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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-1489) discoveryUri in transportConnector and uri in networkConnector partially ignored if multicast
Date Mon, 08 Sep 2008 11:31:54 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-1489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Tully resolved AMQ-1489.
-----------------------------

    Resolution: Fixed

a bunch of unit tests made use of the group being taken from the unused host portion of the
url. changing them to default?group="" resolved the failures. FWIR the group was added to
help test isolation on the same subnet.

> discoveryUri in transportConnector and uri in networkConnector partially ignored if multicast
> ---------------------------------------------------------------------------------------------
>
>                 Key: AMQ-1489
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1489
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Connector
>    Affects Versions: 4.1.1, 5.0.0
>            Reporter: Gerald Loeffler
>            Assignee: Gary Tully
>             Fix For: 5.2.0
>
>         Attachments: patchfile.txt
>
>
> This bug relates to the MulticastDiscoveryAgent and was discovered when 
> 1. the discoveryUri of a transportConnector is a multicast-uri such as
> {code:xml}
> <transportConnector uri="..." discoveryUri="multicast://239.3.7.0:37000" />
> {code}
> or
> 2. the uri of a networkConnector is a multicast-uri such as
> {code:xml}
> <networkConnector name="..." uri="multicast://239.3.7.0:37000">
> {code}
> In these cases, the uri is partially ignored by the MulticastDiscoveryAgent: the host-name
of the uri (239.3.7.0) is extracted and used as the group name by the MulticastDiscoveryAgent.
But the actual multicast group IP is always 239.255.2.3 and the multicast port is always 6155,
regardless of what the actual uri is in the configuration.
> The reason for this is that MulticastDiscoveryAgentFactory creates a new MulticastDiscoveryAgent
and sets the group based on the uri's host, but fails to set the discoveryURI itself. MulticastDiscoveryAgentFactory
should be corrected to do this:
> {code:java}
> MulticastDiscoveryAgent rc = new MulticastDiscoveryAgent();
> rc.setDiscoveryURI(uri); // missing
> rc.setGroup(uri.getHost());
> {code}
> Without the above setting of the discoveryURI the MulticastDiscoveryAgent always uses
the DEFAULT_DISCOVERY_URI_STRING which is "multicast://239.255.2.3:6155", explaining the erroneous
behaviour described above.
>   kind regards,
>   gerald
> http://www.gerald-loeffler.net

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