Hadoop核心源码实例解读(2)

@Override
      public void run() {
        spillLock.lock();
        spillThreadRunning = true;
        try {
          while (true) {
            spillDone.signal();
            while (!spillInProgress) {
              spillReady.await();
            }
            try {
              spillLock.unlock();
              sortAndSpill();
            } catch (Throwable t) {
              sortSpillException = t;
            } finally {
              spillLock.lock();
              if (bufend < bufstart) {
                bufvoid = kvbuffer.length;
              }
              kvstart = kvend;
              bufstart = bufend;
              spillInProgress = false;
            }
          }
        } catch (InterruptedException e) {
          Thread.currentThread().interrupt();
        } finally {
          spillLock.unlock();
          spillThreadRunning = false;
        }
      }
    }