我已经使用 Jboss 6 在 EJB 3.0 中创建了一个 helloworld 应用程序，如下面的链接所示
现在我遇到了异常，我已经做了很多关于它的 rnd 但我找不到它，因为我是 EJB 新手，请帮忙。
log4j:WARN 找不到记录器 (org.jnp.interfaces.TimedSocketFactory) 的附加程序。log4j:WARN 请正确初始化 log4j 系统。log4j:WARN 有关详细信息，请参阅http://logging.apache.org/log4j/1.2/faq.html#noconfig。
* javax.naming.CommunicationException：无法获得与以下任何 url 的连接：localhost:1099 并且发现失败并出现错误：javax.naming.CommunicationException：接收超时 [根异常是 java.net.SocketTimeoutException：接收超时] * 在 org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1690)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1761)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:695)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:688)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.ibytecode.client.EJBApplicationClient.doLookup(EJBApplicationClient.java:22)
at com.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:10)
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.TwoStacksPlainDatagramSocketImpl.receive0(Native Method)
at java.net.TwoStacksPlainDatagramSocketImpl.receive(Unknown Source)
at java.net.DatagramSocket.receive(Unknown Source)
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1659)
... 6 more
[Root exception is javax.naming.CommunicationException: Failed to connect to server
localhost/127.0.0.1:1099 [根异常是 javax.naming.ServiceUnavailableException：
无法连接到服务器 localhost/127.0.0.1:1099 [根异常是
java.net.ConnectException：连接被拒绝：连接]]]
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1780)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:695)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:688)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.ibytecode.client.EJBApplicationClient.doLookup(EJBApplicationClient.java:22)
at com.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:10)
原因：javax.naming.CommunicationException：无法连接到服务器 localhost/127.0.0.1:1099 [根异常是 javax.naming.ServiceUnavailableException：无法连接到服务器 localhost/127.0.0.1:1099 [根异常是 java.net .ConnectException：连接被拒绝：连接]]
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:337)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1746)
... 5 more
原因：javax.naming.ServiceUnavailableException：无法连接到服务器 localhost/127.0.0.1:1099 [根异常是 java.net.ConnectException：连接被拒绝：连接] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java :307) ... 6 更多
引起：java.net.ConnectException：连接被拒绝：连接
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
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:303)
... 6 more
com.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:12) 处的线程“主”java.lang.NullPointerException 中的异常