static void sleepIgnoreInterrupt(int retry) {
    try {
      Thread.sleep(ConnectionUtils.getPauseTime(100, retry));
    } catch (InterruptedException e) {
    }
  }
Create a {@link FanOutOneBlockAsyncDFSOutput}. The method maybe blocked so do not call it
inside an {@link EventLoop}.
hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputHelper.java