java - EJB 容器初始化错误 : Error while binding JNDI name?

Question

花了一整天的时间试图让它工作，但没有成功。任何想法如何解决这个错误？

以下是关联的三个项目及其结构:

BasicSessionEJB.java

package ejbModule.test;

import javax.ejb.Stateless;

/**
 * Session Bean implementation class BasicSessionEJB
 */
@Stateless( mappedName="ejb/BasicSessionEJB" )
public class BasicSessionEJB implements BasicSessionEJBRemote {

    /**
     * Default constructor. 
     */
    public BasicSessionEJB() {
        // TODO Auto-generated constructor stub
    }
    public String getMessage() {
        return "Hello, EJB Wolrd!";
   }

}

BasicServlet.java

package src;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ejb.*;
/**
 * Servlet implementation class BasicServlet
 */


public class BasicServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    @EJB private ejbModule.test.BasicSessionEJBRemote basicSessionEJB;

    /**
     * Default constructor. 
     */
    public BasicServlet() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        try{
            PrintWriter out = response.getWriter();
            out.println("Servlet Message:" + basicSessionEJB.getMessage());
        } catch(Exception e){
             throw new ServletException (e);
        }
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        try{
            PrintWriter out = response.getWriter();
            out.println("Message:" + basicSessionEJB.getMessage());
        } catch (Exception e){
             throw new ServletException (e);
        }
    }



}

BasicSessionEJBRemote.java

package ejbModule.test;

import javax.ejb.Remote;

@Remote
public interface BasicSessionEJBRemote {
    String getMessage();
}

EJBDesktopClient.java

package appClientModule.test;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class EJBDesktopClient {

    public EJBDesktopClient() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
       try {
           Context ctx = new InitialContext();
           ejbModule.test.BasicSessionEJBRemote bean = (ejbModule.test.BasicSessionEJBRemote) ctx.lookup("ejb/BasicSessionEJB");
           System.out.println("Message: " + bean.getMessage());
       } catch (NamingException e) {
           e.printStackTrace();
       }
    }

}

错误日志

2016-04-24T01:36:18.285+0100|Severe: Exception while loading the app
2016-04-24T01:36:18.287+0100|Severe: The web application [unknown] created a ThreadLocal with key of type [org.glassfish.pfl.dynamic.codegen.impl.CurrentClassLoader$1] (value [org.glassfish.pfl.dynamic.codegen.impl.CurrentClassLoader$1@77b3a7d8]) and a value of type [org.glassfish.web.loader.WebappClassLoader] (value [WebappClassLoader (delegate=true; repositories=WEB-INF/classes/)]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2016-04-24T01:36:18.297+0100|Severe: Exception while loading the app : EJB Container initialization error
java.lang.RuntimeException: Error while binding JNDI name ejb/BasicSessionEJB for EJB BasicSessionEJB
    at com.sun.ejb.containers.BaseContainer.initializeHome(BaseContainer.java:1620)
    at com.sun.ejb.containers.StatelessSessionContainer.initializeHome(StatelessSessionContainer.java:190)
    at com.sun.ejb.containers.StatelessContainerFactory.createContainer(StatelessContainerFactory.java:63)
    at org.glassfish.ejb.startup.EjbApplication.loadContainers(EjbApplication.java:221)
    at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:291)
    at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:99)
    at org.glassfish.internal.data.ModuleInfo.load(ModuleInfo.java:206)
    at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:313)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:496)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
    at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:360)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:360)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
    at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:534)
    at com.sun.enterprise.v3.admin.AdminAdapter.onMissingResource(AdminAdapter.java:224)
    at org.glassfish.grizzly.http.server.StaticHttpHandlerBase.service(StaticHttpHandlerBase.java:189)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.naming.NameAlreadyBoundException: Use rebind to override
    at com.sun.enterprise.naming.impl.TransientContext.doBindOrRebind(TransientContext.java:322)
    at com.sun.enterprise.naming.impl.TransientContext.bind(TransientContext.java:257)
    at com.sun.enterprise.naming.impl.TransientContext.bind(TransientContext.java:266)
    at com.sun.enterprise.naming.impl.SerialContextProviderImpl.bind(SerialContextProviderImpl.java:85)
    at com.sun.enterprise.naming.impl.LocalSerialContextProviderImpl.bind(LocalSerialContextProviderImpl.java:94)
    at com.sun.enterprise.naming.impl.SerialContext.bind(SerialContext.java:640)
    at com.sun.enterprise.naming.impl.SerialContext.bind(SerialContext.java:657)
    at javax.naming.InitialContext.bind(InitialContext.java:429)
    at javax.naming.InitialContext.bind(InitialContext.java:429)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.publishObject(GlassfishNamingManagerImpl.java:212)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.publishObject(GlassfishNamingManagerImpl.java:196)
    at com.sun.ejb.containers.BaseContainer$JndiInfo.publish(BaseContainer.java:4952)
    at com.sun.ejb.containers.BaseContainer.initializeHome(BaseContainer.java:1607)
    ... 46 more

Answer 1

0

我知道这是一个旧话题，但我认为它仍然非常重要。解决方法很简单，在 web 模块的 pom.xml 文件中你需要添加下一个文本

<scope>provided<scope>

这是因为您已经部署了一个 EJB，所以当您尝试使用 servlet 执行此操作时，它会复制它并生成错误