[jboss-jira] [JBoss JIRA] Created: (JBREM-901) can't start NetworkRegistry if hostname is not resolvable

[John Mazzitelli (JIRA)]

can't start NetworkRegistry if hostname is not resolvable
---------------------------------------------------------

                 Key: JBREM-901
                 URL: http://jira.jboss.com/jira/browse/JBREM-901
             Project: JBoss Remoting
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 2.2.1.GA
            Reporter: John Mazzitelli
            Priority: Minor


Suppose I have a box whose hostname is not resolvable via DNS (I know, I know, but for people demo'ing software on a laptop, we've seen it happen). So, I cannot "ping `hostname`" but I can "ping 127.0.0.1".

Look at NetworkRegistry:

   public ObjectName preRegister(MBeanServer mBeanServer, ObjectName objectName) throws Exception
   {
      this.mBeanServer = mBeanServer;
      this.objectName = objectName;
      // make sure our identity system property is properly set
      Identity identity = Identity.get(this.mBeanServer);
   ...

Now look at the Identity.get() method it called there:

      if(identities.containsKey(server))
      {
         return (Identity) identities.get(server);
      }
      try
      {
         String serverid = (String) server.getAttribute(new ObjectName("JMImplementation:type=MBeanServerDelegate"), "MBeanServerId");
         Identity identity = new Identity(InetAddress.getLocalHost(), createId(server), serverid);
         identities.put(server, identity);
         return identity;
      }	

It calls InetAddress.getLocalHost() but if that fails (and it will if the local hostname is not resolvable) you can *never* start a NetworkRegistry object.

If there is an exception here in that call to InetAddress.getLocalHost(), it should fallback and use: InetAddress getByName("127.0.0.1").

I tried setting "jboss.identity" sysprop to Identity.createUniqueID() but unfortunately, that sysprop isn't used in this class and NetworkRegistry never looks to see if that is set as a fallback.

I understand that without a resolvable host, it hobbles things - but for demo purposes of software that will ONLY ever run on a single laptop over the loopback network adapter on 127.0.0.1, this should still work without me having to disable things like the NetworkRegistry.

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