Hue/Hive user root is not allowed to impersonate Hue

Question

Situation: I have set up Hive, Hue and Hadoop in different Docker Containers. In the same Docker network. I created a Container for each 1 Hadoop Namenode, 2 Datanodes,1 Hue instance, 1 Hive Server and a Postgres Metastore. I was able to configure a hue proxy user in the hdfs-site.xml of the namenode and can browse the filesystem via webhdfs. For Hive however I get the error within Hue:

Failed to open new session: java.lang.RuntimeException: 
org.apache.hadoop.ipc.RemoteException
(org.apache.hadoop.security.authorize.AuthorizationException):
User: root is not allowed to impersonate hue

I am able to create Hive tables in Hive or write to them from within Sparkjobs for example.

What I've tried so far:

I've tried adding properties like

• hive.server2.proxy.user = hue
• hive.server2.enable.impersonation=true
• hadoop.proxyuser.hue.hosts=*
• hive.server2.authentication=NONE

in different configuration files like:

• core-site.xml in hdfs-namenode configuration folder
• core-site.xml in hive-hadoop folder
• hdfs-site.xml in both
• hive-site.xml in hive-conf folder

Most of this was suggested in similar questions but it does not seem up to-date anymore. For some properties Hive says: Property unknown

What I need clarification on:

• What is the right file to add the configuration to ?
• What is the right property to add ?
• Do I have to add some configuration to hue regarding the metastore ?

Additional Information: - Hive Version: 2.3.1 - Hive Hadoop Version: 2.7.4 - Hadoop Cluster Version: 2.7.2 (I think version difference should not be the problem here ?!)

Hue Version: 4 (gethue/hue:latest form docker-hub)

• The full error log here
• Hive configuration here
• HDFS-site configuration here

Answer 1

Okay I found a solution that works:

Add the following properties to the hadoop namenodes and datanodes core-site.xml:

<property>
  <name>hadoop.proxyuser.root.groups</name>
  <value>*</value>
</property>
<property>
  <name>hadoop.proxyuser.root.hosts</name>
  <value>*</value>
</property>

Furthermore you need to set the path to Hive config if Hive is running on another machine/container in the hue .ini file and copy the hive-config folder to your hue container/machine.

Note that in the Hue docs the configuration for WebHdfs is done in the hdfs-site.xml and the hive configuration is done in hive-site.xml