandardManager.java:637)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4351)
 at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3099)
 at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:404)
 at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
 at java.lang.Thread.run(Unknown Source)
2010-10-25 10:38:14 org.apache.catalina.core.StandardContext start

 

请问各位大侠如何解决这个问题。。。。感激万分。。。