5

使用 Glassfish 3.0.1 ... 如果我有一个 Web 应用程序远程访问另一个应用程序中的 EJB，并且重新部署了包含 EJB 的远程应用程序，我会得到一个 javax.ejb.NoSuchEJBException（参见下面的堆栈跟踪）。

这不应该工作吗？我可以看到有问题的 EJB 已成功部署，使用完全相同的 JNDI 名称。

除了重新启动 Web 应用程序之外，还有其他方法可以解决此问题吗？应该注意的是，在这个堆栈跟踪来自的特定示例中，我正在访问一个使用 CDI 注入 bean 的 servlet：

public class StatusServlet extends HttpServlet {

    @Inject
    private StatusService statusService;

    @Override
    public void doGet(final HttpServletRequest req, final HttpServletResponse res) throws IOException {
        res.getWriter().write(statusService.getStatus());
    }
}

注入是使用以下生产者完成的，以获得正确的 EJB：

public class StatusServiceProducer extends AbstractServiceProducer {

 @EJB(name = "StatusService")
 private StatusService service;

 @Produces
 public StatusService getService(final InjectionPoint ip) {
  return service;
 }

}

生产者用于更容易将服务包装在代理中，并更容易更改 EJB 的查找方式。

StatusService 接口和实现如下：

@Stateless(name = "StatusService")
public class StatusServiceImpl implements StatusService {
    private static final String OK = "OK";

    public String getStatus() {
        // Some code
        return OK;
    }
}
public interface StatusService {
 String getStatus();
}

编辑：提供了我自己可能的解决方案。有更好的吗？

完整的堆栈跟踪：

[#|2011-01-12T10:45:28.273+0100|WARNING|glassfish3.0.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=50;_ThreadName=http-thread-pool-8080-(1);|StandardWrapperValve[Load
Balancer status servlet]: PWC1406: Servlet.service() for servlet Load
Balancer status servlet threw exception
javax.ejb.NoSuchEJBException
       at org.example.service._StatusService_Wrapper.getStatus(org/example/service/_StatusService_Wrapper.java)
       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 no.evote.service.cache.ServiceInvocationHandler.invoke(ServiceInvocationHandler.java:34)
       at $Proxy760.getStatus(Unknown Source)
       at no.evote.presentation.StatusServlet.doGet(StatusServlet.java:25)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
       at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at net.balusc.http.multipart.MultipartFilter.doFilter(MultipartFilter.java:78)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
       at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
       at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
       at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
       at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
       at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
       at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
       at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
       at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
       at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
       at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
       at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
       at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
       at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
       at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
       at java.lang.Thread.run(Thread.java:662)
Caused by: java.rmi.NoSuchObjectException: CORBA OBJECT_NOT_EXIST
1330446338 No; nested exception is:
       org.omg.CORBA.OBJECT_NOT_EXIST: ----------BEGIN server-side stack
trace----------
org.omg.CORBA.OBJECT_NOT_EXIST:   vmcid: OMG  minor code: 2  completed: No
       at com.sun.corba.ee.impl.logging.OMGSystemException.noObjectAdaptor(OMGSystemException.java:3457)
       at com.sun.corba.ee.impl.logging.OMGSystemException.noObjectAdaptor(OMGSystemException.java:3475)
       at com.sun.corba.ee.impl.oa.poa.POAFactory.find(POAFactory.java:222)
       at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.findObjectAdapter(CorbaServerRequestDispatcherImpl.java:450)
       at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:209)
       at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1841)
       at com.sun.corba.ee.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:119)
       at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:235)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:187)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:147)
       at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:225)
       at no.evote.service.__StatusService_Remote_DynamicStub.getStatus(no/evote/service/__StatusService_Remote_DynamicStub.java)
       at no.evote.service._StatusService_Wrapper.getStatus(no/evote/service/_StatusService_Wrapper.java)
       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 no.evote.service.cache.ServiceInvocationHandler.invoke(ServiceInvocationHandler.java:34)
       at $Proxy760.getStatus(Unknown Source)
       at no.evote.presentation.StatusServlet.doGet(StatusServlet.java:25)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
       at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at net.balusc.http.multipart.MultipartFilter.doFilter(MultipartFilter.java:78)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
       at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
       at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
       at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
       at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
       at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
       at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
       at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
       at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
       at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
       at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
       at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
       at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
       at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
       at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
       at java.lang.Thread.run(Thread.java:662)
Caused by: org.omg.PortableServer.POAPackage.AdapterNonExistent:
IDL:omg.org/PortableServer/POA/AdapterNonExistent:1.0
       at com.sun.corba.ee.impl.oa.poa.POAImpl.find_POA(POAImpl.java:1057)
       at com.sun.corba.ee.impl.oa.poa.POAFactory.find(POAFactory.java:218)
       ... 48 more

