protected boolean updateProgress() {
    if (reporter != null &&
        (System.currentTimeMillis() - lastProgressReport) > timeOut) {
      reporter.progress();
      lastProgressReport = System.currentTimeMillis();
      return true;
    } else {
      return false;
    }
  }
Report status to JT so that JT won't kill this task if closing takes too long
due to too many files to close and the NN is overloaded.

@return true if a new progress update is reported, false otherwise.
ql/src/java/org/apache/hadoop/hive/ql/exec/FileSinkOperator.java