Hi,

I used to write PHP code to execute pig command, it worked well,
Now I switch to Java but seems it won't work, here is my code:

String pigCommand = "pig -x local -p ouput=/tmp my_pig_script.pig";

Runtime r = Runtime.getRuntime();
Process p;

int exitVal;

try {
p = r.exec(pigCommand);
exitVal = p.waitFor();
BufferedReader br = new BufferedReader(new
InputStreamReader(p.getInputStream()));
String line = null;

while((line = br.readLine()) != null) {
System.out.println(line);
}
br.close();

System.out.println("exitVal: " + exitVal);
System.out.println("Done");

If I run the that pig command in console directly, it works, if I replace
that
Pig command with other shell command say 'ping www.yahoo.com', and run the
java
Program, it works too. So what might be the problem?

Thanks.

Hi Dan,

1. Can't you print out the error messages by calling getErrorStream() on
the sub-process?
2. Is there any reason why you spawn a sub-process process rather than use
PigServer API?

Thanks,
Cheolsoo
On Wed, Jan 23, 2013 at 10:07 PM, Dan Yi <[EMAIL PROTECTED]> wrote:

> Hi,
>
> I used to write PHP code to execute pig command, it worked well,
> Now I switch to Java but seems it won't work, here is my code:
>
> String pigCommand = "pig -x local -p ouput=/tmp my_pig_script.pig";
>
>                 Runtime r = Runtime.getRuntime();
>                 Process p;
>
>                 int exitVal;
>
>                 try {
>                         p = r.exec(pigCommand);
>                         exitVal = p.waitFor();
>                         BufferedReader br = new BufferedReader(new
> InputStreamReader(p.getInputStream()));
>                         String line = null;
>
>                         while((line = br.readLine()) != null) {
>                                 System.out.println(line);
>                         }
>                         br.close();
>
>                         System.out.println("exitVal: " + exitVal);
>                         System.out.println("Done");
>
>
>
> If I run the that pig command in console directly, it works, if I replace
> that
> Pig command with other shell command say 'ping www.yahoo.com', and run the
> java
> Program, it works too. So what might be the problem?
>
> Thanks.
>
>