Some properties must be set to match specific service usernames or service groups. If you have set up non-default, customized service usernames for the HDFS or HBase service or the Hadoop group name, you must edit the following properties:
Table 3.1. HDFS Settings: Advanced
| Property Name | Value |
|---|---|
| dfs.permissions.supergroup | The HDFS username. The default is "hdfs" |
| dfs.cluster.administrators | A single space followed by the HDFS username. |
| dfs.block.local-path-access.user | The HBase username. The default is "hbase". |
Table 3.2. MapReduce Settings: Advanced
| Property Name | Value |
|---|---|
| mapreduce.tasktracker.group | The Hadoop group name. The default is "hadoop". |
| mapreduce.cluster.administrators | A single space followed by the Hadoop group name. |
