Tomcat 在启动报错，StandardManager.startInternal Exception，不知道是什么原因，怎么解决？在网上查到，说这个问题是什么因为Tomcat关闭的时候，session出现异常，解决方案就是讲Tomcat下的work目录下的东西删除了，但是这个方案只是临时的方案，想请教一下这个问题！

28-Sep-2018 10:46:39.002 SEVERE [localhost-startStop-1] org.apache.catalina.session.StandardManager.startInternal Exception loading sessions from persistent storage
 java.lang.ClassCastException: java.lang.String cannot be cast to java.io.ObjectStreamClass
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1515)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1781)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
	at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1714)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018)
	at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:503)
	at java.util.concurrent.ConcurrentHashMap.readObject(ConcurrentHashMap.java:1438)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1909)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
	at org.apache.catalina.session.StandardSession.doReadObject(StandardSession.java:1624)
	at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1090)
	at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:218)
	at org.apache.catalina.session.StandardManager.load(StandardManager.java:162)
	at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:356)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5380)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1410)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1400)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)