使用Runtime.exec从JAVA运行hadoop jar命令

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?

Answer 1

用以下命令替换您的命令：

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

Answer 2

在定义驱动程序代码的位置输入类名称。

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