我们有一个在JBoss 4.2.3上运行的应用程序,使用
Spring 2.5.2和Hibernate 3.2.6.ga.这是运行在
Linux JEE01 2.6.16.60-0.54.5-smp上,使用自己的用户.在另一台机器上写入Oracle 10G数据库.
我们使用标准视图 – >服务 – >道分层.每个dao用@Repository注释的地方.
这一切都在全天候运行,没有许多问题,但是每隔几天,有时候有一段时间,整个系统进入一个坏的状态,没有什么可以写入数据库了.这些堆栈跟踪出现在日志中：
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not
allowed in read-only mode (FlushMode.NEVER/MANUAL):
Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction
definition.
我们扫描完整的系统,系统中有一个位置,其中flush模式暂时设置为MANUAL,之后finally块将其设置回原始值.这是因为我们不想在运行此查询之前将状态刷新到数据库.所以我们不能很容易地改变.正常的FlushMode设置为AUTO,并且在几个地方我们临时将其设置为COMMIT并将其重新切换回默认值.
只有服务器启动才能将系统恢复到正常工作状态.
问题是：为什么系统将所有事务设置为只读/手动刷新模式？我google了,但找不到解决方案.
这是我们的spring和hibernate配置(只有相关部分显示)：
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionfactorybean"> <property name="dataSource"> <ref bean="datasourceName" /> </property> <property name="configLocation"> <value>classpath:hibernate.cfg.xml</value> </property> </bean> <bean id="hibernateInterceptor" class="org.springframework.orm.hibernate3.HibernateInterceptor"> <property name="sessionFactory" ref="sessionFactory" /> </bean> <tx:annotation-driven transaction-manager="txManager" /> <tx:advice id="txAdvice" transaction-manager="txManager" > <!-- the transactional semantics... --> <tx:attributes > <!-- all methods starting with 'get' are read-only --> <tx:method name="approve*" read-only="false" propagation="required" rollback-for="java.lang.Exception" /> <tx:method name="update*" read-only="false" propagation="required" rollback-for="java.lang.Exception"/> <tx:method name="save*" read-only="false" propagation="required" rollback-for="java.lang.Exception"/> <tx:method name="delete*" read-only="false" propagation="required" rollback-for="java.lang.Exception" /> <!-- other methods use the default transaction settings (see below) --> <tx:method name="*" read-only="true" propagation="required" /> </tx:attributes> </tx:advice> <aop:config> <aop:pointcut id="serviceMethods" expression="execution(* com.myapplication.service.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethods" /> </aop:config> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" > <property name="sessionFactory" ref="sessionFactory" /> </bean> -- end of spring config -- -- hibernate configuation -- <hibernate-configuration> <session-factory name=""> <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property> <property name="show_sql">false</property> <property name="use_outer_join">false</property> <property name="hibernate.cache.use_query_cache">true</property> <property name="hibernate.cache.use_second_level_cache">true</property> <property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property> <property name="hibernate.connection.SetBigStringTryClob">true</property> <property name="hibernate.jdbc.batch_size">0</property> </session-factory> <mapping ----/> </hibernate-configuration>
这是堆栈跟踪：
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition. at org.springframework.orm.hibernate3.HibernateTemplate.checkWriteOperationAllowed(HibernateTemplate.java:1137) at org.springframework.orm.hibernate3.HibernateTemplate$16.doInHibernate(HibernateTemplate.java:701) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:374) at org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdate(HibernateTemplate.java:699) at nl.company.myapp.dao.impl.GenericDAOImpl.save(GenericDAOImpl.java:94) at nl.company.myapp.dao.impl.CallDAOImpl.save(CallDAOImpl.java:266) at nl.company.myapp.dao.impl.CallDAOImpl.save(CallDAOImpl.java:47) at nl.company.myapp.service.impl.CallServiceImpl.saveCall(CallServiceImpl.java:98) 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:592) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) at $Proxy142.saveCall(Unknown Source) at nl.company.myapp.view.bean.call.CallDetailBean.doSave(CallDetailBean.java:319) at nl.company.myapp.view.bean.EditModeAwareBean.save(EditModeAwareBean.java:151) at sun.reflect.GeneratedMethodAccessor472.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.apache.el.parser.AstValue.invoke(AstValue.java:131) at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:46) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:458) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:763) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at nl.company.myapp.view.audit.AuditFilter.doFilter(AuditFilter.java:88) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:238) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:195) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:138) at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265) at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107) at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.ui.logout.logoutFilter.doFilter(logoutFilter.java:110) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249) at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149) at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437) at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) at java.lang.Thread.run(Thread.java:595)
这一切都很好
解决方法
这个异常来自Spring的HibernateTemplate类中的以下代码：
protected void checkWriteOperationAllowed(Session session) throws InvalidDataAccessApiUsageException {
if (isCheckWriteOperations() && getFlushMode() != FLUSH_EAGER &&
session.getFlushMode().lessThan(FlushMode.COMMIT)) {
throw new InvalidDataAccessApiUsageException(
"Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): "+
"Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.");
}
}
这个支票的理由是explained：
This is a new consistency check
introduced in Spring 1.1.Invoking HibernateTemplate’s
save/update/delete methods on a
Spring-managed Session in
FlushMode.NEVER is potentially
dangerous: It means that you are:
either doing this in a Spring-managed
read-only transaction,which will
never flush the Hibernate Session,
i.e. never flush your
save/update/delete calls. The new
check makes you aware that you won’t
persist your changes in that
situation.or working with some other
thread-bound Session in
FlushMode.NEVER,for example the
OpenSessionInViewFilter. If you’re
overriding closeSession there to flush
after view rendering,you should
override getSession too,setting the
Session to FlushMode.AUTO.I strongly
recommend against the latter,though.
If you’re using
OpenSessionInViewFilter,combine it
with middle tier transactions rather
than let the filter flush at request
completion.
有没有这个铃响？
有可能在您的代码或Spring ORM中存在一些错误.要禁用此检查,您可以调用setCheckWriteOperations(false).
