I just encountered such a problem in learning Hadoop get started -sharp bin hdfs dfs -ls drwxr-xr-x - zhugw supergroup 0 2018-11-17 17:11 output drwxr-xr-x - zhugw supergroup 0 2018-11-17 18:02 pv_users_count -sharp bin hdfs df...
when running hadoop streaming, an error is reported. The exception content is as follows: Error: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 126 at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads...