Cavus,M.,Fa. Post Direkt wrote:
I process this
./hadoop jar ../../hadoopjar/hd.jar org.postdirekt.hadoop.WordCount gutenberg
gutenberg-output
I get this
Dıd anyone know why I get this Error?
10/12/30 16:48:59 INFO security.Groups: Group mapping
impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000
10/12/30 16:49:01 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 0 time(s).
10/12/30 16:49:02 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 1 time(s).
10/12/30 16:49:03 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 2 time(s).
10/12/30 16:49:04 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 3 time(s).
10/12/30 16:49:05 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 4 time(s).
10/12/30 16:49:06 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 5 time(s).
10/12/30 16:49:07 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 6 time(s).
10/12/30 16:49:08 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 7 time(s).
10/12/30 16:49:09 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 8 time(s).
10/12/30 16:49:10 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:9001. Already tried 9 time(s).
Exception in thread "main" java.net.ConnectException: Call to
localhost/127.0.0.1:9001 failed on connection exception: java.net.ConnectException:
Connection refused
at org.apache.hadoop.ipc.Client.wrapException(Client.java:932)
at org.apache.hadoop.ipc.Client.call(Client.java:908)
at
org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:198)
at $Proxy0.getProtocolVersion(Unknown Source)
at
org.apache.hadoop.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:228)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:224)
at org.apache.hadoop.mapreduce.Cluster.createRPCProxy(Cluster.java:82)
at org.apache.hadoop.mapreduce.Cluster.createClient(Cluster.java:94)
at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:70)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:129)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:134)
at org.postdirekt.hadoop.WordCount.main(WordCount.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:192)
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
at
org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:373)
at
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:417)
at org.apache.hadoop.ipc.Client$Connection.access$1900(Client.java:207)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1025)
at org.apache.hadoop.ipc.Client.call(Client.java:885)
... 15 more
This is the most common issue occured after configuring Hadoop Cluster.
Reason :
1. Your NameNode, JobTracker is not running. Verify through Web UI and
jps commands.
2. DNS Resolution. You must have IP hostname enteries if all nodes in
/etc/hosts file.
Best Regards
Adarsh Sharma
