我在一个如此大的项目中有一个可序列化的类，而没有指定serialVersionUID，并将数据库MySQL保存为blob！
我必须在这个类中添加一些字段，但在这样做之后，我得到一个像这样的例外：
IOException: error when reading object
org.datanucleus.exceptions.NucleusUserException:
IOException: error when reading object at
org.datanucleus.store.rdbms.datatype.BlobImpl.getObject(BlobImpl.java:134)
.
.
..
Caused by: java.io.InvalidClassException:
local class incompatible: stream classdesc serialVersionUID = 1113799434508676095,
local class serialVersionUID = -8504143738844344601 at
java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:560)
这就是stackTrace：
IOException: error when reading object
org.datanucleus.exceptions.NucleusUserException: IOException: error when reading object
at org.datanucleus.store.rdbms.datatype.BlobImpl.getObject(BlobImpl.java:134)
at org.datanucleus.store.rdbms.mapping.AbstractLargeBinaryRDBMSMapping.getObject(AbstractLargeB inaryRDBMSMapping.java:271)
at org.datanucleus.store.mapped.mapping.SingleFieldMapping.getObject(SingleFieldMapping.java:21 9)
at org.datanucleus.store.rdbms.fieldmanager.ResultSetGetter.fetchObjectField(ResultSetGetter.java:153)
at org.datanucleus.state.AbstractStateManager.replacingObjectField(AbstractStateManager.java:1197)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationRecordImpl.jdoReplaceField(RAOrganizationRecordImpl.java)
at com.xxxxxxxx.xxxxxxxx.ra.impl.BaseRARecordImpl.jdoReplaceFields(BaseRARecordImpl.java)
at org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:2772)
at org.datanucleus.store.rdbms.query.PersistentIDROF$1.fetchFields(PersistentIDROF.java:441)
at org.datanucleus.state.JDOStateManagerImpl.loadFieldValues(JDOStateManagerImpl.java:841)
at org.datanucleus.state.JDOStateManagerImpl.initialiseForHollowAppId(JDOStateManagerImpl.java:284)
at org.datanucleus.state.StateManagerFactory.newStateManagerForHollowPopulatedAppId(StateManagerFactory.java:116)
at org.datanucleus.ObjectManagerImpl.findObjectUsingAID(ObjectManagerImpl.java:2117)
at org.datanucleus.store.rdbms.query.PersistentIDROF.getObjectForApplicationId(PersistentIDROF.java:435)
at org.datanucleus.store.rdbms.query.PersistentIDROF.getObject(PersistentIDROF.java:301)
at org.datanucleus.store.rdbms.query.ForwardQueryResult.nextResultSetElement(ForwardQueryResult.java:130)
at org.datanucleus.store.rdbms.query.ForwardQueryResult$QueryResultIterator.next(ForwardQueryResult.java:282)
at org.datanucleus.jdo.JDOPersistenceManager.detachCopyAll(JDOPersistenceManager.java:1176)
at org.datanucleus.jdo.JDOPersistenceManagerProxy.detachCopyAll(JDOPersistenceManagerProxy.java:166)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationStore.getRecords(RAOrganizationStore.java:136)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationManagerImpl.getRecords(RAOrganizationManagerImpl.java:174)
at com.xxxxxxxx.xxxxxxxx.admin.actions.OrganizationAction.browse(OrganizationAction.java:246)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.UrlInterceptor.intercept(UrlInterceptor.java:47)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.MonitoringInterceptor.intercept(MonitoringInterceptor.java:47)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:254)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.TransactionInterceptor.intercept(TransactionInterceptor.java:36)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.ExceptionInterceptor.intercept(ExceptionInterceptor.java:34)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.io.InvalidClassException: com.xxxxxxxx.xxxxxxxx.ra.RAOrganization; local class incompatible: stream classdesc serialVersionUID = -1666617984322225572, local class serialVersionUID = 6311293439415161861
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:560)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1599)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1494)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1748)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1327)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:349)
at org.datanucleus.store.rdbms.datatype.BlobImpl.getObject(BlobImpl.java:122)
... 102 more
