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

    Getting EJB from remote Jboss instance fails

    henk53
    henk53 Jul 11, 2009 7:44 AM

      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.





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