[jboss-remoting-issues] [JBoss JIRA] Work started: (JBREM-901) can't start NetworkRegistry if hostname is not resolvable

[Ron Sigal (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBREM-901?page=all ]

Work on JBREM-901 started by Ron Sigal.

> 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
>         Assigned To: Ron Sigal
>            Priority: Minor
>             Fix For: 2.4.0.CR1 (Pinto)
>
>
> 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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