Illegal thread state exception.

Question

I created a thread that runs a process with some 1 gb of data throughput. the process exits for low data. but for huge data. it says illegal thread state of exception.
sample code :
Runtime rt = Runtime.getRuntime();
Process child =rt.exec("myprocess.exe hugefile.txt");
child.exitValue();
here hugefile.txt contains some 30000 lines of text.
for thisdata. its shouldnt work.
can u suggest me one of the efficient and effective code for
thread processing.
please help me.

Answer 1

You are calling exitValue() before the process exists (and so there's no exit value).
You have to call waitFor() to wait for it to finish.
Process process = Runtime.getRuntime().exec("myprocess.exe hugefile.txt");
int exitValue = process.waitFor(); // You don't have to call exitValue() since waitFor() will also return the exit value