JavaEE 6：javax.naming.NameAlreadyBoundException：使用重新绑定来覆盖

Question

我有一个由两个 EJB 实现的业务接口。

UserManagementService

@Remote
public interface UserManagementService {
    // ...
}

UserManagementServiceJpaImpl

@Stateless(name="userManagementServiceJpaImpl")
public class UserManagementServiceJpaImpl implements UserManagementService {

    @EJB(beanName="userManagementDaoJpaImpl")
    private UserManagementDao userManagementDao;

    // ...
}

UserManagementServiceMockImpl

@Stateless(name="userManagementServiceMockImpl")
public class UserManagementServiceMockImpl implements UserManagementService {   

    @EJB(beanName="userManagementDaoMockImpl")
    private UserManagementDao userManagementDao;

    // ...

}

当我将应用程序部署到 Glassfish 3.1 时，出现以下错误：

java.lang.RuntimeException: Error while binding JNDI name com.transbinary.imdb.service.UserManagementService for EJB : userManagementServiceMockImpl
    at com.sun.ejb.containers.BaseContainer.initializeHome(BaseContainer.java:1550)
    at com.sun.ejb.containers.StatelessSessionContainer.initializeHome(StatelessSessionContainer.java:202)
    at com.sun.ejb.containers.ContainerFactoryImpl.createContainer(ContainerFactoryImpl.java:167)
    at org.glassfish.ejb.startup.EjbApplication.loadContainers(EjbApplication.java:234)
    at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:290)
    at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:101)
    at org.glassfish.internal.data.ModuleInfo.load(ModuleInfo.java:186)
    at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:249)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:460)
    at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
    at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:370)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:360)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1067)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
    at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1247)
    at org.glassfish.deployment.autodeploy.AutoOperation.run(AutoOperation.java:145)
    at org.glassfish.deployment.autodeploy.AutoDeployer.deploy(AutoDeployer.java:577)
    at org.glassfish.deployment.autodeploy.AutoDeployer.deployAll(AutoDeployer.java:463)
    at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:395)
    at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:380)
    at org.glassfish.deployment.autodeploy.AutoDeployService$1.run(AutoDeployService.java:213)
    at java.util.TimerThread.mainLoop(Timer.java:512)
    at java.util.TimerThread.run(Timer.java:462)
Caused by: javax.naming.NameAlreadyBoundException: Use rebind to override
    at com.sun.enterprise.naming.impl.TransientContext.doBindOrRebind(TransientContext.java:333)
    at com.sun.enterprise.naming.impl.TransientContext.bind(TransientContext.java:268)
    at com.sun.enterprise.naming.impl.SerialContextProviderImpl.bind(SerialContextProviderImpl.java:98)
    at com.sun.enterprise.naming.impl.LocalSerialContextProviderImpl.bind(LocalSerialContextProviderImpl.java:99)
    at com.sun.enterprise.naming.impl.SerialContext.bind(SerialContext.java:672)
    at com.sun.enterprise.naming.impl.SerialContext.bind(SerialContext.java:689)
    at javax.naming.InitialContext.bind(InitialContext.java:404)
    at javax.naming.InitialContext.bind(InitialContext.java:404)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.publishObject(GlassfishNamingManagerImpl.java:208)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.publishObject(GlassfishNamingManagerImpl.java:189)
    at com.sun.ejb.containers.BaseContainer$JndiInfo.publish(BaseContainer.java:5608)
    at com.sun.ejb.containers.BaseContainer.initializeHome(BaseContainer.java:1535)
    ... 23 more

有人可以帮我理解为什么会出现此错误吗？怎么解决呢？

Answer 1

默认情况下，会自动应用 GlassFish Server 特定的默认 JNDI 名称以实现向后兼容性。因此，com.transbinary.imdb.service.UserManagementService 是 UserManagementService 接口的两个实现的默认 JNDI 名称。这就是为什么我收到 javax.naming.NameAlreadyBoundException 异常的原因。

但由于 EJB 3.1 规范定义了可移植的 EJB JNDI 名称，因此对 GlassFish Server 特定 JNDI 名称的需求较少。

要禁用 EJB 模块的 GlassFish Server 特定 JNDI 名称，请将 disable-nonportable-jndi-names 元素的值设置为 true。默认值为false。

它解决了问题。

资源：http://wikis.oracle.com/display/GlassFish/Developer+Handoff+to+QA+for+EJB-8+%28Option+to+disable+GlassFish-specific+JNDI%29

Answer 2

GlassFish 重新启动。 （这对我有用。）

Answer 3

我也遇到了同样的异常。
就我而言，我将代码从
@Stateless(mappedName = "whatever")
更改为
@Stateless(name = "whatever")
它解决了我的问题

Answer 4

使用重新绑定而不是绑定，它应该可以工作

Answer 5

就我而言，我使用的是 JBoss5.1GA，并且我有两个 EJB 实现了一个通用的本地业务接口...

我遵循@Christo Smal 建议的想法，它对我有用...另一个观察：我正在部署一个Ear，其中包含两个不同 EJB jar 中的两个 EJB；例如：

   Ear File:
   * Jar File1: Containing EJB1
   * Jar File2: Containing EJB2
   * lib/dummy.jar: Library containing the Business Local interface