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From Stephanie Huynh <>
Subject 3 seats open to Cassandra Developer class in Redwood City, CA.
Date Thu, 24 Apr 2014 16:05:36 GMT
Hey Everyone,

We just had 3 seats open to the Cassandra Developer course in Redwood City
on 4/30/14. If you are interested in attending, please register at the link
below before they sell out:


*From:* Chris Lohfink []
*Sent:* Thursday, April 24, 2014 8:39 AM
*Subject:* Re: nodetool hangs

The way RMI (which JMX uses, which is what nodetool uses) works is it will
first connect, then send a address/port back over the wire for it to make a
new 2nd connection too.  This will be potentially to a different address
then (can override with -Djava.rmi.server.hostname=<public name>
in /etc/cassandra/ and a random port.  Likely the 2nd
connection is whats timing out.  JMX makes firewalls and sysadmins very
frustrated :)


Chris Lohfink

On Apr 24, 2014, at 7:05 AM, Jacob Rhoden <> wrote:

I’ve done an install on an amazon instance, and for some strange reason I
can telnet to the JMX port, but node tool just hangs and doesn’t do
anything. I am hoping I’m overlooking something simple that someone could
help me point out? Thanks (:

cassandra@t1:/cassandra/db$ telnet 7199


Connected to

Escape character is '^]'.


telnet> quit

Connection closed.

cassandra@t1:/cassandra/db$ nodetool -h status

Failed to connect to '': Connection timed out

Any pointers would be appreciated. (cqlsh works fine, its just nodetool
thats giving me the headache)



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