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From Yang <teddyyyy...@gmail.com>
Subject Re: JMX(RMI) dynamic port allocation problem still exists?
Date Tue, 28 Aug 2012 14:55:00 GMT
Thanks Nick.

it would be nice to pack such work-arounds together with Cassandra, and
enable it with a command line arg in the start up script,  so that the
end-user has a more
smooth usage experience ----- we did spend some time before to debug the
ports issues, and find a trick for that.
I imagine a lot of users will have to go through the same process since
"closing all ports" is the default EC2 network security policy for most
companies. Or at least add a link for the fix in the installation wikis
such as http://www.datastax.com/docs/1.1/install/install_ami<https://webmail.iac.com/owa/redir.aspx?C=PLVE6taKpU--Dxw69WVEOtdUcArCWM8IUH6LBjdXcM7STlqwkARq8mA8Nva_mtGaSKmmva4pWxE.&URL=http%3a%2f%2fwww.datastax.com%2fdocs%2f1.1%2finstall%2finstall_ami>



Yang

On Mon, Aug 27, 2012 at 9:03 PM, Nick Bailey <nick@datastax.com> wrote:

> The problem still exists. There was a discussion about resolving
> inside cassandra here:
>
> https://issues.apache.org/jira/browse/CASSANDRA-2967
>
> But the ultimate resolution was that since workarounds like the one
> you mentioned exist it would be left as is for now.
>
> On Mon, Aug 27, 2012 at 6:07 PM, Yang <teddyyyy123@gmail.com> wrote:
> > no, the priblem is that jmx listens on 7199, once an incoming connection
> is
> > made, it literally tells the other side "come and connect to me on these
> 2
> > rmi ports",  and open up  2 random  Rmi ports
> >
> > we used to use the trick in the above link to resolve this
> >
> > On Aug 27, 2012 3:04 PM, "Hiller, Dean" <Dean.Hiller@nrel.gov> wrote:
> >>
> >> In cassandra-env.sh, search on JMX_PORT and it is set to 7199 (ie.
> Fixed)
> >> so that solves your issue, correct?
> >>
> >> Dean
> >>
> >> From: Yang <teddyyyy123@gmail.com<mailto:teddyyyy123@gmail.com>>
> >> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>"
> >> <user@cassandra.apache.org<mailto:user@cassandra.apache.org>>
> >> Date: Monday, August 27, 2012 3:44 PM
> >> To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>"
> >> <user@cassandra.apache.org<mailto:user@cassandra.apache.org>>
> >> Subject: JMX(RMI) dynamic port allocation problem still exists?
> >>
> >> ow, does Cassandra come with an out-of-the box solution to fix the above
> >> problem? or do I have
> >> to create that little javaagent jar myself?
>

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