Relationship Between Hue and Other Components

HDFS

HDFS provides REST APIs to interact with Hue to query and operate HDFS files.

Hue packages a user request into interface data, sends the request to HDFS through REST APIs, and displays execution results on the web UI.

Hive

Hive provides Thrift interfaces to interact with Hue, execute Hive SQL statements, and query table metadata.

If you edit HQL statements on the Hue web UI, then, Hue submits the HQL statements to the Hive server through the Thrift APIs and displays execution results on the web UI.

YARN/MapReduce

MapReduce provides REST APIs to interact with Hue and query YARN job information.

If you go to the Hue web UI, enter the filter parameters, the UI sends the parameters to the background, and Hue invokes the REST APIs provided by MapReduce (MR1/MR2-YARN) to obtain information such as the status of the task running, the start/end time, the run log, and more.

Oozie

Oozie provides REST APIs to interact with Hue, create workflows, coordinators, and bundles, and manage and monitor tasks.

A graphical workflow, coordinator, and bundle editor are provided on the Hue web UI. Hue invokes the REST APIs of Oozie to create, modify, delete, submit, and monitor workflows, coordinators, and bundles.

Solr

Solr provides REST APIs to interact with Hue, define indexes, and search information.

In the Hue web UI, screening parameters are set using GUI controls. The parameter settings are sent to the Hue server. The Hue server invokes the REST APIs of Solr and transmits the results returned by Solr in JSON format to the Hue web UI. The Hue web UI then displays the results using icons and controls.

ZooKeeper

ZooKeeper provides REST APIs to interact with Hue and query ZooKeeper node information.

ZooKeeper node information is displayed in the Hue web UI. Hue invokes the REST APIs of ZooKeeper to obtain the node information.