Nested Throwables StackTrace:
java.io.InvalidClassException: com.xxxxxxxx.xxxxxxxx.ra.RAOrganization; local class incompatible: stream classdesc serialVersionUID = -1666617984322225572, local class serialVersionUID = 6311293439415161861
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:560)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1599)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1494)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1748)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1327)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:349)
at org.datanucleus.store.rdbms.datatype.BlobImpl.getObject(BlobImpl.java:122)
at org.datanucleus.store.rdbms.mapping.AbstractLargeBinaryRDBMSMapping.getObject(AbstractLargeBinaryRDBMSMapping.java:271)
at org.datanucleus.store.mapped.mapping.SingleFieldMapping.getObject(SingleFieldMapping.java:219)
at org.datanucleus.store.rdbms.fieldmanager.ResultSetGetter.fetchObjectField(ResultSetGetter.java:153)
at org.datanucleus.state.AbstractStateManager.replacingObjectField(AbstractStateManager.java:1197)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationRecordImpl.jdoReplaceField(RAOrganizationRecordImpl.java)
at com.xxxxxxxx.xxxxxxxx.ra.impl.BaseRARecordImpl.jdoReplaceFields(BaseRARecordImpl.java)
at org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:2772)
at org.datanucleus.store.rdbms.query.PersistentIDROF$1.fetchFields(PersistentIDROF.java:441)
at org.datanucleus.state.JDOStateManagerImpl.loadFieldValues(JDOStateManagerImpl.java:841)
at org.datanucleus.state.JDOStateManagerImpl.initialiseForHollowAppId(JDOStateManagerImpl.java:284)
at org.datanucleus.state.StateManagerFactory.newStateManagerForHollowPopulatedAppId(StateManagerFactory.java:116)
at org.datanucleus.ObjectManagerImpl.findObjectUsingAID(ObjectManagerImpl.java:2117)
at org.datanucleus.store.rdbms.query.PersistentIDROF.getObjectForApplicationId(PersistentIDROF.java:435)
at org.datanucleus.store.rdbms.query.PersistentIDROF.getObject(PersistentIDROF.java:301)
at org.datanucleus.store.rdbms.query.ForwardQueryResult.nextResultSetElement(ForwardQueryResult.java:130)
at org.datanucleus.store.rdbms.query.ForwardQueryResult$QueryResultIterator.next(ForwardQueryResult.java:282)
at org.datanucleus.jdo.JDOPersistenceManager.detachCopyAll(JDOPersistenceManager.java:1176)
at org.datanucleus.jdo.JDOPersistenceManagerProxy.detachCopyAll(JDOPersistenceManagerProxy.java:166)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationStore.getRecords(RAOrganizationStore.java:136)
at com.xxxxxxxx.xxxxxxxx.ra.impl.RAOrganizationManagerImpl.getRecords(RAOrganizationManagerImpl.java:174)
at com.xxxxxxxx.xxxxxxxx.admin.actions.OrganizationAction.browse(OrganizationAction.java:246)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.UrlInterceptor.intercept(UrlInterceptor.java:47)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.MonitoringInterceptor.intercept(MonitoringInterceptor.java:47)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:254)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.TransactionInterceptor.intercept(TransactionInterceptor.java:36)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.xxxxxxxx.xxxxxxxx.admin.interceptors.ExceptionInterceptor.intercept(ExceptionInterceptor.java:34)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
谁有解决此问题的想法。
答案 0 :(得分：8)
在相关类中定义成员：
private static final long serialVersionUID = 1113799434508676095L;
这解决了消息中描述的问题，强制本地类的serialVersionUID与序列化类的旧版本时放入流中的内容相匹配，这个版本可以通过各种类型自动计算如果当时没有serialVersionUUD字段，则为类属性。
您可能以不兼容的方式更改了类，这将产生不同的异常。有关详细信息，请参阅有关版本控制的对象序列规范章节。然而，仅仅添加或删除字段并没有产生这种效果。
答案 1 :(得分：1)
您可以在对象类中实现私有readObject（ObjectInputStream in）。它有点“覆盖”默认行为，即使它被声明为“私有”，所以在技术上它不应该。基本上，当java序列化程序需要从实现此方法的类的流中读取对象时，它将调用该对象而不是执行其默认操作。
因此，您可以在其中实现一个逻辑，它将读取流中的所有现有字段，并为缺少的字段分配默认值。
编辑：正如@EJP指出的那样（感谢@EJP！），这不太有用。您还需要在类中定义private static long serialVersionUID，并将其设置为您在异常中看到的“旧”值。
另外，考虑将Serializable替换为Externalizable，它可以为您提供更多的灵活性和透明度。扩展Externalizable告诉java你打算自己处理序列化，然后它不会尝试执行抛出异常的默认事件。
在这种情况下，实现readExternal(ObjectInputStream in)逐个读取流中的成员，并初始化那些缺少某些默认值的成员。