远程服务器重新启动后远程EJB的InitialContext.lookup失败

时间：2010-10-14 19:20:16

标签： java-ee glassfish ejb iiop

我们有一个设置，其中EJB A在服务器A上运行，另一个EJB B在服务器B上运行.EJB A通过IIOP连接到EJB B.此设置通常有效，但如果重新启动服务器B，EJB A将失败，直到服务器A重新启动。

问题是，如果重新启动服务器B，EJB A对InitialContext.lookup的所有调用都会失败，并出现“java.io.IOException：End-of-stream”异常，直到服务器A重新启动。我无法找到有关我们的应用服务器（GlassFish）是否对InitialContext.lookup进行任何缓存的信息。在服务器重启之前，还有其他原因导致查找失败吗？如果InitialContext.lookup确实缓存了连接，我该如何解决这个问题呢？

我们的服务器运行Sun Application Server 9.1。查找实际上是通过org.springframework.jndi.JndiTemplate完成的，但堆栈跟踪表明JndiTemplate正在调用InitialContext.lookup（）。

感谢您的任何见解。

P.S。我应该澄清一下，我正在试图弄清楚每次重启服务器B时是否可以避免重启服务器A.

JndiTemplate的定义（一些文字用'x'和'＃'涂黑）

<bean id="xxxxxxxxxx"  class="org.springframework.jndi.JndiTemplate">
  <property name="environment">
   <props>
    <prop key="java.naming.factory.url.pkgs">com.sun.enterprise.naming</prop>
    <prop key="java.naming.factory.initial">com.sun.enterprise.naming.SerialInitContextFactory</prop>
    <prop key="java.naming.provider.url">iiop://xxxxxxxxxx:####</prop>
    <prop key="java.naming.factory.state">com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl</prop>
    <prop key="org.omg.CORBA.ORBInitialHost">xxxxxxxxxx</prop>
    <prop key="org.omg.CORBA.ORBInitialPort">####</prop>
   </props>
  </property>
 </bean>

堆栈跟踪（一部分替换为'[application methods]'）：

NAM0004: Exception during name lookup : {0}
java.rmi.MarshalException: CORBA COMM_FAILURE 1398079696 Maybe; nested exception is: 
 org.omg.CORBA.COMM_FAILURE:   vmcid: SUN  minor code: 208 completed: Maybe
 at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:271)
 at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:205)
 at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152)
 at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(BCELStubBase.java:225)
 at com.sun.enterprise.naming._SerialContextProvider_DynamicStub.lookup(com/sun/enterprise/naming/_SerialContextProvider_DynamicStub.java)
 at com.sun.enterprise.naming.SerialContext.lookup(SerialContext.java:398)
 at javax.naming.InitialContext.lookup(InitialContext.java:351)
 at org.springframework.jndi.JndiTemplate$1.doInContext(JndiTemplate.java:155)
 at org.springframework.jndi.JndiTemplate.execute(JndiTemplate.java:88)
 at org.springframework.jndi.JndiTemplate.lookup(JndiTemplate.java:153)
 at [application methods]
 at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:267)
 at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265)
 at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
 at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
 at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:299)
 at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
 at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
 at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
 at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
 at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
 at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
 at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
 at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
 at com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.process(SSLReadTask.java:440)
 at com.sun.enterprise.web.connector.grizzly.ssl.SSLReadTask.doTask(SSLReadTask.java:228)
 at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
 at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
Caused by: org.omg.CORBA.COMM_FAILURE:   vmcid: SUN  minor code: 208 completed: Maybe
 at com.sun.corba.ee.impl.logging.ORBUtilSystemException.connectionAbort(ORBUtilSystemException.java:2862)
 at com.sun.corba.ee.impl.logging.ORBUtilSystemException.connectionAbort(ORBUtilSystemException.java:2880)
 at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doOptimizedReadStrategy(SocketOrChannelConnectionImpl.java:1788)
 at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doWork(SocketOrChannelConnectionImpl.java:1263)
 at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:555)
Caused by: org.omg.CORBA.COMM_FAILURE:   vmcid: SUN  minor code: 211  completed: No
 at com.sun.corba.ee.impl.logging.ORBUtilSystemException.ioexceptionWhenReadingConnection(ORBUtilSystemException.java:2946)
 at com.sun.corba.ee.impl.logging.ORBUtilSystemException.ioexceptionWhenReadingConnection(ORBUtilSystemException.java:2965)
 at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.nonBlockingRead(SocketOrChannelConnectionImpl.java:2000)
 at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doOptimizedReadStrategy(SocketOrChannelConnectionImpl.java:1713)
 ... 2 more
Caused by: java.io.IOException: End-of-stream
 at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.nonBlockingRead(SocketOrChannelConnectionImpl.java:1989)
 ... 3 more

2 个答案:

答案 0 :(得分：0)

通过堆栈跟踪，我可以得出结论，Spring Framework本身不会缓存 - 它实际上会调用InitialContext.lookup()。但是，堆栈跟踪和错误代码意味着存在连接中断。

WebSphere过去曾经有类似的错误，自那时起就被修复了。原来是应用程序服务器本身完成的缓存问题。我怀疑SunAS在9.1中有类似的错误......

艾萨克

答案 1 :(得分：0)

方法syncChanges（）定期运行以进行同步。主要思想是在发生错误时关闭上下文（在重新启动服务器以获取示例后）并重新初始化它。在使用方法context.close（）关闭上下文后，您应该将其置零值。

public class SyncOperationsService {
    private InitialContext context;
    private SyncOperationsRemote syncOperationsRemote = null; //RemoteBean

    public String syncChanges() {
        try {
            if (context == null) {
                context = new InitialContext(properties);
            }

            if (context != null) {
                syncOperationsRemote = (SyncOperationsRemote) context.lookup("PathToYourRemoteBean");
            }

            result = syncOperationsRemote.syncChanges(dbImportList);  //Try execute remote bean

        } catch (Exception e) {
            log.error(e.getMessage());

            try {
                context.close();
            } catch (Exception e2) {
                log.error(e2.getMessage());
            }
            context = null;
        }
    }
}
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