Cloudera Docs

Known issues and limitations in Cloudera Data Visualization 8.0.2

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 - 8.0.6
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 - 8.0.6
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 - 8.0.6
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 - 8.0.6
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
AI visual may fail with connection already closed after long uptime

In long-running Cloudera Data Visualization instances, the AI visual can sometimes fail with a connection already closed error due to stale database connections in background threads. This requires a service restart to recover and interrupts long-running AI visual usage.

Workaround:

Restart the Cloudera Data Visualization service if the error occurs.

Versions affected:
Cloudera Data Visualization 7.2.7 - 8.0.6
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3088
Filter search is disabled if a filter query fails during search

When searching for a value in a dimension filter, a query failure could result in the filter search not working.

Workaround:

Reload the page or select a filter value in another filter on the same page.

Versions affected:
Cloudera Data Visualization 8.0.0 - 8.0.2
Fixed in version:
N/A
Cloudera issue:
VIZ-3118
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
Improper handling of email address formats in Email modal

The Reply To and From fields in the Email modal did not correctly support email addresses in name <email@domain.com> and email@domain.com formats.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.2.7 - 8.0.4
Fixed in version:
Cloudera Data Visualization 8.0.5
Cloudera issue:
VIZ-3300
Unnecessary replacements of datasets and cloned dashboards during import

When importing a cloned dashboard, it is always marked for replacement in the target system, even if no changes were made there. The same behavior occurs with datasets, which are also flagged as needing replacement regardless of actual changes.

Workaround:

For cloned dashboards, set the parent_report_id property to null in the exported JSON file.

For datasets, replace the version_name with the same version_name in the target system.

Versions affected:
Cloudera Data Visualization 6.3.0 and higher
Fixed in version:
Cloudera Data Visualization 8.0.4
Cloudera issue:
VIZ-3345, VIZ 3347
Dashboard deletion may be slow after upgrading to Cloudera Data Visualization 8.0.2 and 8.0.3

You may experience delays (up to a minute) when deleting dashboards. After confirming deletion, the UI may appear unresponsive before completing the operation. This is caused by unoptimized query handling during the delete process.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.2 - 8.0.3
Fixed in version:
Cloudera Data Visualization 8.0.4
Cloudera issue:
VIZ-3359
Word cloud may not display East Asian characters correctly

Word cloud visuals may fail to render East Asian characters, such as Chinese, Japanese, or Korean, due to issues with SVG structure. This can result in missing or incorrectly displayed characters in the visualization.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.4 and lower
Fixed in version:
Cloudera Data Visualization 8.0.5
Cloudera issue:
VIZ-3377
PDF download options missing or causing errors in dashboards

You may experience issues with PDF export options in dashboards, which can impact your ability to export reports as intended.

The following options are missing from the Download as > PDF dropdown or may cause errors when selected:
  • Current sheet
  • One sheet per page
  • One visual per page on current sheet

When these options do appear (for example, in the app or email export modal), selecting One sheet per page or One visual per page on current sheet may result in an error. Due to these issues, the system defaults to exporting only the current sheet as a PDF, without the ability to change the setting.

Workaround:
None
Versions affected:
Cloudera Data Visualization 6.4.3 - 8.0.4
Fixed in version:
Cloudera Data Visualization 8.0.5
Cloudera issue:
VIZ-3391
Delete Usage Data modal does not appear in Site Settings

The Delete Usage Data modal does not appear in the Site Settings interface, preventing users from accessing this feature to manage usage data.

Workaround:
None
Versions affected:
Cloudera Data Visualization 7.2.7 - 8.0.4
Fixed in version:
Cloudera Data Visualization 8.0.5
Cloudera issue:
VIZ-3438
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 and higher
Fixed in version:
N/A
Cloudera issue:
VIZ-3481
Bulk-update refactor may cause performance degradation in Cloudera AI

In Cloudera AI environments, the bulk-update refactor for eventstracker may degrade performance.

Workaround:
Disable the feature flag enable_cml_usage_events.
Versions affected:
Cloudera Data Visualization 7.1.7 and higher
Fixed in version:
N/A
Cloudera issue:
VIZ-3505
Visual and dashboard downloads fail with special characters in titles

Downloading visuals or dashboards with titles containing special characters, spaces, or non-Latin scripts can produce files (PNG, PDF, CSV, Excel) with missing or invalid extensions. This can prevent files from opening in other applications.

Workaround:

Rename the visual or dashboard to remove special characters before downloading.

Versions affected:
Cloudera Data Visualization 8.0.6 and lower
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3509
Dashboard filters cannot be moved to the grid area

Dashboard-level filters cannot be moved to the grid area. Attempting to reposition filters fails, and selections can be lost, limiting dashboard interactivity and flexibility in filter management.

Workaround:
None
Versions affected:
Cloudera Data Visualization 8.0.0 - 8.0.6
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3533
Cloudera AI login fails if required user groups are missing

You can encounter server errors (HTTP 500) and be unable to log in to Cloudera Data Visualization if required Cloudera AI user groups are not automatically created. This issue can prevent access until groups are manually created.

Workaround:

Manually create the required Cloudera AIuser groups with the name “vizcml-rw” and “vizcml-ro” as the vizapps_admin user before logging in using SSO.

Versions affected:
Cloudera Data Visualization 8.0.6 and lower
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3546
Upgrade failures when migrating from 7.2.6 to 7.2.9 and higher

Upgrading Cloudera Data Visualization directly from version 7.2.6 to 7.2.9 or higher can result in a broken database due to a migration issue in the datasets application. This affects both standalone and embedded Data tab deployments, potentially causing upgrade failures or application errors.

Workaround:

Perform a multi-step upgrade through an intermediate version lower than 7.2.9 to avoid the migration issue. On the Data tab, pin the versions using the EMBEDDED_CDV_IMAGE environment variable to pin the application to a specific runtime Docker image. For applications already impacted, run the following script: https://github.com/cloudera/Cloudera-TSB/tree/main/TSB-907

Versions affected:
Cloudera Data Visualization 8.0.6 and lower
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3548
Misapplied selections in dropdown filters with duplicate values

When the same value appears in multiple dropdown filters on a dashboard, selecting a value by clicking on the label in one filter may incorrectly apply the selection to a different filter. This behavior can lead to confusion and inaccurate filter configurations.

Workaround:

Select values using the checkbox instead of clicking the label when multiple dropdown filters contain the same value.

Versions affected:
Cloudera Data Visualization 8.0.6 and lower
Fixed in version:
Cloudera Data Visualization 8.0.7
Cloudera issue:
VIZ-3550