Cloudera Docs

Known issues and limitations in Cloudera Data Visualization 8.0.8

Learn about the known issues and limitations that you might experience while using Cloudera Data Visualization. You can find information about the areas of impact, affected product versions, and possible workarounds.

Picklist in complex data types Show Selected unselects previous selections
Show selected in a filter list selection may not show all selections depending on the data type. A fix is expected in a future release.
Workaround
None
Versions affected
Cloudera Data Visualization 7.0.2 - 8.1.4
Fixed in version
N/A
Cloudera issue
VIZ-456
Inconsistent support for non-roman or character-based alphabets across visual types
Non-romanized or character-based alphabets are not consistently supported across various visual types. If not supported, the affected visual is not properly rendered in PDF/PNG downloads. CSV/Excel downloads and general dashboard viewing is available for all languages.

The following languages are not supported when using a table visual.

In Cloudera AI: In Cloudera Data Warehouse:
  • Amharic (Ethiopia)
  • Arabic (multiple countries)
  • Bengali (Bangladesh)
  • Berber (multiple countries)
  • Burmese (Myanmar)
  • Dari Pashto (Afghanistan)
  • Dzongkha (Bhutan)
  • Fijian (Fiji)
  • Georgian
  • Hebrew (Israel)
  • Khmer (Cambodia)
  • Lao
  • Malay (Brunei)
  • Many Indian languages
  • Nepalese (Nepal)
  • Persian (Iran)
  • Tamil (Malaysia, India, Singapore)
  • Thai (Thailand)
  • Urdu (Pakistan)
  • Amharic (Ethiopia)
  • Bengali (Bangladesh)
  • Burmese (Myanmar)
  • Dzongkha (Bhutan)
  • Fijian (Fiji)
  • Khmer (Cambodia)
  • Many Indian languages
  • Nepalese (Nepal)
  • Tamil (Malaysia, India, Singapore)
  • Thai (Thailand)
Workaround
None
Versions affected
Cloudera Data Visualization 7.0.2 - 8.1.4
Fixed in version
N/A
Cloudera issue
VIZ-984
Saved value does not show properly when arcapi is present
After the fix included for VIZ-1070, a known issue is still present when using arcapi.sendParameters with app-scope filters.
Workaround
None
Versions affected
Cloudera Data Visualization 7.0.2 - 8.1.4
Fixed in version
N/A
Cloudera issue
VIZ-1181
Selecting NULL values can cause ParseException syntax error from Cloudera Data Visualization 7.1.3
After upgrading to Cloudera Data Visualization 7.1.3 or later, selecting "NULL" values in filters may lead to a ParseException syntax error.
Workaround:
To resolve this issue, deselect the “NULL” value in the picklist filter.
Versions affected:
Cloudera Data Visualization 7.1.3 - 8.1.4
Fixed in version:
N/A
Cloudera issue:
VIZ-2224
Long-running queries cannot be canceled for some data connections

For data connections other than Hive or Impala, long-running queries cannot be canceled since they are run synchronously.

Workaround:

Restart the Cloudera Data Visualization application.

Versions affected:
All versions
Fixed in version:
N/A
Cloudera issue:
VIZ-2634
Impala over Knox connection fails with load balancing

HTTP connections to Impala through Knox with load balancing enabled can fail with Invalid session id errors because a hard-coded impala.session.id cookie name does not match Knox’s default sticky-session cookies.

Workaround:
None
Versions affected:
Cloudera Data Visualization7.2.7 - 8.1.1
Fixed in version:
Cloudera Data Visualization 8.1.1
Cloudera issue:
VIZ-2955
Data compatibility check does not work for SQL-based datasets that join on multiple tables

When importing in visual artifacts that use SQL-based datasets, the “data compatibility” check may fail with an “IndexError: list index out of range” error, if the dataset joins multiple tables.

Workaround:

Disable “Check data table compatibility” when importing in visual assets with complex queries.

Versions affected:
All versions
Fixed in version:
N/A
Cloudera issue:
VIZ-3121
Show Usage Info setting and Ctrl+Shift+G shortcut do not work on all pages

When the Show Usage Info site setting is enabled, the Profile Data modal does not open on certain pages. The Ctrl+Shift+G keyboard shortcut for viewing page profiles also does not work on those pages.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.0.4 and higher
Fixed in version:
N/A
Cloudera issue:
VIZ-3341
Queries on databases with numeric names fail in Trino

When querying databases in Trino whose names begin with numbers, queries fail with a syntax error.

Workaround:

Escape the database name in the query.

For example: SHOW TABLES FROM "impala"."999_test_cdv"; instead of SHOW TABLES FROM impala.999_test_cdv;

Versions affected:
Cloudera Data Visualization 8.0.0 - 8.0.9
Fixed in version:
Cloudera Data Visualization 8.1.0
Cloudera issue:
VIZ-3481
Editing a user group may remove users not loaded in the editor

When you edit a group on the Manage Users and Groups page, only the first 10 users are loaded due to pagination. If you save the group without making changes, the system updates the group membership to include only those loaded users, removing any additional members that were not visible in the editor.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.2.2 - 8.0.8
Fixed in version:
Cloudera Data Visualization 8.0.9
Cloudera issue:
VIZ-3610
CSV and Excel downloads are missing file extensions

Backend-generated CSV and Excel files downloaded from Cloudera Data Visualization are saved without file extensions. As a result, some systems may not recognize the file type automatically or may not open the files correctly.

