Re: RE: Re: Hadoop for perl

Fri, 23 Mar 2007 20:39:45 -0800 

Actually, I am using the following configuration file

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
    <property>
        <name>fs.default.name</name>
        <value>dist:22</value>
        <description>The name of the job.</description>
    </property>
    <property>
        <name>mapred.job.tracker</name>
        <value>dist:90007</value>
        <description>The name of the job.</description>
    </property>
    <property> 
        <name>mapred.map.tasks</name>
        <value>1</value>
        <description>
            define mapred.map tasks to be number of slave hosts
        </description> 
    </property> 
    
    <property> 
        <name>mapred.reduce.tasks</name>
        <value>1</value>
        <description>
            define mapred.reduce tasks to be number of slave hosts
        </description> 
    </property> 
    

    
    <property>
        <name>dfs.replication</name>
        <value>1</value>
</property>

</configuration>

and the following comman

bin/hadoop jar hadoop-*-examples.jar wordcount ./myfs/LICENSE.txt ./myFS/out 

I have already executed ./bin/start-all.sh and I have formatted ./myFS/


Richard Yang <[EMAIL PROTECTED]> έγραψε: 
By the error message, it looks like 'workingdirectory' is out of touch.  Is
HDFS dfs portion functioning normally??

Best Regards
 
Richard Yang
[EMAIL PROTECTED]
[EMAIL PROTECTED]
 
 
-----Original Message-----
From: Andreas Papadakis [mailto:[EMAIL PROTECTED] 
Sent: Friday, March 23, 2007 1:18 PM
To: [email protected]
Subject: Re: Re: Hadoop for perl

Is there any other way to use hadoop with perl?

I read that I can use it with python(using jython)... I tried the example
but jython cannot find the module org.apache.hadoop.fs...(I dont know much
about java). Anyone knows where can I find that module and where should I
place it??

Also, I tried the java example and I get too many errors....
I used the command
bin/hadoop jar hadoop-*-examples.jar wordcount  mydfs/LICENSE.txt mydfs/a

but I get the following errors:

java.lang.RuntimeException: java.net.SocketTimeoutException: timed out
waiting for rpc response
        at
org.apache.hadoop.mapred.JobConf.getWorkingDirectory(JobConf.java:247)
        at org.apache.hadoop.mapred.JobConf.setInputPath(JobConf.java:150)
        at org.apache.hadoop.examples.WordCount.main(WordCount.java:137)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver
.java:71)
        at
org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:143)
        at
org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:40)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:155)
Caused by: java.net.SocketTimeoutException: timed out waiting for rpc
response
        at org.apache.hadoop.ipc.Client.call(Client.java:469)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:164)
        at org.apache.hadoop.dfs.$Proxy0.getProtocolVersion(Unknown Source)
        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:248)
        at org.apache.hadoop.dfs.DFSClient.(DFSClient.java:106)
        at
org.apache.hadoop.dfs.DistributedFileSystem.initialize(DistributedFileSystem
.java:65)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:160)
        at org.apache.hadoop.fs.FileSystem.getNamed(FileSystem.java:119)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:91)
        at
org.apache.hadoop.mapred.JobConf.getWorkingDirectory(JobConf.java:243)

Anyone can help me???
Thank you

Erik Hetzner  έγραψε: At Fri, 23 Mar 2007 20:58:38
+0100,
Maximilian SchΓΆfmann  wrote:
>
> > I want to ask if there is an implementation of Hadoop for perl...or
> > something similar to Hadoop for python
>
> Well, there is one for Ruby - at least the MapReduce part: Starfish
>
> http://rufy.com/starfish/doc/

Starfish isnβ&#65533;&#65533;t (or wasnβ&#65533;&#65533;t last time I
looked) really much like
MapReduce at all.

best,
Erik Hetzner


   
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