Apache Ambari Administration
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Setting Properties That Depend on Service Usernames/Groups

Some properties must be set to match specific service user names or service groups. If you have set up non-default, customized service user names for the HDFS or HBase service or the Hadoop group name, you must edit the following properties, using Services > Service.Name > Configs > Advanced:

HDFS Settings: Advanced


The same as the HDFS username. The default is "hdfs"


A single space followed by the HDFS username.


The HBase username. The default is "hbase".

MapReduce Settings: Advanced


A single space followed by the Hadoop group name.