Minor Description
When using other file system other than hdfs, users see warning message regarding hdfs chgrp. The warning is very annoying and confusing. We'd better remove it.
The warning example:
hive> insert overwrite table s3_test select total_emp, salary, description from sample_07 limit 5; -chgrp: '' does not match expected pattern for group Usage: hadoop fs [generic options] -chgrp [-R] GROUP PATH... Total jobs = 1 Launching Job 1 out of 1 Number of reduce tasks determined at compile time: 1 In order to change the average load for a reducer (in bytes): set hive.exec.reducers.bytes.per.reducer=<number>