040000 tree 3ca3a952a15dcb7d7fd67c8735d2fe518b67cf26	hadoopfs
040000 tree 7e68856ed3f51c22f9b31be0989975033abf27a7	hbase
040000 tree 26259600e098394b9af07916f577bb6f0da9b79d	kafka
040000 tree 681e8250e21d85e12451815f32caf2f601f13630	monoid
040000 tree fc874ba2b56f1cf1c41e12e5b8b400d192843eda	serializer