1. 2020-12-25 [1] sub hadoop-us =?gb18030?B?w 2. 2020-12-23 [1] ERROR [main] org.apache.hadoop.mapreduce.v2.app.MRApp hadoop-us =?gb18030?B?w 3. 2020-12-20 [1] unsubscribe hadoop-us MEB 4. 2020-12-17 [1] subscribe hadoop-us Junhong Xu 5. 2020-12-16 [2] HDFS upgrade skip versions? hadoop-us Wei-Chiu Chua