Managing Metadata Extraction

To enable metadata extraction for specific services, see the following tasks:

Enabling Hive Metadata Extraction in a Secure Cluster

Minimum Required Role: Navigator Administrator (also provided by Full Administrator)

The Navigator Metadata Server uses the hue user to connect to the Hive Metastore. The hue user is able to connect to the Hive Metastore by default. However, if the Hive service Hive Metastore Access Control and Proxy User Groups Override property and/or the HDFS service Hive Proxy User Groups property have been changed from their default values to settings that prevent the hue user from connecting to the Hive Metastore, Navigator Metadata Server will be unable to extract metadata from Hive. If this is the case, modify the Hive service Hive Metastore Access Control and Proxy User Groups Override property and/or the HDFS service Hive Proxy User Groups property so that the hue user can connect as follows:
  1. Go to the Hive or HDFS service.
  2. Click the Configuration tab.
  3. In the Search box, type proxy.
  4. In the Hive service Hive Metastore Access Control and Proxy User Groups Override or the HDFS service Hive Proxy User Groups property, click to add a new row.

    If more than one role group applies to this configuration, edit the value for the appropriate role group. See Modifying Configuration Properties Using Cloudera Manager.

  5. Type hue.
  6. Click Save Changes to commit the changes.
  7. Restart the service.

Enabling Spark Metadata Extraction

Minimum Required Role: Navigator Administrator (also provided by Full Administrator)

Spark is an unsupported service and by default Spark metadata extraction is disabled. To enable Spark metadata extraction:
  1. Do one of the following:
    • Select Clusters > Cloudera Management Service > Cloudera Management Service.
    • On the Status tab of the Home > Status tab, in Cloudera Management Service table, click the Cloudera Management Service link.
  2. Click the Configuration tab.
  3. Select Scope > Navigator Metadata Server.
  4. In Navigator Metadata Server Advanced Configuration Snippet (Safety Valve) for cloudera-navigator.properties, set the property 
    nav.spark.extraction.enable=true

    If more than one role group applies to this configuration, edit the value for the appropriate role group. See Modifying Configuration Properties Using Cloudera Manager.

  5. Click Save Changes to commit the changes.
  6. Restart the role.