Hi all,
I am writing an application in which I create a forked process to execute a
specific Map/Reduce job. The problem is that when I try to read the output
stream of the forked process I get nothing and when I execute the same job
manually it starts printing the output I am expecting. For clarification I will
go through the simple code snippet:
Process p = rt.exec("hadoop jar GraphClean args");
BufferedReader reader = new BufferedReader(new
InputStreamReader(p.getInputStream()));
String line = null;
check = true;
while(check){
line = reader.readLine();
if(line != null){// I know this will not finish it's only for testing.
System.out.println(line);
}
}
If I run this code nothing shows up. But if execute the command (hadoop jar
GraphClean args) from the command line it works fine. I am using hadoop 0.19.0.
Thanks,
Razen
