网站的后台一打开就显示这个错误，之前是正常的，

哪个版本系统，有完整一点的报错吗

HTTP Status 500 - Request processing failed; nested exception is org.hibernate.exception.GenericJDBCException: could not load an entity: [com.jeecms.cms.entity.main.CmsSite#1]

type Exception report

message Request processing failed; nested exception is org.hibernate.exception.GenericJDBCException: could not load an entity: [com.jeecms.cms.entity.main.CmsSite#1]

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.exception.GenericJDBCException: could not load an entity: [com.jeecms.cms.entity.main.CmsSite#1]
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35)

root cause

org.hibernate.exception.GenericJDBCException: could not load an entity: [com.jeecms.cms.entity.main.CmsSite#1]
org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126)
org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
org.hibernate.loader.Loader.loadEntity(Loader.java:1899)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:71)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:65)
org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3062)
org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:434)
org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:415)
org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:165)
org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:223)
org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:906)
org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:874)
org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:590)
org.hibernate.type.ManyToOneType.assemble(ManyToOneType.java:219)
org.hibernate.cache.StandardQueryCache.get(StandardQueryCache.java:155)
org.hibernate.loader.Loader.getResultFromQueryCache(Loader.java:2188)
org.hibernate.loader.Loader.listUsingQueryCache(Loader.java:2151)
org.hibernate.loader.Loader.list(Loader.java:2121)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363)
org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149)
org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
com.jeecms.cms.dao.main.impl.CmsSiteDaoImpl.getList(CmsSiteDaoImpl.java:25)
com.jeecms.cms.manager.main.impl.CmsSiteMngImpl.getListFromCache(CmsSiteMngImpl.java:37)
sun.reflect.GeneratedMethodAccessor192.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
com.sun.proxy.$Proxy19.getListFromCache(Unknown Source)
com.jeecms.cms.web.AdminContextInterceptor.getByDefault(AdminContextInterceptor.java:230)
com.jeecms.cms.web.AdminContextInterceptor.getSite(AdminContextInterceptor.java:176)
com.jeecms.cms.web.AdminContextInterceptor.preHandle(AdminContextInterceptor.java:46)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:781)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35)

root cause

com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1377 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.
com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3223)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1938)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2107)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2648)
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2086)
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2237)
com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
org.hibernate.loader.Loader.doQuery(Loader.java:697)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
org.hibernate.loader.Loader.loadEntity(Loader.java:1885)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:71)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:65)
org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3062)
org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:434)
org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:415)
org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:165)
org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:223)
org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:906)
org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:874)
org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:590)
org.hibernate.type.ManyToOneType.assemble(ManyToOneType.java:219)
org.hibernate.cache.StandardQueryCache.get(StandardQueryCache.java:155)
org.hibernate.loader.Loader.getResultFromQueryCache(Loader.java:2188)
org.hibernate.loader.Loader.listUsingQueryCache(Loader.java:2151)
org.hibernate.loader.Loader.list(Loader.java:2121)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363)
org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149)
org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
com.jeecms.cms.dao.main.impl.CmsSiteDaoImpl.getList(CmsSiteDaoImpl.java:25)
com.jeecms.cms.manager.main.impl.CmsSiteMngImpl.getListFromCache(CmsSiteMngImpl.java:37)
sun.reflect.GeneratedMethodAccessor192.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
com.sun.proxy.$Proxy19.getListFromCache(Unknown Source)
com.jeecms.cms.web.AdminContextInterceptor.getByDefault(AdminContextInterceptor.java:230)
com.jeecms.cms.web.AdminContextInterceptor.getSite(AdminContextInterceptor.java:176)
com.jeecms.cms.web.AdminContextInterceptor.preHandle(AdminContextInterceptor.java:46)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:781)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0* logs.
Apache Tomcat/7.0*

哪个版本系统，你是不是做了二次开发

回复第2楼版本型号在哪里可以看到

只有后台才能看，你自己不记得了吗？

我只是修改了一下首页模板，去掉了一些没用的空链接，还有样式表里修改了一点

哪个版本系统，重启下试试看

回复第8楼是重启服务器吗？我查了一下，是不是和数据库连接有关？（根据这一段搜索的：org.hibernate.exception.GenericJDBCException）

是的，你可以数据库服务也重启下