Workaround:

Manually add the appropriate file extension to the downloaded file name before opening it.

Versions affected:
Cloudera Data Visualization 8.0.7 - 8.0.8
Fixed in version:
Cloudera Data Visualization 8.0.9
Cloudera issue:
VIZ-3646
Impala connection discovery may select an incorrect endpoint

On Cloudera Base on premises clusters with multiple Impala services or dedicated coordinators, Cloudera Data Visualization may connect to an incorrect Impala endpoint during connection discovery. This can result in connection failures, such as TSocket read 0 bytes errors.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.8
Fixed in version:
Cloudera Data Visualization 8.0.9
Cloudera issue:
VIZ-3651
Modifying the Result Cache of a data connection through the UI causes associated queries to fail

When the Result Cache is enabled on a data connection with a Cache Retention Timeout value, the following error occurs when a visual is loaded for the second time:

- error: '\u003C' not supported between instances of 'float' and 'str'

Workaround:

Configure the Result Cache setting at the dataset level instead of the data connection level.

Alternatively, use the AdminAPI to programmatically update the data connection’s cache properties. For more information, see Admin API Demo.

Versions affected:
Cloudera Data Visualization 8.0.2 - 8.0.8
Fixed in version:
Cloudera Data Visualization 8.0.9
Cloudera issue:
VIZ-3656
HTML links in table visuals do not render as clickable links

In table visuals, custom expressions that generate HTML anchor tags (for example, <a href="https://…">ID</a>) are displayed as raw HTML instead of clickable links. This occurs even when the Show values starting with http(s):// as links option is enabled.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.2.5 - 8.0.9
Fixed in version:
Cloudera Data Visualization 8.1.0
Cloudera issue:
VIZ-3688
AI-generated streaming responses may be incomplete

In Cloudera Data Visualization, AI-generated responses in visuals may be truncated or incomplete when streaming over slow or high-latency network connections. This occurs because the streaming parser may not process all incoming data correctly.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.0 - 8.0.9
Fixed in version:
Cloudera Data Visualization 8.1.0
Cloudera issue:
VIZ-3701
Search on the Data tab does not work

Search on the Data page is not functional, so datasets cannot be found using the search field.

Workaround:

Browse datasets manually until the issue is resolved.

Versions affected:
Cloudera Data Visualization 8.0.5 - 8.0.9
Fixed in version:
Cloudera Data Visualization 8.1.0
Cloudera issue:
VIZ-3709
Time modeling does not work

Visuals configured with Time modeling do not animate over time as expected.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.1.4 and lower
Fixed in version:
N/A
Cloudera issue:
VIZ-3896
Scatter visual displays "NaN" or "undefined" during transition animation

When transition animation is enabled on a scatter visual, data labels may temporarily display "NaN" or "undefined" instead of numeric values while stepping through time frames. This issue affects only the label rendering; the underlying data remains correct.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.1.9 - 8.1.1
Fixed in version:
Cloudera Data Visualization 8.1.2
Cloudera issue:
VIZ-3962
Selection brush for time ranges does not work correctly with sub-second timestamp resolution

The zoom and selection brush functionality on line chart visuals does not work as expected when the X-axis uses timestamps with sub-second precision, such as milliseconds or microseconds. The timestamp filter used by the zoom feature truncates timestamp values to whole seconds, preventing accurate selection and zooming of high-resolution time series data.

Workaround:

Truncate timestamps to second-level resolution in the dataset before visualizing the data. Be aware that this workaround may introduce side effects:

Potential side effects of the workaround include:
  • Continuous variables may appear smoothed because multiple values within the same second can be aggregated.
  • Binary (0/1) variables may produce intermediate values that do not represent actual system behavior.
  • Events or alarms with a duration shorter than one second may be lost.
Versions affected:
Cloudera Data Visualization 8.0.7 - 8.1.4
Fixed in version:
N/A
Cloudera issue:
VIZ-4050
App-level filters override dashboard-level filters

When using applications in Cloudera Data Visualization, filters defined at the application level take precedence over filters configured at the dashboard level. This means that dashboard-level filter settings are overridden by the application’s filter configuration, which may lead to unexpected filtering behavior. .

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.7 - 8.1.4
Fixed in version:
N/A
Cloudera issue:
VIZ-4052
Issues when navigating between dashboards in applications

Several navigation and usability limitations exist when working with dashboards inside Cloudera Data Visualization applications:

  • Open in New Tab not working within apps:

    When using the Navigate to Dashboard action with Open Target Dashboard in New Tab enabled, the target dashboard opens in the same tab instead of a new tab if the dashboard is part of an application.

  • No back navigation between dashboards:

    When navigating between dashboards within an application, there is no built-in option to return to the previously viewed dashboard.

  • Dashboards cannot be hidden from the app menu:

    Dashboards that are only intended to be accessed through navigation links from other dashboards still appear in the application's top navigation menu.

  • Application-level filters cannot be hidden on individual dashboards:

    Filters scoped at the application level are displayed on all dashboards in the application. There is no option to hide these filters on dashboards where they are not relevant.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.7 - 8.1.4
Fixed in version:
N/A
Cloudera issue:
VIZ-4054