mapreduce.task.timeout=0 configuration used to disable timeout doesn't work

          if (sendProgress) {
            // we need to send progress update
            updateCounters();
            checkTaskLimits();
            taskStatus.statusUpdate(taskProgress.get(),
                                    taskProgress.toString(),
                                    counters);
            amFeedback = umbilical.statusUpdate(taskId, taskStatus);
            taskFound = amFeedback.getTaskFound();
            taskStatus.clearStatus();
          }
          else {
            // send ping 
            amFeedback = umbilical.statusUpdate(taskId, null);
            taskFound = amFeedback.getTaskFound();
          }