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From rahul patodi <patodira...@gmail.com>
Subject Re: TaskTracker Error
Date Thu, 25 Nov 2010 05:06:55 GMT
i think you should check your configuration file in the conf folder and add
the required entry in
core-site.xml, mapred-site.xml and hdfs-site.xml
for pseudo distributed mode you can refer:
http://hadoop-tutorial.blogspot.com/2010/11/running-hadoop-in-pseudo-distributed.html
for distributed mode you can refer:
http://hadoop-tutorial.blogspot.com/2010/11/running-hadoop-in-distributed-mode.html

 if you are using cloudera you can refer:
http://cloudera-tutorial.blogspot.com/

if you have any problem please leave a comment


-- 
-Thanks and Regards,
Rahul Patodi
Associate Software Engineer,
Impetus Infotech (India) Private Limited,
www.impetus.com
Mob:09907074413

On Thu, Nov 25, 2010 at 10:23 AM, 祝美祺 <henhaozhumeiqi@gmail.com> wrote:

> Hi ,
>      i am using 0.20.2.. when i try to start hadoop,the namenode ,datanode
> works will ,but i can't submit jobs.i look at the logs ,and find
>  the error like:
>
> 2010-11-25 12:38:02,623 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 0 time(s).
> 2010-11-25 12:38:03,626 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 1 time(s).
> 2010-11-25 12:38:04,627 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 2 time(s).
> 2010-11-25 12:38:05,629 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 3 time(s).
> 2010-11-25 12:38:06,631 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 4 time(s).
> 2010-11-25 12:38:07,636 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 5 time(s).
> 2010-11-25 12:38:08,641 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 6 time(s).
> 2010-11-25 12:38:09,644 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 7 time(s).
> 2010-11-25 12:38:10,645 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 8 time(s).
> 2010-11-25 12:38:11,649 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 9 time(s).
> 2010-11-25 12:38:11,651 ERROR org.apache.hadoop.mapred.TaskTracker: Caught
> exception: java.net.ConnectException: Call to localhost/127.0.0.1:9000failed on connection
exception: java.net.ConnectException: Connection
> refused
>  at org.apache.hadoop.ipc.Client.wrapException(Client.java:767)
> at org.apache.hadoop.ipc.Client.call(Client.java:743)
>  at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
> at $Proxy5.getProtocolVersion(Unknown Source)
>  at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:359)
> at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:106)
>  at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:207)
> at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:170)
>  at
> org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:82)
> at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1378)
>  at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:66)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1390)
>  at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:196)
> at org.apache.hadoop.fs.Path.getFileSystem(Path.java:175)
>  at
> org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:1033)
> at org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1720)
>  at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:2833)
> Caused by: java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>  at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:592)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
>  at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:404)
> at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:304)
>  at org.apache.hadoop.ipc.Client$Connection.access$1700(Client.java:176)
> at org.apache.hadoop.ipc.Client.getConnection(Client.java:860)
>  at org.apache.hadoop.ipc.Client.call(Client.java:720)
> ... 15 more
>
> Who can tell me how to solve this problem?
>
>

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