@Override
      public FanOutOneBlockAsyncDFSOutput doCall(Path p)
        throws IOException, UnresolvedLinkException {
        return createOutput(dfs, p.toUri().getPath(), overwrite, createParent, replication,
          blockSize, eventLoopGroup, channelClass, monitor, noLocalWrite);
      }
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