You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by tinhuty he <ti...@hotmail.com> on 2011/04/15 21:46:30 UTC
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?
Posted by Tyler Hobbs <ty...@datastax.com>.
See the first entry in http://wiki.apache.org/cassandra/JmxGotchas
On Wed, Apr 20, 2011 at 9:54 AM, tinhuty he <ti...@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: <us...@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 <ti...@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 <ti...@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?
Posted by tinhuty he <ti...@hotmail.com>.
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: <us...@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 <ti...@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 <ti...@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?
Posted by Watanabe Maki <wa...@gmail.com>.
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 <ti...@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 <ti...@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?
Posted by tinhuty he <ti...@hotmail.com>.
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 <ti...@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?
Posted by Maki Watanabe <wa...@gmail.com>.
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 <ti...@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.