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From Tamar Fraenkel <ta...@tok-media.com>
Subject Re: unable to nodetool to remote EC2
Date Mon, 21 May 2012 08:55:33 GMT
Hi!
I am trying the tunnel and it fails. Will be gratefull for some hints:

I defined

   - proxy_host = ubuntu@my_ec2_cassandra_node_public_ip
   - proxy_port = 22

I do:
*ssh -N -f -i /c/Users/tamar/.ssh/Amazon/tokey.openssh -D22
ubuntu@my_ec2_cassandra_node_public_ip*

I put some debug prints and I can see that the ssh_pid is indeed the
correct one.

I run
*jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=22
service:jmx:rmi:///jndi/rmi://my_ec2_cassandra_node_public_ip:7199/jmxrmi*

I get errors and it fails:
channel 2: open failed: connect failed: Connection timed out

One note though, I can ssh to that vm using
ssh -i /c/Users/tamar/.ssh/Amazon/tokey.openssh -D22
ubuntu@my_ec2_cassandra_node_public_ip
without being prompted for PW.

Any help appreciated

*Tamar Fraenkel *
Senior Software Engineer, TOK Media

[image: Inline image 1]

tamar@tok-media.com
Tel:   +972 2 6409736
Mob:  +972 54 8356490
Fax:   +972 2 5612956





On Fri, May 18, 2012 at 9:49 PM, ramesh <dbgroup444@gmail.com> wrote:

>  On 05/18/2012 01:35 PM, Tyler Hobbs wrote:
>
> Your firewall rules need to allow TCP traffic on any port >= 1024 for JMX
> to work.  It initially connects on port 7199, but then the client is asked
> to reconnect on a randomly chosen port.
>
> You can open the firewall, SSH to the node first, or set up something like
> this: http://simplygenius.com/2010/08/jconsole-via-socks-ssh-tunnel.html
>
> On Fri, May 18, 2012 at 1:31 PM, ramesh <dbgroup444@gmail.com> wrote:
>
>  I updated the cassandra-env.sh
> $JMX_HOST="10.20.30.40"
> JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=$JMX_HOST"
>
> netstat -ltn shows port 7199 is listening.
>
> I tried both public and private IP for connecting but neither helps.
>
> However, I am able to connect locally from within server.
>
>  I get this error when I remote:
>
> Error connection to remote JMX agent! java.rmi.ConnectException:
> Connection refused to host: 10.20.30.40; nested exception is:
> java.net.ConnectException: Connection timed out at
> sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601) at
> sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198) at
> sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184) at
> sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110) at
> javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source) at
> javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2329)
> at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:279)
> at
> javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
> at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:144) at
> org.apache.cassandra.tools.NodeProbe. (NodeProbe.java:114) at
> org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:623) Caused by:
> java.net.ConnectException: Connection timed out at
> java.net.PlainSocketImpl.socketConnect(Native Method) at
> java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at
> java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at
> java.net.Socket.connect(Socket.java:529) at
> java.net.Socket.connect(Socket.java:478) at java.net.Socket. (Socket.java:375)
> at java.net.Socket. (Socket.java:189) at
> sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
> at
> sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595) ...
> 10 more
>
> Any help appreciated.
> Regards
> Ramesh
>
>
>
>
> --
> Tyler Hobbs
> DataStax <http://datastax.com/>
>
>
> It helped.
> Thanks Tyler for the info and the link to the post.
>
> Regards
> Ramesh
>

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