RE: Passing Args to Mappers and Reducers

Hi Ista, In general we need to give after specifying the class name like ./yarn jar ../share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.0.0-SNAPSHOT.jar sleep -Dmapreduce.job.queuename=default -m 10 -r 1 -mt 5000 i think in your case it should be

Re: Passing Args to Mappers and Reducers

Two configurations are used to pass command line opts to mappers and reducers. These are mapreduce.map.java.opts and mapreduce.reduce.java.opts for mappers and reducers respectively. There is a configuration named mapred.child.java.opts if you want same arguments to be passed to both mappers and

Re: Passing Args to Mappers and Reducers

Hi Naga, Thx for the follow up. Still not working. Here are the invocation errors and the source code. [image: Inline image 1] public class AvgSix extends Configured implements Tool{ public static void main(String[] args) throws Exception { Configuration conf = new Configuration();

RE: Passing Args to Mappers and Reducers

Hi Ista, In general we need to give after specifying the class name like ./yarn jar ../share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.0.0-SNAPSHOT.jar sleep -Dmapreduce.job.queuename=default -m 10 -r 1 -mt 5000 I think in your case it should be "yarn jar

WritableComparator implements Configurable

Hi, I am trying to get the object Configuration (created from my main file) from my custom object WritableComparator: My custom object WritableComparator public class KeyComparator extends WritableComparator implements Configurable { private Configuration conf; public

Yarn doesn't start mappers fast enough

Hallo everyone, I have a problem with my yarn setup and hope you can help me. I already searched for this issue but didn't find anything. My problem is that yarn doesn’t start new mappers fast enough. This results in a poor cluster utilization. Setup: - 8 nodes @64cores+128GB - Hadoop

Fw: new message

Hello! New message, please read Jason Sun

Fw: new message

Hello! New message, please read Help Desk

Fw: new message

Hello! New message, please read ACM Local Activities

Fw: new message

Hello! New message, please read Ram

Fw: new message

Hello! New message, please read Vinod Kumar Vavilapalli

Fw: new message

Hello! New message, please read Leon Gu

Fw: new message

Hello! New message, please read Zhu Tao

Fw: new message

Hello! New message, please read Grace Hui Yang

Fw: new message

Hello! New message, please read Carnegie Mellon Alumni Relations

Fw: new message

Hello! New message, please read Y.H.

Fw: new message

Hello! New message, please read Stephan Vogel

Fw: new message

Hello! New message, please read Jack Gmail

Fw: new message

Hello! New message, please read Stephan Vogel

Fw: new message

Hello! New message, please read sajid mohammed

Fw: new message

Hello! New message, please read Y.H.

Fw: new message

Hello! New message, please read Linda Hager

Fw: new message

Hello! New message, please read Changkuk Yoo

Fw: new message

Hello! New message, please read Benjamin Lambert

Fw: new message

Hello! New message, please read Eric Nyberg

Fw: new message

Hello! New message, please read W. Zhu

Fw: new message

Hello! New message, please read Mike Grzywinski

Fw: new message

Hello! New message, please read Maxine Eskenazi

Fw: new message

Hello! New message, please read Eric Nyberg

Fw: new message

Hello! New message, please read Dipanjan Das

Fw: new message

Hello! New message, please read Ram

Fw: new message

Hello! New message, please read KayVajj

Fw: new message

Hello! New message, please read Amit Mittal

{Spam?} Fw: new message

Hello! New message, please read lez...@cs.cmu.edu

Fw: new message

Hello! New message, please read Amit Mittal

Fw: new message

Hello! New message, please read Krishna Rao

Fw: new message

Hello! New message, please read Meryem Pinar Donmez

Fw: new message

Hello! New message, please read Jason Chen

Fw: new message

Hello! New message, please read Andy Tumas

Fw: new message

Hello! New message, please read Mary Jo Bensasi

Fw: new message

Hello! New message, please read Dana Houston

Fw: new message

Hello! New message, please read OIE

Fw: new message

Hello! New message, please read Changkuk Yoo

Fw: new message

Hello! New message, please read zhang lixin

Fw: new message

Hello! New message, please read minin...@hotmail.com

Passing Args to Mappers and Reducers

Greetings to all, Is it possible to pass args to Mapper and Reducers via the command line args. I need to pass some args upon the MapRed job invocation so that I can pass these args via the Context object to the Mapper and Reducer code. I am currently running Hadoop2.7 and tried to pass some args

Re: Passing Args to Mappers and Reducers

Are you properly implementing the Tool interface? https://hadoopi.wordpress.com/2013/06/05/hadoop-implementing-the-tool-interface-for-mapreduce-driver/ Also, there needs to be space between -D and the param name. Regards, Shahab On Tue, Oct 6, 2015 at 9:22 AM, Istabrak Abdul-Fatah

Re: Passing Args to Mappers and Reducers

Hi Istabrak, Sorry had misunderstood your query a little. The code written is a little bit wrong. You are not really using the Tool class. You can change the code as under : public static void main(String[] argv) throws Exception { int ret = ToolRunner.run(null, new AvgSix(), argv));

Re: Passing Args to Mappers and Reducers

Hi Shahab, Thx for the quick reply. Yes, I am using the tool interface and can run the job successfully. I need to pass some extra args dynamically as part of the invocation. I have tried adding a space after the -D option and it did not work either (see below). ~]$ yarn -D ista="66" jar