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From jason hadoop <jason.had...@gmail.com>
Subject Re: Running hadoop in standalone mode using Eclipse
Date Thu, 18 Jun 2009 03:01:21 GMT
The code bundles with my book are setup to run the examples stand alone in
eclipse.
In your case you have to set the JAVA System Property hadoop.log.dir to
something


On Wed, Jun 17, 2009 at 11:41 AM, Philip Zeyliger <philip@cloudera.com>wrote:

> Hi George,
>
> You're probably missing a handful of Java properties.  One way to
> figure out which is to run it on the commandline, look at the
> commandline with ps (you'll want the -ww flag to see the entire
> thing), and adjust your Eclipse launch appropriately.
>
> You could also try to patch in
> https://issues.apache.org/jira/browse/HADOOP-5911 .  That's got
> .launch files for NameNode, DataNode, JobTracker, and TaskTracker that
> work for me, as well as one that I clone for running a given test.  If
> those work for you, please do leave a note on the ticket.
>
> -- Philip
>
> On Sun, Jun 14, 2009 at 10:31 AM, George Kovoor
> <kovoor.george@googlemail.com> wrote:
> >
> > Hi,
> > I would like know how to run hadoop in standalone mode within eclipse, I
> am
> > able to run it from outside eclipse, using
> > /bin/hadoop <fully qualified classname> <args>
> > From within eclipse I keep getting the following errors even after
> setting
> > the working directory to the root install path
> >
> > log4j:WARN No appenders could be found for logger
> > (org.apache.hadoop.conf.Configuration).
> > log4j:WARN Please initialize the log4j system properly.
> > Exception in thread "main" java.lang.NullPointerException
> >    at
> > org.apache.hadoop.conf.Configuration.getLocalPath(Configuration.java:788)
> >    at org.apache.hadoop.mapred.JobConf.getLocalPath(JobConf.java:232)
> >    at
> >
> org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:83)
> >    at
> >
> org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:306)
> >    at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:843)
> >    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1142)
> >    at org.apache.hadoop.examples.WordCount.run(WordCount.java:154)
> >    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> >    at org.apache.hadoop.examples.WordCount.main(WordCount.java:160)
> >
> > It is definitively a configuration error, I would like to know the conf
> > parameter that I need to include in the class file.
> >
> > Thanks
> > George.
>



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