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Subject: Observations from Master Slave setup
Date: Thu, 21 May 2009 05:02:56 -0400
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Thread-Topic: Observations from Master Slave setup
Thread-Index: AcnYb+EPq9toZ8xtReWoxD0k1zK3rQBgs/cg
From: "Nawaz Ahmed" <naahmed@progress.com>
To: <users@activemq.apache.org>
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Hi ,

=20

I was trying to configure a pure master slave configuration with Fuse
Message broker 5.3.0.1 . First I tried without security. I created two
brokers in different machines. The transport connectors looked like
this:

=20

 <transportConnector name=3D"openwire" uri=3D"tcp://machine_name:61720"
discoveryUri=3D"multicast://default" />

=20

This configuration worked fine.

=20

After this I tried with security.

=20

I gave master brokers transport connector as <transportConnector
name=3D"openwire" uri=3D"tcp://machine_name:61720"
discoveryUri=3D"multicast://default" />.

Then I configured a simple authentication plugin as follows.

=20

<plugins>

  <simpleAuthenticationPlugin>

                <users>

                                <authenticationUser username=3D"system"
password=3D"manager"

                                                =
groups=3D"users,admins"/>

                                <authenticationUser username=3D"user"
password=3D"password"

                                                groups=3D"users"/>

                                <authenticationUser username=3D"guest"
password=3D"password" groups=3D"guests"/>

                </users>

 </simpleAuthenticationPlugin>

</plugins>

=20

After doing this the master broker didn't start. I threw security
exception that passwords don't match. But when I changed the transport
connector to <transportConnector name=3D"openwire"
uri=3D"tcp://localhost:61720"  discoveryUri=3D"multicast://default" /> =
it
started fine.=20

=20

After this the slave broker in another machine could not connect to the
master. It threw connection refused exception. But when I configured the
slave in the same machine as master with different port numbers for
transport connectors  it successfully attached itself with the master.

=20

Finally I removed the discoveryUri=3D"multicast://default" from the
transport connectors. Then everything worked fine. The master slave got
working in two different machines with machine names in their transport
connectors URI.

=20

>From the following observations I have a few questions:

=20

1.       Why the broker throws a security exception of User name or
password is invalid if I use the following transport connector.

               <transportConnector name=3D"openwire"
uri=3D"tcp://machine_name:61720"  discoveryUri=3D"multicast://default" =
/>.

2.       Why the exception vanishes if I use localhost  instead of
machine name.

3.       Even if the master starts with localhost the slave in other
machine gets connection refused exception.

4.       When I remove the discovery URI from the transport connectors
everything works fine.

=20

Any suggestions on this will be appreciated.

=20

Regards,

Nawaz Ahmed

=20


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