----------END server-side stack trace----------  vmcid: OMG  minor
code: 2  completed: No
       at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:280)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:200)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:147)
       at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:225)
       at no.evote.service.__StatusService_Remote_DynamicStub.getStatus(no/evote/service/__StatusService_Remote_DynamicStub.java)
       ... 39 more
Caused by: org.omg.CORBA.OBJECT_NOT_EXIST: ----------BEGIN server-side
stack trace----------
org.omg.CORBA.OBJECT_NOT_EXIST:   vmcid: OMG  minor code: 2  completed: No
       at com.sun.corba.ee.impl.logging.OMGSystemException.noObjectAdaptor(OMGSystemException.java:3457)
       at com.sun.corba.ee.impl.logging.OMGSystemException.noObjectAdaptor(OMGSystemException.java:3475)
       at com.sun.corba.ee.impl.oa.poa.POAFactory.find(POAFactory.java:222)
       at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.findObjectAdapter(CorbaServerRequestDispatcherImpl.java:450)
       at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:209)
       at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1841)
       at com.sun.corba.ee.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:119)
       at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:235)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:187)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:147)
       at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:225)
       at no.evote.service.__StatusService_Remote_DynamicStub.getStatus(no/evote/service/__StatusService_Remote_DynamicStub.java)
       at no.evote.service._StatusService_Wrapper.getStatus(no/evote/service/_StatusService_Wrapper.java)
       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 no.evote.service.cache.ServiceInvocationHandler.invoke(ServiceInvocationHandler.java:34)
       at $Proxy760.getStatus(Unknown Source)
       at no.evote.presentation.StatusServlet.doGet(StatusServlet.java:25)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
       at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at net.balusc.http.multipart.MultipartFilter.doFilter(MultipartFilter.java:78)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
       at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
       at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
       at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
       at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
       at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
       at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
       at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
       at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
       at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
       at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
       at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
       at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
       at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
       at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
       at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
       at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
       at java.lang.Thread.run(Thread.java:662)
Caused by: org.omg.PortableServer.POAPackage.AdapterNonExistent:
IDL:omg.org/PortableServer/POA/AdapterNonExistent:1.0
       at com.sun.corba.ee.impl.oa.poa.POAImpl.find_POA(POAImpl.java:1057)
       at com.sun.corba.ee.impl.oa.poa.POAFactory.find(POAFactory.java:218)
       ... 48 more

----------END server-side stack trace----------  vmcid: OMG  minor
code: 2  completed: No
       at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
       at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
       at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
       at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
       at com.sun.corba.ee.impl.protocol.giopmsgheaders.MessageBase.getSystemException(MessageBase.java:913)
       at com.sun.corba.ee.impl.protocol.giopmsgheaders.ReplyMessage_1_2.getSystemException(ReplyMessage_1_2.java:129)
       at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.getSystemExceptionReply(CorbaMessageMediatorImpl.java:681)
       at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(CorbaClientRequestDispatcherImpl.java:510)
       at com.sun.corba.ee.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:153)
       at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:235)
       at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:187)
       ... 42 more
|#]
4

3 回答 3

2

唯一的解决方案是不使用 @EJB 注入作为 servlet 中的一个字段（它在类加载时被注入，因此应用程序启动或第一次使用 servlet，而是为每个请求请求一个新实例。可悲的是，那确实意味着您不能使用 @EJB 注入注释，并且必须使用 JNDI 查找等以旧方式处理 EJB。

于 2011-01-13T09:07:20.350 回答
1

来自Glassfish 论坛上的讨论：

仅当 EJB 容器创建注入的新实例时，才会更新注入的引用。因此，如果您一直查找它，您会得到一个具有更新引用的实例，但如果您的代码保留原始实例，或者如果它被池化，则注入的引用仍然是陈旧的。

所以根本问题是对 EJB 的引用是陈旧的。我找到了两个解决这个问题的方法：

  1. 在每个请求上查找 EJB（不要使用 CDI）
  2. 将 EJB 包装在一个代理中，如果引用过时，该代理会查找 EJB

使用第二种解决方案，仍然可以使用 CDI。你需要一个producer和一个InvocationHandler. 下面的代码是我在我的项目中使用的代码的简化版本，它可能无法正确编译，但它会显示用于使这项工作的想法和概念。YMMV。

首先，在使用 EJB 的代码中，您使用@Inject，如下所示：

public class Foo {
    @Inject
    MyEjb obj;
}

其次，您需要一个简单地返回 EJB 的包装版本的生产者：

public class MyEjbProducer {
    @EJB(name = "MyEjb")
    private MyEjb obj;

    @Produces
    public MyEjb getEjb(final InjectionPoint ip) {
        InvocationHandler handler = new MyInvocationHandler(obj, MyEjb.class);
        return (MyEjb)Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), handler);
    }
}

第三，调用处理程序需要再次测试NoSuchEjbException和查找 bean：

public class MyInvocationHandler implements InvocationHandler {
    private MyEjb obj;
    private Class lookupClass;

    public MyInvocationHandler(MyEjb obj, Class lookupClass) {
        this.obj = obj;
        this.lookupClass = lookupClass;
    }

    public Object invoke (...) {
        try {
            return method.invoke(impl, args);
        } catch (final InvocationTargetException e) {
            if (e.getTargetException() instanceof NoSuchEJBException) {
                // 1. look up EJB again
                // 2. try calling invoke again                    
            }
        }
    }
}

这段代码绝不是完整的。一些代码（例如查找 EJB 和再次调用该方法）已被省略。

这样做会奏效。另一种方法是做类似的事情，但是向 EJB 添加一个单独的方法来检查陈旧性，而不是使用用户尝试调用的方法。

你怎么看？有更好的解决方案吗？

于 2011-01-13T08:24:31.183 回答
1

此处已更正：

https://wikis.oracle.com/display/GlassFish/GlassFishv3.1EJB

保留独特的应用程序。id / ejb 跨 ids 重新部署 MS5 Mahesh EJB-6-1 Done by MS3

因此，Glassfish 3.1 应该可以正常工作。

于 2014-03-13T09:47:11.093 回答