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From "kondo@vivinavi.com" <ko...@vivinavi.com>
Subject Re: Error connection to remote JMX agent! on nodetool
Date Wed, 23 Mar 2011 16:58:04 GMT
Hi maki-san

I am so sorry this was my mistake.
I expected when I set data at one node, the data should be copied to the 
other node
at the same keyspace and same column family by replication.
This replication was working.
I just made a mistake to get data by wrong Key.(First character of key 
was lower-case character
but I thought first character was capitalized. I tried to get by 
key=User but key=user)
I am so sorry for this confusion.
So now I confirmed the data I set at **.**.254.53 was replicated to 
**.**.254.54.
(At first I started 53 with autobootstrap=false then started 54 with 
autobootstrap=true and then
finally restarted 53 with autobootstrap=true. So 53 server is like a master)

However when I set data at 54 server, this data never been replicated.
So this is Not bidirectional replication ?
Cassandra at multi-node is ring (This means no master, no slave?).
(Off course seeds in cassandra.yaml of both server are the same)
So I expected I can replicate bidirectinally.
Am I wrong?
And when I run at multi-node, I can't create keyspace, column family on 
Cassandra-cli at other 54 server
(like a slave server).
Is this normal?
How can I create same keyspace and column family at multi-node?
or I have to restart at single-node, then can I create same keyspace and 
column family?

Thank you for your help in advance.

Mamoru Mac Kondo

(2011/03/22 18:43), Maki Watanabe wrote:
> How do you define your Keyspace?
> As you may know, in Cassandra, replication (factor) is defined as the
> attribute of Keyspace.
> And what do you mean:
>> However replication never happened.
>> I can't get data I set at other node.
> What did you do on cassandra, and what did you get in response?
>
> maki
>
>
> 2011/3/23 kondo@vivinavi.com<kondo@vivinavi.com>:
>> Hi Sasha
>> Thank you so much for your advice.
>> I changed JMX_PORT from 10036 to 8080 in cassandra-env.sh.
>> Now nodetool ring is working as following.
>>
>> # nodetool --host **.**.254.54 ring
>> Address         Status   State     Load            Owns        Token
>>
>>            31247585259092561925693111230676487333
>> **.**.254.53    Up     Normal  51.3 KB         84.50%
>> 4871825541058236750403047111542070004
>> **.**.254.54    Up     Normal  66.71 KB       15.50%
>> 31247585259092561925693111230676487333
>>
>> Then it seems I could set data to other node by Cassandra-cli --host other
>> node IP --port 9160.(Currently only 2 nodes)
>> However replication never happened.
>> I can't get data I set at other node.
>> I don't know what's wrong.
>> (I thought replication starts when cassandra -p restart)
>> Please advice me how to do to start replication.
>> Thank you for your advice in advance.
>>
>>
>> (2011/03/18 23:38), Sasha Dolgy wrote:
>>
>> You need to specify the -jmxport with nodetool
>>
>> On Mar 19, 2011 2:48 AM, "kondo@vivinavi.com"<kondo@vivinavi.com>  wrote:
>>> Hi everyone
>>>
>>> I am still new to Cassandra, Thrift.
>>> But anyway Cassandra 0.7.4, Thrift 0.5.0 are working on java 1.6.0.18 of
>>> Debian 5.0.7.at single node.
>>> Then I had to try and check multi node on 2 servers.
>>> (JVM_PORT=10036 on /etc/cassandra-env.sh)
>>> I modified /etc/cassandra/cassandra.yaml as following.
>>> auto_bootstrap:false ->true
>>> seeds: -127.0.0.1 ->  add Global IP addres of 2 servers(incl.own server)
>>> listen_address:localhost ->  Own Global IP address(or own host name on
>>> /etc/hosts)
>>> rpc_address:localhost ->0.0.0.0
>>> I run master server and then slave server.
>>> netstat -nl is as following. on both servers.
>>> Proto Recv-Q Send-Q Local Address Foreign Address State
>>> tcp 0 0 0.0.0.0:9160 0.0.0.0:* LISTEN
>>> tcp 0 0 0.0.0.0:10036 0.0.0.0:* LISTEN
>>> tcp 0 0 **.**.**.**:7000 0.0.0.0:* LISTEN
>>>
>>> However it seems Cassandra doesn't work.
>>> Because I can't get any data from Cluster (always null, data is broken?)
>>> So I checked the nodetool (nodetool --host IP ring).
>>> The nodetool had errors as following.
>>> Error connection to remote JMX agent!
>>> java.io.IOException: Failed to retrieve RMIServer stub:
>>> javax.naming.ServiceUnavailableException [Root exception is
>>> java.rmi.ConnectException: Connection refused to host: **.**.**.**;
>>> nested exception is:
>>> java.net.ConnectException: Connection refused]
>>> at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:342)
>>> at
>>>
>>> javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
>>> 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: javax.naming.ServiceUnavailableException [Root exception is
>>> java.rmi.ConnectException: Connection refused to host: **.**.**.**;
>>> nested exception is:
>>> java.net.ConnectException: Connection refused]
>>> at
>>> com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:118)
>>> at
>>>
>>> com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:203)
>>> at javax.naming.InitialContext.lookup(InitialContext.java:409)
>>> at
>>>
>>> javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1902)
>>> at
>>>
>>> javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1871)
>>> at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:276)
>>> ... 4 more
>>> Caused by: java.rmi.ConnectException: Connection refused to host:
>>> **.**.**.**; nested exception is:
>>> java.net.ConnectException: Connection refused
>>> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
>>> at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
>>> at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
>>> at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
>>> at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
>>> at
>>> com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:114)
>>> ... 9 more
>>> Caused by: java.net.ConnectException: Connection refused
>>> at java.net.PlainSocketImpl.socketConnect(Native Method)
>>> at
>>>
>>> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310)
>>> at
>>>
>>> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176)
>>> at
>>> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163)
>>> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
>>> at java.net.Socket.connect(Socket.java:546)
>>> at java.net.Socket.connect(Socket.java:495)
>>> at java.net.Socket.<init>(Socket.java:392)
>>> at java.net.Socket.<init>(Socket.java:206)
>>> at
>>>
>>> sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
>>> at
>>>
>>> sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
>>> at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
>>> ... 14 more
>>>
>>> I don't know how to do.
>>> Please advise what am I wrong.
>>> And please let me know how to delete or re-build cluster.
>>> Because I can't even set data or make new column family currently on
>>> Cassandra-Cli.
>>> Thank you for your help in advance.
>>>
>>> --
>>>
>> **


-- 
*************************
Mamoru Kondo
Vivid Navigation,Inc.
http://www.vivinavi.com
kondo@vivinavi.com
Office:310-326-2900
Fax:310-257-0051
*************************


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