initialContext。远程EJB的lookup在远程服务器重新启动后失败
https://stackoverflow.com/questions/3936739
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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。EJBA通过IIOP连接到EJB B。此设置通常可以工作，但是如果重新启动服务器B，则EJB A将失败，直到服务器A也重新启动为止。
问题是，如果重新启动服务器B，则所有调用initialContext。by ejb a的lookup aby a a java.io.io.io exception：stream ofstream ofstream ofstream ofstream thefect a failite。我无法找到有关我们的应用服务器（Glassfish）是否为initialContext.lookup进行任何类型的缓存信息。还有其他原因如何在服务器重新启动之前查找失败？如果initial context.lookup可以缓存连接，我该如何解决？
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，但是堆栈跟踪表示JNDItemplate正在调用initialContext.lookup（）。
感谢您的任何见解。
PS我应该澄清，我正在尝试弄清楚是否有可能避免每次重新启动服务器B时必须重新启动A。
Jnditemplate的定义（带有“ X和'＃” S的一些文本涂黑）
<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>
和堆栈跟踪（一部分用“ [应用程序方法]''取代）：
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
解决方案
通过堆栈跟踪，我可以得出结论，春季框架本身不会缓存 - 它实际上是在调用 InitialContext.lookup(). 。尽管如此，堆栈跟踪和错误代码意味着存在连接断裂。
WebSphere过去曾经有类似的错误，此后已修复。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中也有类似的错误...
以撒
其他提示
方法Syncchanges（）定期运行以同步目的。主要想法是如果发生错误（在重新启动exsample之后）并重新初始化，则关闭上下文。用方法上下文结束上下文后。close（）您应该将其值无效。
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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