<<<<<<<<<<高手帮我解答一下。。。是session问题吗？>>>>>>>>>>>>>

Question

2005-2-16 9:37:30 org.apache.catalina.session.StandardManager doLoad
严重: IOException while loading persisted sessions: java.io.WriteAbortedExceptio
n: writing aborted; java.io.NotSerializableException: com.hwtt.er.model.Departme
nt
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException
: com.hwtt.er.model.Department
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1278)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at java.util.ArrayList.readObject(ArrayList.java:547)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:838
)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.apache.catalina.session.StandardSession.readObject(StandardSessio
n.java:1342)
        at org.apache.catalina.session.StandardSession.readObjectData(StandardSe
ssion.java:885)
        at org.apache.catalina.session.StandardManager.doLoad(StandardManager.ja
va:416)
        at org.apache.catalina.session.StandardManager.load(StandardManager.java
:343)
        at org.apache.catalina.session.StandardManager.start(StandardManager.jav
a:657)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
294)
        at org.apache.catalina.core.StandardContext.reload(StandardContext.java:
3043)
        at org.apache.catalina.manager.ManagerServlet.reload(ManagerServlet.java
:1014)
        at org.apache.catalina.manager.HTMLManagerServlet.reload(HTMLManagerServ
let.java:476)
        at org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServl
et.java:98)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:157)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(Standard
ContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:540)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:118)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16
0)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:799)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:705)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:577)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:683)
        at java.lang.Thread.run(Thread.java:534)
Caused by: java.io.NotSerializableException: com.hwtt.er.model.Department
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at java.util.ArrayList.writeObject(ArrayList.java:529)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:80
9)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:12
96)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
a:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at org.apache.catalina.session.StandardSession.writeObject(StandardSessi
on.java:1415)
        at org.apache.catalina.session.StandardSession.writeObjectData(StandardS
ession.java:902)
        at org.apache.catalina.session.StandardManager.doUnload(StandardManager.
java:539)
        at org.apache.catalina.session.StandardManager.unload(StandardManager.ja
va:485)
        at org.apache.catalina.session.StandardManager.stop(StandardManager.java
:687)
        at org.apache.catalina.core.StandardContext.stop(StandardContext.java:44
96)
        at org.apache.catalina.core.StandardContext.reload(StandardContext.java:
3037)
        ... 31 more
2005-2-16 9:37:30 org.apache.catalina.session.StandardManager start
........
这个是什么问题呢？是Session失效引起的吗？请高手帮忙解答啊，谢谢！！