public static void startTracker(Configuration conf) throws IOException {
if (tracker != null) throw new IOException("JobTracker already running.");
while (true) {
try {
tracker = new JobTracker(conf);
break;
} catch (IOException e) {
LOG.log(Level.WARNING, "Starting tracker", e);
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
}
tracker.offerService();
}
