[jboss-remoting-issues] [JBoss JIRA] Updated: (JBREM-901) can't start NetworkRegistry if hostname is not resolvable
Ron Sigal (JIRA)
jira-events at lists.jboss.org
Fri Mar 7 05:17:57 EST 2008
[ http://jira.jboss.com/jira/browse/JBREM-901?page=all ]
Ron Sigal updated JBREM-901:
----------------------------
Assignee: 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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