Re: cluster IP question and Jconsole?
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 x -p 8001 ring x 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 x, 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\binnodetool -host x -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.
Re: cluster IP question and Jconsole?
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 x -p 8001 ring x 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 x, 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\binnodetool -host x -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
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.
cluster IP question and Jconsole?
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.
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.
Re: cluster IP question and Jconsole?
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.
