See the first entry in http://wiki.apache.org/cassandra/JmxGotchas
On Wed, Apr 20, 2011 at 9:54 AM, tinhuty he <tinh...@hotmail.com> wrote: > Maki, > > Yes you are right, 8081 is mx4j port, the JMX_PORT is 8001 in the > cassandra-env.sh. > > in the cassandra Linux server itself, I can run this successfully: > nodetool -host xxxxx -p 8001 ring > xxxxx is the actually IP address > > however when I run the same command in another windows machine(which has > the cassandra windows version extracted), I am getting exception like below, > one thing puzzled me is that the command trying to connect to ip xxxxx, but > the exception claimed: "Connection refused to host: 127.0.0.1". Is there > anything else that I need to config or...? I guess this is probably the > reason that jconsole can't connect to port 8001 remotely either? Thanks for > any advice! > > D:\apache-cassandra-0.7.4\bin>nodetool -host xxxxx -p 8001 ring > Starting NodeTool > Error connection to remote JMX agent! > java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested > exception is: > java.net.ConnectException: Connection refused: connect > at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source) > at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source) > at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source) > at sun.rmi.server.UnicastRef.invoke(Unknown Source) > at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown > Source) > at javax.management.remote.rmi.RMIConnector.getConnection(Unknown > Source) > at javax.management.remote.rmi.RMIConnector.connect(Unknown Source) > at javax.management.remote.JMXConnectorFactory.connect(Unknown > Source) > at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:137) > at org.apache.cassandra.tools.NodeProbe.<init>(NodeProbe.java:107) > at org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:511) > Caused by: java.net.ConnectException: Connection refused: connect > at java.net.PlainSocketImpl.socketConnect(Native Method) > at java.net.PlainSocketImpl.doConnect(Unknown Source) > at java.net.PlainSocketImpl.connectToAddress(Unknown Source) > at java.net.PlainSocketImpl.connect(Unknown Source) > at java.net.SocksSocketImpl.connect(Unknown Source) > at java.net.Socket.connect(Unknown Source) > at java.net.Socket.connect(Unknown Source) > at java.net.Socket.<init>(Unknown Source) > at java.net.Socket.<init>(Unknown Source) > at > sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown Source) > at > sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown Source) > ... 11 more > > > > -----Original Message----- From: Watanabe Maki > Sent: Saturday, April 16, 2011 1:45 AM > > To: user@cassandra.apache.org > Cc: <user@cassandra.apache.org> > > Subject: Re: cluster IP question and Jconsole? > > 8081 is your mx4j port, isn't it? You need to connect jconsole to JMX_PORT > specified in cassandra-env.sh. > > maki > > From iPhone > > > On 2011/04/16, at 13:56, tinhuty he <tinh...@hotmail.com> wrote: > > Maki, thanks for your reply. for the second question, I wasn't using the >> loopback address, I was using the actually IP address for that server. I am >> able to telnet to that IP on port 8081, but using jconsole failed. >> >> -----Original Message----- From: Maki Watanabe >> Sent: Friday, April 15, 2011 9:43 PM >> To: user@cassandra.apache.org >> Cc: tinhuty he >> Subject: Re: cluster IP question and Jconsole? >> >> 127.0.0.2 to 127.0.0.5 are valid IP addresses. Those are just alias >> addresses for your loopback interface. >> Verify: >> % ifconfig -a >> >> 127.0.0.0/8 is for loopback, so you can't connect this address from >> remote machines. >> You may be able configure SSH port forwarding from your monitroing >> host to cassandra node though I haven't try. >> >> maki >> >> 2011/4/16 tinhuty he <tinh...@hotmail.com>: >> >>> I have followed the description here >>> >>> http://www.edwardcapriolo.com/roller/edwardcapriolo/entry/lauching_5_node_cassandra_clusters >>> to created 5 instances of cassandra in one CentOS 5.5 machine. using >>> nodetool shows the 5 nodes are all running fine. >>> >>> Note the 5 nodes are using IP 127.0.0.1 to 127.0.0.5. I understand >>> 127.0.0.1 >>> is pointing to local server, but how about 127.0.0.2 to 127.0.0.5? looks >>> to >>> me that they are not valid IP? how come all 5 nodes are working ok? >>> >>> Another question. I have installed MX4J in instance 127.0.0.1 on port >>> 8081. >>> I am able to connect to http://server:8081/ from the browser. However >>> how do >>> I connect using Jconsole that was installed in another windows >>> machines?(since my CentOS5.5 doesn't have X installed, only SSH allowed). >>> >>> Thanks. >>> >> >> -- Tyler Hobbs Software Engineer, DataStax <http://datastax.com/> Maintainer of the pycassa <http://github.com/pycassa/pycassa> Cassandra Python client library
