I presume you are running these chmod commands in a loop – otherwise I don’t see why you’d get so many exceptions. It’s possible that you’re hitting a deadlock because you’re not reading the output of the spawned processes. That certainly used to bite me back in the pre-ProcessBuilder
, Runtime.exec()
days.
Change your code snippet to the above pattern:
try {
ProcessBuilder pb = new ProcessBuilder("/bin/chmod", "777", path);
pb.redirectErrorStream(true); // merge stdout, stderr of process
Process p = pb.start();
InputStreamReader isr = new InputStreamReader(p.getInputStream());
BufferedReader br = new BufferedReader(isr);
String lineRead;
while ((lineRead = br.readLine()) != null) {
// swallow the line, or print it out - System.out.println(lineRead);
}
int rc = p.waitFor();
// TODO error handling for non-zero rc
}
catch (IOException e) {
e.printStackTrace(); // or log it, or otherwise handle it
}
catch (InterruptedException ie) {
ie.printStackTrace(); // or log it, or otherwise handle it
}
(credit: this site) and see if that helps the situation.