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。它使用自己的用户在 Linux JEE01 2.6.16.60-0.54.5-smp 上运行。写入另一台机器上的 Oracle 10G 数据库。

我们使用标准 View -> 服务 -> 道分层。每个 dao 都使用 @Repository 进行注释。

这一切都在 24/7 全天候运行，没有太多问题，但是每隔几天，有时甚至一天几次，整个系统就会进入一个糟糕的状态，无法再将任何内容写入数据库。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.

我们扫描了整个系统，在系统中的某个地方，flushmode 被临时设置为 MANUAL，之后，finally block 将其设置回原来的值。这是因为我们不想在此查询运行之前将状态刷新到数据库。所以我们不能轻易改变这一点。正常的 FlushMode 设置为 AUTO，在几个地方我们暂时将其设置为 COMMIT 并再次将其切换回默认值。

只有重新启动服务器才能将系统恢复到工作状态。

问题是:为什么系统将所有事务设置为只读/手动刷新模式？我用谷歌搜索了这个，但找不到解决方案。

这是我们的 spring 和 hibernate 配置(仅显示相关部分):

     <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)

一切正常

最佳答案

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.");
    }
}

这项检查的理由是explained如:

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.

这会敲响警钟吗？

您的代码或 Spring ORM 中可能存在一些错误。要禁用此检查，您可以调用 setCheckWriteOperations(false) .

https://stackoverflow.com/questions/4448520/