When configuring Datameer to connect to a MapR cluster, the following error is displayed in the GUI when a user tries to save the new connection:
Error saving changes: MapR client needs to be configured with the resource-manager address! (Expecting yarn.resourcemanager.hostname in /opt/mapr/hadoop/hadoop-2.5.1/etc/hadoop/yarn-site.xml)
The MapR client is not configured properly. As of MapR 4, YARN must be configured for Datameer to connect to it.
To resolve this issue, please update the referenced yarn-site.xml file from the error message. Be sure that the yarn.resourcemanager.hostname property is present and points to the appropriate hostname for the YARN Resource Manager.