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Subject: Re: How running hadoop without command line?
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From: Vladimir Klimontovich <klimontovich@gmail.com>
In-Reply-To: <25167322.post@talk.nabble.com>
Date: Thu, 27 Aug 2009 18:51:18 +0400
Cc: core-user@hadoop.apache.org
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Message-Id: <5BCBDA7F-DED4-4B9D-B0AA-BB0A5E9D67C9@gmail.com>
References: <25167322.post@talk.nabble.com>
To: common-user@hadoop.apache.org

There is a class called JobClient. You can run jobs using these class  
from java app.
Also hadoop jar adds $HADOOP_HOME/conf/hadoop-site.xml and  
$HADOOP_HOME/conf/hadoop-conf.xml
xml to classpath, so JobClient already knows which jobtracker and FS  
should be used for running map process.

So when you are running hadoop jobs inside other application you  
should take care of setting valid properties
for jobtracker address, FS address and etc. You can set it manually or  
use Configuratio.addResource for
adding $HADOOP_HOME/conf/hadoop-conf.xml and $HADOOP_HOME/conf/hadoop- 
site.xml .

On Aug 27, 2009, at 1:06 PM, radar.sxl wrote:

>
> When run a hadoop project jar, We'll use
> $ bin/hadoop jar ***.jar
> but if I hava a java app, i want to run mapreduce job inside it use  
> hadoop
> cluster, is three anyway?
> -- 
> View this message in context: http://www.nabble.com/How-running-hadoop-without-command-line--tp25167322p25167322.html
> Sent from the Hadoop core-user mailing list archive at Nabble.com.
>

---
Vladimir Klimontovich,
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