javax.naming.CommunicationException：
我在EJB3.0中创建了一个helloworld应用程序，JBoss6，如下面的链接所示
http://theopentutorials.com/examples/java-ee/ejb3/how-to-create-a-simple-ejb3-project-in-eclipse-jboss-6-1/
现在，我得到了例外，我做了很多关于它，但我找不到它，因为我是新的EJB，请帮助。
Log4j:没有为记录器(org.jnp.interfaces.TimedSocketFactory)找到任何附加程序。log4j :警告请正确初始化log4j系统。Log4j:警告参见http://logging.apache.org/log4j/1.2/faq.html#noconfig以获得更多信息。
*javax.naming.CommunicationException:无法连接到这些urls中的任何一个: localhost:1099，而发现失败时出现了错误: javax.naming.CommunicationException:接收超时根异常是java.net.SocketTimeoutException:接收时间为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 [根异常为javax.naming.ServiceUnavailableException：
未能连接到服务器localhost/127.0.0.1:1099 [根异常为
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)导致: javax.naming.CommunicationException:未能连接到服务器localhost/127.0.0.1:1099 [根异常为javax.naming.ServiceUnavailableException:未能连接到服务器本地主机/127.0.0.1:1099根异常是java.net.ConnectException:连接被拒绝:连接:连接]
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:337)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1746)
... 5 more由: javax.naming.ServiceUnavailableException:未能连接到服务器localhost/127.0.0.1:1099根异常是java.net.ConnectException:连接被拒绝:连接在
由: java.net.ConnectException:连接拒绝:连接引起
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 morecom.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:12)中线程"main“java.lang.NullPointerException中的异常
回答 1
Stack Overflow用户
发布于 2015-05-11 14:43:12
在EJBApplicationClient.java:12有一个空指针
https://stackoverflow.com/questions/14168683
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