How to verify if external process terminated abnormally?

Question

Following code snippet runs external process:

ProcessBuilder pb = new ProcessBuilder("C:\\Program Files\\Java\\jdk1.8.0_111\\bin\\java.exe", 
                "-cp",
                "D:\\nsd-rest\\target\\classes",
                "com.dataart.ExternalProcess"); //java -cp D:\nsd-rest\target\classes my.package.ExternalProcess
Process process = pb.start();
System.out.println(process.waitFor(10, TimeUnit.SECONDS)); // prints true

The external process looks like this:

public class ExternalProcess {
    public static void main(String[] args) { 
       throw new RuntimeException();
    }
}

The first snippet prints true despite exception throwns from external process.

Is there way to verify that if process finished abnormally ?

Answer 1

From the Process#waitFor(long timeout, TimeUnit unit) Javadoc

Returns: true if the subprocess has exited and false if the waiting time elapsed before the subprocess has exited.

You can use the Process#exitValue() to retrieve the exit value, and check if it's != 0

Returns: the exit value of the subprocess represented by this Process object. By convention, the value 0 indicates normal termination.