在运行客户端类的EJB项目中发生CommunicationException:无法获得与任何这些URL的连接:localhost:1099
我在EJB 3.0中用Jboss 5创建了一个helloworld应用程序。当我尝试运行我的客户端类EjbClientApplication时,它抛出异常。在运行客户端类的EJB项目中发生CommunicationException:无法获得与任何这些URL的连接:localhost:1099
我经常得到下面的异常。我已经做了很多工作,但是我无法找到它,因为我是EJB新手请帮助。
例外:
javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]]] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1763) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:693) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.hex.client.EjbClientApplication.main(EjbClientApplication.java:28) Caused by: javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:335) at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1734) ... 4 more Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:305) ... 5 more Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:97) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:82) at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:301) ... 5 more
JBoss服务器是了端口127.0.0.1:10001但我试图打这个网址127.0.0.1:1099是这个RYT?
服务器属性:
- 地址:127.0.0.1
- 端口:8080
- JNDI端口:1099
mycode的:这些代码包括在一个单一的EJB项目
RemoteInterfaceClass:
package com.hex.statelessbean;
import javax.ejb.Remote;
@Remote
public interface StatelessSessionBeanRemote {
public String displayMessage();
}
StatelessBean:
/**
* Session Bean implementation class StatelessSessionBean
*/
package com.hex.statelessbean;
import javax.ejb.Stateless;
@Stateless
public class StatelessSessionBean implements StatelessSessionBeanRemote {
/**
* Default constructor.
*/
public StatelessSessionBean() {
// TODO Auto-generated constructor stub
}
@Override
public String displayMessage() {
// TODO Auto-generated method stub
return "Hello world";
}
}
客户:
package com.hex.client;
import java.util.Properties;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import com.hex.statelessbean.StatelessSessionBeanRemote;
public class EjbClientApplication {
public static void main(String[] args) {
try {
Properties props = new Properties();
props.setProperty("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.factory.url.pkgs",
"org.jboss.naming");
props.setProperty("java.naming.provider.url", "localhost:1099");
InitialContext ctx = new InitialContext(props);
StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx
.lookup("StatelessSessionBean/remote");
System.out.println("Message from Bean :" + bean.displayMessage());
} catch (NamingException e) {
e.printStackTrace();
}
}
}
更改localhost:1099 to jnp://localhost:1099
和org.jboss.naming to org.jboss.naming:org.jnp.interfaces
并检查ejb的名称。使用注释@RemoteBinding
可以给出ejb的名称。你有端口偏移吗?
Corrected Code:
**Interface class:**
package com.hex.statelessbean;
import javax.ejb.Remote;
@Remote
public interface StatelessSessionBeanRemote {
public String displayMessage();
}
**Stateless Bean class:**
package com.hex.statelessbean;
import javax.ejb.Stateless;
/**
* Session Bean implementation class StatelessSessionBean
*/
@Stateless
public class StatelessSessionBean implements StatelessSessionBeanRemote {
/**
* Default constructor.
*/
public StatelessSessionBean() {
// TODO Auto-generated constructor stub
System.out.println("************* Calling from Default constructor ******************");
}
@Override
public String displayMessage() {
// TODO Auto-generated method stub
System.out.println("************* Calling from displayMessage() ******************");
return "Hello world";
}
}
**Client class:**
package com.hex.client;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import com.hex.statelessbean.StatelessSessionBeanRemote;
public class EjbClientApplication {
/**
* @param args
* @throws NamingException
*/
public static void main(String[] args) {
try {
Properties properties = new Properties();
properties.setProperty("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
properties.setProperty("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
properties.setProperty("java.naming.provider.url",
"jnp://localhost:1099");
InitialContext ctx = new InitialContext(properties);
StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx
.lookup("StatelessSessionBean/remote");
System.out.println("Message from Bean :" + bean.displayMessage());
} catch (NamingException e) {
e.printStackTrace();
}
}
}
**LookUp:**
Message from Bean :Hello world
我已经做了更改,但即使我得到相同的异常。 –
@JayanthiM你的服务器配置中的JNDI端口是什么?您是否在服务器日志或JMX控制台中看到了您的EJB?您可以尝试将java.naming.factory.url.pkgs值更改为org.jboss.naming.client吗? – awagenhoffer
在服务器配置中,JNDI端口是1099,端口是8080,并且我已将值更改为org.jboss.naming:org.jnp.interfaces,但我经常收到此异常。 javax.naming.CommunicationException:无法获得连接到任何这些URL:localhost:1099和发现失败,错误:javax.naming.CommunicationException:接收超时[根异常是java.net.SocketTimeoutException:接收超时] –