Cloudera Docs

Known issues in Hue

This topic describes the Hue known issues for Cloudera Data Warehouse (CDW) Private Cloud.

Known issues identified in 1.5.0

DWX-12616: Hue limitation in CDW Private Cloud
Following are the known limitations in Hue in CDW Private Cloud 1.5.0:
  • Hue Importer does not support importing files more than 200 KB in size
  • Hue File Browser does not work if the HDFS service on the base cluster is configured for high availability
None.
DWX-13865: Hue File Browser does not work with HDFS HA
Hue File Browser is not accessible or displays a 403 error when you click on File Browser from the left assist panel in CDW Private Cloud if HDFS is configured for High Availability on the base cluster. Currently, Hue in CDW cannot obtain the hostname and the port from the HttpFS service on the base cluster. This is a known limitation.
You must manually build and specify the WebHDFS URL for Hue in CDW to connect to the HttpFS service on the base cluster.
  1. Log in to Cloudera Manager as an Administrator.
  2. Go to Clusters > Hive > Configuration and note the value present in the Kerberos Principal field.

    This is the Hive service account name.

  3. Go to Clusters > HDFS > HttpFS Advanced Configuration Snippet (Safety Valve) for httpfs-site.xml and click to add the following lines:

    Name: httpfs.proxyuser.hive.hosts, Value: *

    Name: httpfs.proxyuser.hive.groups, Value: *

    Replace hive with the actual Hive service account name.

  4. Click Save Changes and restart the HDFS service or the HttpFS role.
  5. Go to the Instances tab and note the hostname of the HttpFS role.
  6. Go to the Configuration tab and note the port for the hdfs.httpfs.http.port configuration from the RESTPort field.

    The default value of the hdfs.httpfs.http.port configuration is 14000.

  7. Use the hostname and the port to construct the WebHDFS URL as follows:
    https://[***HOSTNAME***]:[***PORT***]/webhdfs/v1
  8. Log in to the Data Warehouse service as a DWAdmin.
  9. Go to the Virtual Warehouse from which you want to connect Hue to the base cluster’s HDFS service and click > Edit.
  10. Go to CONFIGURATIONS > Hue, select hue-safety-valve from the Configuration files drop-down list and add the following lines:
    [hadoop]
[[hdfs_clusters]]
[[[default]]]
webhdfs_url=https://[***HOSTNAME***]:[***PORT***]/webhdfs/v1

    Specify the WebHDFS URL that you constructed earlier.

  11. Click Apply changes.

    Update the hue-safety-valve configuration for any Hive or Impala Virtual Warehouses from which you want to connect to the base cluster HDFS.

Known Issues identified before 1.4.1

DWX-9373: Unable to log into Hue as a local administrator
If you have logged into the CDP Management Console as a local administrator, then you may not be able to log into Hue and you may see the following error: “User is not authorized”.
To access Hue, you must add your username to your organization’s LDAP tree or log into the CDP Management Console using your LDAP credentials and then access Hue.