3 Replies Latest reply on Jul 13, 2009 6:47 AM by jaikiran pai

    Getting EJB from remote Jboss instance fails

    henk de boer Master

      Hi,

      I'm trying to get an EJB from a remote Jboss AS 5.0.1 instance. On that same machine (in a different JVM) I can get this bean without any problems using basic code such as this:


      public static void main(String[] args) throws Exception {
       Context context = getRemoteInitialContext();
       Object obj = context.lookup("EJBTest/SessionBean/remote");
      }
      
      public static Context getRemoteInitialContext() throws NamingException {
       Properties p = new Properties();
       p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
       p.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
       p.put(Context.PROVIDER_URL, "jnp://localhost:1099");
       return new InitialContext(p);
      }
      


      This is all straight from the many examples and tutorials and works like a charm.

      However, when I try to connect from the machine next to me, using the same code (but changing localhost into the IP number), it doesn't work. I started Jboss AS with -b 0.0.0.0:

      /opt/jdk1.6.0_12//bin/java -Djboss.server.log.threshold=WARN -Dprogram.name=run.sh -server -Xms128m -Xmx512m -XX:MaxPermSize=256m -Dorg.jboss.resolver.warning=true -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Djava.net.preferIPv4Stack=true -Djava.endorsed.dirs=/opt/jboss/lib/endorsed -classpath /opt/jboss/bin/run.jar:/opt/jdk1.6.0_12//lib/tools.jar org.jboss.Main -b 0.0.0.0
      


      I also confirmed that port 1099 is reachable from the other machine via telnet and nmap. E.g.:

      telnet 10.0.0.2 1099
      Trying ::1...
      Connected to 10.0.0.2.
      Escape character is '^]'.
      ??srjava.rmi.MarshalledObject|???c?>IhashlocBytest
      


      nmap -sT -p 1099 10.0.0.2
      
      Starting Nmap 4.63a ( http://nmap.org ) at 2009-07-11 10:34 CEST
      Interesting ports on 10.0.0.2:
      PORT STATE SERVICE
      1099/tcp open unknown
      


      So the host is reachable and the port is open. However, when I now execute the following from host 10.0.0.1:

      public static void main(String[] args) throws Exception {
       Context context = getRemoteInitialContext();
       Object obj = context.lookup("EJBTest/SessionBean/remote");
      }
      
      public static Context getRemoteInitialContext() throws NamingException {
       Properties p = new Properties();
       p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
       p.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
       p.put(Context.PROVIDER_URL, "jnp://10.0.0.2:1099");
       return new InitialContext(p);
      }
      


      I get the following exception:

      log4j:WARN No appenders could be found for logger (org.jnp.interfaces.TimedSocketFactory).
      log4j:WARN Please initialize the log4j system properly.
      Exception in thread "main" javax.naming.CommunicationException: Could not obtain connection to any of these urls: 10.0.0.2:1099 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 10.0.0.2:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server 10.0.0.2:1099 [Root exception is java.net.ConnectException: Operation timed out]]]
       at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1727)
       at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:680)
       at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:673)
       at javax.naming.InitialContext.lookup(InitialContext.java:392)
       at client.TestRemoteClientAccess.main(TestRemoteClientAccess.java:23)
      Caused by: javax.naming.CommunicationException: Failed to connect to server 10.0.0.2:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server 10.0.0.2:1099 [Root exception is java.net.ConnectException: Operation timed out]]
       at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:311)
       at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1698)
       ... 4 more
      Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server 10.0.0.2:1099 [Root exception is java.net.ConnectException: Operation timed out]
       at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:281)
       ... 5 more
      Caused by: java.net.ConnectException: Operation timed out
       at java.net.PlainSocketImpl.socketConnect(Native Method)
       at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
       at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
       at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
       at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
       at java.net.Socket.connect(Socket.java:519)
       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:277)
       ... 5 more
      


      After googling around a little, I played with the jnp.localAddress property, but this didn't really helped. Setting it to some bogus address correctly gives a binding error, but when I enter my real local IP I pretty much get the same exception as above.

      I wonder if anyone could help me with this or point me to documentation describing how to do this.

      Many thanks in advance.