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From waqas latif <waqas...@gmail.com>
Subject Re: 8021 failed on connection exception: java.net.ConnectException: Connection refused at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095)
Date Wed, 16 May 2012 13:38:43 GMT
Hi Harsh,
I run this. but still there is no jobtracker and tasktracker in the jps
output. I only have datanode, namenode and secondarynamenode in jps output.

waqas

On Wed, May 16, 2012 at 3:28 PM, Harsh J <harsh@cloudera.com> wrote:

> You have configured a MR cluster, but it isn't up.
>
> Run:
>
> bin/start-mapred.sh
>
> Then check for "JobTracker" and "TaskTracker" in 'jps' output.
>
> Then re-run your example pi job, and it should go through.
>
> On Wed, May 16, 2012 at 6:51 PM, waqas latif <waqas254@gmail.com> wrote:
> > Hi I am trying to configure Hadoop 1.0. in pseudodistributed mode.
> >
> > But when I run the pi example given in the hadoop distribution, I get the
> > error mentioned in title. Can someone please help me and guide me how
> can I
> > fix this problem. Also its a request that please suggest solution as well
> > if possible along with pinpointing the problem.
> >
> > here is what i get by running jps
> >
> > 8322 Jps
> > 7611 SecondaryNameNode
> > 7474 DataNode
> > 7341 NameNode
> >
> > Here is complete error message.
> >
> > Number of Maps  = 10
> > Samples per Map = 100
> > Wrote input for Map #0
> > Wrote input for Map #1
> > Wrote input for Map #2
> > Wrote input for Map #3
> > Wrote input for Map #4
> > Wrote input for Map #5
> > Wrote input for Map #6
> > Wrote input for Map #7
> > Wrote input for Map #8
> > Wrote input for Map #9
> > Starting Job
> > 12/05/16 13:11:56 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 0 time(s).
> > 12/05/16 13:11:57 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 1 time(s).
> > 12/05/16 13:11:58 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 2 time(s).
> > 12/05/16 13:11:59 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 3 time(s).
> > 12/05/16 13:12:00 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 4 time(s).
> > 12/05/16 13:12:01 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 5 time(s).
> > 12/05/16 13:12:02 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 6 time(s).
> > 12/05/16 13:12:03 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 7 time(s).
> > 12/05/16 13:12:04 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 8 time(s).
> > 12/05/16 13:12:05 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:8021. Already tried 9 time(s).
> > java.net.ConnectException: Call to localhost/127.0.0.1:8021 failed on
> > connection exception: java.net.ConnectException: Connection refused
> >        at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095)
> >        at org.apache.hadoop.ipc.Client.call(Client.java:1071)
> >        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
> >        at org.apache.hadoop.mapred.$Proxy2.getProtocolVersion(Unknown
> > Source)
> >        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
> >        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
> >        at
> > org.apache.hadoop.mapred.JobClient.createRPCProxy(JobClient.java:480)
> >        at org.apache.hadoop.mapred.JobClient.init(JobClient.java:474)
> >        at org.apache.hadoop.mapred.JobClient.<init>(JobClient.java:457)
> >        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1260)
> >        at
> > org.apache.hadoop.examples.PiEstimator.estimate(PiEstimator.java:297)
> >        at
> org.apache.hadoop.examples.PiEstimator.run(PiEstimator.java:342)
> >        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> >        at
> org.apache.hadoop.examples.PiEstimator.main(PiEstimator.java:351)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> >        at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >        at java.lang.reflect.Method.invoke(Method.java:601)
> >        at
> >
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
> >        at
> > org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
> >        at
> > org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >        at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> >        at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> >        at java.lang.reflect.Method.invoke(Method.java:601)
> >        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
> > Caused by: java.net.ConnectException: Connection refused
> >        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> >        at
> > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
> >        at
> >
> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
> >        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:656)
> >        at
> > org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434)
> >        at
> > org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560)
> >        at
> > org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184)
> >        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1202)
> >        at org.apache.hadoop.ipc.Client.call(Client.java:1046)
> >        ... 24 more
>
>
>
> --
> Harsh J
>

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