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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: what other ports than 7199 need to be open for nodetool to work?
Date Mon, 26 Mar 2012 20:48:30 GMT
I have documented some of the things you can do to make the random
port nature of JMX happy.

http://www.jointhegrid.com/highperfcassandra/?p=140

Other options are setting up mx4j or using jmxterm, or setting up a
sock proxy and tell jconsole to use your proxy.

Also there is the xwindows over vnc over ssh route.

Edward


On Mon, Mar 26, 2012 at 3:54 PM, Yiming Sun <yiming.sun@gmail.com> wrote:
> Thanks Nick -- I didn't know about this ticket.  Good to know.
>
> Yes, nodetool doesn't do anything special - but I still wish I could use
> nodetool to examine other nodes, instead of having to ssh to other nodes
> first and then nodetool each one (i am lazy :-).
>
> -- Y.
>
> On Mon, Mar 26, 2012 at 3:50 PM, Nick Bailey <nick@datastax.com> wrote:
>>
>> You are correct about the second random dynamic port. There is a
>> ticket open to fix that as well as some other jmx issues:
>>
>> https://issues.apache.org/jira/browse/CASSANDRA-2967
>>
>> Regarding nodetool, it doesn't do anything special. Nodetool is often
>> used to connect to 'localhost' which generally does not have any
>> firewall rules at all so it usually works. It is still connecting to a
>> random second port though.
>>
>> On Mon, Mar 26, 2012 at 2:42 PM, Yiming Sun <yiming.sun@gmail.com> wrote:
>> > Hi,
>> >
>> > We opened port 7199 on a cassandra node, but were unable to get a
>> > nodetool
>> > to talk to it remotely unless we turn off the firewall entirely.  So
>> > what
>> > other ports should be opened for this -- online posts all indicate that
>> > JMX
>> > uses a random dynamic port, which would be difficult to create a
>> > firewall
>> > exception unless writing a custom java agent.  So we just wondering if
>> > cassandra nodetool uses a specific port/port range.  Thanks.
>> >
>> > -- Y.
>
>

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