EJB3.0异常总结--- Need to specify class name in environment or system property,

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异常:
 Need to specify class name in environment or system property, or    


as an applet parameter, or in an application resource file:     


java.naming.factory.initial
  原因:
  1.没有写入jndi.properties.
  2.Need to specify class name in environment or system property. 的 
   意思就是找不到你的EJB环境变量. 换句话说就是你的客户在使用lookup   
   的时候. context没有设置对.
  3.Need to specify class name in environment or system property, or 
    as an applet parameter, or in an application resource file:      
    java.naming.factory.initial
     使用的是代码InitialContext     
     ctx=new InitialContext(props);的方式,不存在jndi配置文件不对的问 
    题,最后想起之前一个教程里的一句命名空间的话,于是登录jboss控制  
    台,找到部署的ejb,前面一个java提醒鸟我,将代码里lookup中参数前  
    面加上java:,搞定。
  
 public class EjbClient {  
    public static void main(String[] args) {  
        Properties props=new Properties();  
        props.setProperty


("java.naming.factroy.initial","org.jnp.interfaces.NamingContextFact


ory");  
        props.setProperty


("java.naming.provider.url","localhost:1099");//或者


jnp://localhost...也可  
        props.setProperty("java.naming.factory.url.pkgs", 


"org.jboss.naming:org.jnp.interfaces");//此行必须有  
        try{  
            InitialContext ctx=new InitialContext(props);  
            HelloWorld helloworld=(HelloWorld)ctx.lookup


("java:HelloWorldBean/remote");//前面的java是关键  
            System.out.println(helloworld.sayHello("jack"));  
        }catch(NamingException e){  
            System.out.println("error:"+e.getMessage());  
        }  
    }  
}  

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Unable to bind Business Interface to the JNDI name: LkmNcEjbsLkmOrdersEjb_jarOrderEjb_Home, throw exception javax.naming.NameAlreadyBoundException: [EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name.; remaining name 'OrderRemote#com/lkm/ejb/orders/remote'. NestedException Message is :[EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name. [wldeploy] [wldeploy] [wldeploy] [wldeploy] at weblogic.deploy.api.tools.deployer.Jsr88Operation.report(Jsr88Operation.java:610) [wldeploy] at weblogic.deploy.api.tools.deployer.Deployer.perform(Deployer.java:140) [wldeploy] at weblogic.deploy.api.tools.deployer.Deployer.runBody(Deployer.java:88) [wldeploy] at weblogic.utils.compiler.Tool.run(Tool.java:159) [wldeploy] at weblogic.utils.compiler.Tool.run(Tool.java:116) [wldeploy] at weblogic.Deployer.run(Deployer.java:74) [wldeploy] at weblogic.Deployer.mainWithExceptions(Deployer.java:63) [wldeploy] at weblogic.ant.taskdefs.management.DeployerWrapper.main(DeployerWrapper.java:14) [wldeploy] Exception in thread "main" weblogic.Deployer$DeployerException: weblogic.deploy.api.tools.deployer.DeployerException: Task 121 failed: [Deployer:149026]deploy application LkmNcEjbs on MS1. [wldeploy] Target state: redeploy failed on Server MS1 [wldeploy] Unable to bind Business Interface to the JNDI name: LkmNcEjbsLkmOrdersEjb_jarOrderEjb_Home, throw exception javax.naming.NameAlreadyBoundException: [EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name.; remaining name 'OrderRemote#com/lkm/ejb/orders/remote'. NestedException Message is :[EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name. [wldeploy] [wldeploy] Task 121 failed: [Deployer:149026]deploy application LkmNcEjbs on MS1. [wldeploy] Target state: redeploy failed on Server MS1 [wldeploy] [wldeploy] [wldeploy] at weblogic.Deployer.run(Deployer.java:76) [wldeploy] at weblogic.Deployer.mainWithExceptions(Deployer.java:63)Unable to bind Business Interface to the JNDI name: LkmNcEjbsLkmOrdersEjb_jarOrderEjb_Home, throw exception javax.naming.NameAlreadyBoundException: [EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name.; remaining name 'OrderRemote#com/lkm/ejb/orders/remote'. NestedException Message is :[EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name. [wldeploy] [wldeploy] [wldeploy] [wldeploy] at weblogic.ant.taskdefs.management.DeployerWrapper.main(DeployerWrapper.java:14) [wldeploy] Caused by: weblogic.deploy.api.tools.deployer.DeployerException: Task 121 failed: [Deployer:149026]deploy application LkmNcEjbs on MS1. [wldeploy] Target state: redeploy failed on Server MS1 [wldeploy] Unable to bind Business Interface to the JNDI name: LkmNcEjbsLkmOrdersEjb_jarOrderEjb_Home, throw exception javax.naming.NameAlreadyBoundException: [EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name.; remaining name 'OrderRemote#com/lkm/ejb/orders/remote'. NestedException Message is :[EJB:011224]Unable to bind the interface com.lkm.ejb.orders.remote.OrderRemote to OrderRemote. Another EJB has already bound an interface to that name. [wldeploy] [wldeploy] [wldeploy] [wldeploy] at weblogic.deploy.api.tools.deployer.Jsr88Operation.report(Jsr88Operation.java:610) [wldeploy] at weblogic.deploy.api.tools.deployer.Deployer.perform(Deployer.java:140) [wldeploy] at weblogic.deploy.api.tools.deployer.Deployer.runBody(Deployer.java:88) [wldeploy] at weblogic.utils.compiler.Tool.run(Tool.java:159) [wldeploy] at weblogic.utils.compiler.Tool.run(Tool.java:116) [wldeploy] at weblogic.Deployer.run(Deployer.java:74) [wldeploy] ... 2 more BUILD FAILED /data/upload/domain01/domain01-ncejb.xml:28: webLogic.Deployer execution failed
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