Woraphol, Yes you'd need to tweak some settings in your VMs such that they allow remote connections. Could also be a firewall running inside of your NameNode instance preventing this. Once you get the telnet working after troubleshooting your network settings (I don't know the bullseye spot here, sorry), it should be fine after-on.
2012/1/1 ???? ???????????????? <[email protected]>: > > Dear all, > ? I successfully installed and run Hadoop on a single machine whose ip is > 192.168.1.109 (In fact it is actually an Ubuntu instance running on virtual > box ) . When typing jps it shows2473 DataNode2765 TaskTracker3373 Jps2361 > NameNode2588 SecondaryNameNode2655 JobTracker > ?This should mean that the hadoop is up and running.Running commands like > ./hadoop fs -ls is fine and produces the expected result. > But If I try to connect it from my windows box whose ip is 192.168.1.80 by > writingJava code's HDFS API to connect it as follows: Configuration conf = > new Configuration();FileSystem hdfs = null;Path filenamePath = new > Path(FILE_NAME); > hdfs = FileSystem.get(conf); <-- the problem occurred at this line > when I run the code, the error displayed as follows: > 11/12/07 20:37:24 INFO ipc.Client: Retrying connect to server: > /192.168.1.109:9000. Already tried 0 time(s).11/12/07 20:37:26 INFO > ipc.Client: Retrying connect to server: /192.168.1.109:9000. Already tried 1 > time(s).11/12/07 20:37:28 INFO ipc.Client: Retrying connect to server: > /192.168.1.109:9000. Already tried 2 time(s).11/12/07 20:37:30 INFO > ipc.Client: Retrying connect to server: /192.168.1.109:9000. Already tried 3 > time(s).11/12/07 20:37:32 INFO ipc.Client: Retrying connect to server: > /192.168.1.109:9000. Already tried 4 time(s).11/12/07 20:37:33 INFO > ipc.Client: Retrying connect to server: /192.168.1.109:9000. Already tried 5 > time(s).11/12/07 20:37:35 INFO ipc.Client: Retrying connect to server: > /192.168.1.109:9000. Already tried 6 time(s).11/12/07 20:37:37 INFO > ipc.Client: Retrying connect to server: /192.168.1.109:9000. Already tried 7 > time(s).11/12/07 20:37:39 INFO ipc.Client: Retrying connect to server: > /192.168.1.109:9000. Already tried 8 time(s).11/12/07 20:37:41 > ?INFO ipc.Client: Retrying connect to server: /192.168.1.109:9000. Already > tried 9 time(s).java.net.ConnectException: Call to /192.168.1.109:9000 failed > on ?connection exception: java.net.ConnectException: Connection refused: no > further information ? ? ? ?To make sure if the socket is already opened and > waits for the incoming connections on the hadoop serer, I netstat on the > ubuntu boxthe result shows as follows: > > tcp ? ? ? ?0 ? ? ?0 localhost:51201 ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? > ? ?2765/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50020 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? > ? ? ? ? ? LISTEN ? ? ?2473/java ? ? ? tcp ? ? ? ?0 ? ? ?0 localhost:9000 ? ? > ? ? ?*:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2361/java ? ? ? tcp ? ? ? ?0 ? ? ?0 > localhost:9001 ? ? ? ? ?*:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2655/java ? ? ? > tcp ? ? ? ?0 ? ? ?0 *:mysql ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? > ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50090 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? > ? ? ? ? ? LISTEN ? ? ?2588/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:11211 ? ? ? ? ? ? > ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 > *:40843 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2473/java ? ? ? > tcp ? ? ? ?0 ? ? ?0 *:58699 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? > ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50060 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? > ? ? ? ? ? LISTEN ? ? ?2765/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50030 > ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2655/java ? ? ? tcp ? ? ? > ?0 ? ? ?0 *:53966 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? > ?2655/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:www ? ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? > ? ? ? ? LISTEN ? ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 *:epmd ? ? ? ? ? ? ? > ? ?*:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 > *:55826 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2588/java ? ? ? > tcp ? ? ? ?0 ? ? ?0 *:ftp ? ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? > ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50070 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? > ? ? ? ? ? LISTEN ? ? ?2361/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:52822 ? ? ? ? ? ? > ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2361/java ? ? ? tcp ? ? ? ?0 ? ? ?0 > *:ssh ? ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?- ? ? ? ? ? ? ? > tcp ? ? ? ?0 ? ? ?0 *:55672 ? ? ? ? ? ? ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? > ? ?- ? ? ? ? ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50010 ? ? ? ? ? ? ? ? *:* > ? ? ? ? ?LISTEN ? ? ?2473/java ? ? ? tcp ? ? ? ?0 ? ? ?0 *:50075 ? ? ? ? ? ? > ? ? *:* ? ? ? ? ? ? ? ? ? ? LISTEN ? ? ?2473/java > I noticed that if the local address column is something like localhost:9000 > (starts with localhost: not *:)It will not be able to be connected from > remote host or even in it own box in some case.I tried telnet localhost 9000 > ?it works, I means it can connect to the port but If I use telnet > 192.168.1.109 9000The errors displays like > $ telnet 192.168.1.109 9000Trying 192.168.1.109...telnet: Unable to connect > to remote host: Connection refused > I have spent almost a week figuring out the issue I am really exhausted now > and I hope someone can help me. > Note: I am not sure if namenode by default refuses remote connection. Do I > need to change some settings in order for it to allowremote connections? > Best regards,Woraphol > > -- Harsh J
