Running hadoop jar command from JAVA using Runtime.exec

Question

I am trying to run an hadoop jar command from JAVA using Runtime.exec. Below is the sample code:

Runtime.getRuntime().exec(new String[]{"bin/hadoop", "jar /home/hadoop/jar/test.jar /user/hduser/myinput/input /user/hduser/newoutput"});

However I am not getting the desired output. Below is my hadoop command which I want to execute from JAVA:

bin/hadoop jar /home/hadoop/jar/test.jar /user/hduser/myinput/input /user/hduser/newoutput

I am not getting any exception as well. Is the way Runtime.getRuntime().exec is used is wrong?

Nishu Tayal · Accepted Answer · 2016-04-27 10:33:21Z

1

Replace your command with following command:

Runtime.getRuntime().exec("HADOOP_HOME/bin/hadoop jar /home/hadoop/jar/test.jar /user/hduser/myinput/input /user/hduser/newoutput");

answered Apr 27, 2016 at 10:33

Nishu Tayal

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3 Comments

My file is in HADOOP_HOME is it still needed?

If your working directory is HADOOP_HOME and you are running within that, so its not needed

Are you sure it's the correct way to run this command because I don't see this working. It's also not throwing me an error or something.

Ram Ghadiyaram · Accepted Answer · 2016-09-07 16:33:12Z

1

Give the class name where you defined the driver code.

bin/hadoop jar /home/hadoop/jar/test.jar Package_name.className /user/hduser/myinput/input /user/hduser/newoutput

Ram Ghadiyaram

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answered Apr 27, 2016 at 18:22

Ishan Kumar

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