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From "Timothy Bish (JIRA)" <>
Subject [jira] [Closed] (AMQ-2650) Multicast discovery seems to stop to work.
Date Mon, 09 Jul 2012 19:35:33 GMT


Timothy Bish closed AMQ-2650.

    Resolution: Incomplete

No test provided to try to reproduce this issue, recommend upgrades to the latest release
to capture all the current fixes.
> Multicast discovery seems to stop to work.
> ------------------------------------------
>                 Key: AMQ-2650
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.2.0
>         Environment: ActiveMQ 5.2. Linux Redhat 64bits. Java 1.6 - multi network interfaces
>            Reporter: Eric
>             Fix For: 5.x
>         Attachments: Bug Multicast.doc
> We are on a production system for an ERDF major project.
> We have about 15 servers called tpnocp"XY"v  [ "XY" = 01,02,03,04,.. ]. On these servers,
some Java processes are launched. Some of them have ActiveMQ embedded brokers. Generally speaking,
these brokers are linked together by about 4 different networks of brokers with duplex or
not duplex network connectors. Multicast discovery mechanism is used to dynamically create
brokers connections. Default Multicast IP is used with different groups.
> I'm currently in a situation where
> - a java process is launched on tpnoc09v server, and has an  embedded broker named "BEA-tpnocp09v"
> - this embedded broker dynamically discovered 4 brokers that are embedded in 4 java process
that are launched on the tpnocp13v server (tpnocp13v-bus IP address is used), and connected
in full duplex to them.
> - a fifth process is executed on the same tpnocp13v server, has an embedded broker which
has the same ActiveMQ configuration as the 4 others that are connected to the "BEA-tpnocp09v"
> - the "BEA-tpnocp09v" embedded broker is not connected to the fifth embedded broker.
> - Multicast packets relative to this fifth broker, seem to be correctly received by tpnocp09v
server (tcpdump)
> - All seems stable.

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