Mission Control 'Action' Column Errors, View Malfunctions, and Formatting Issues After Upgrading to Splunk Enterprise Security 8.2.x

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Updated:October 1, 2026
Document ID:SPLK052403

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Applicability

Splunk Mission Control Splunk Enterprise Security 8.2.x Splunk Cloud Splunk Enterprise

Description

Upgrading Splunk Enterprise Security (ES) to a new version, such as 8.2.x, requires careful post-upgrade validation to confirm that all components are functioning as expected and that the security posture remains robust. This includes verifying data ingestion, search execution, dashboard functionality, and overall system health. Adhering to these best practices minimizes potential disruptions and ensures the continued effectiveness of your security operations center (SOC). 
 
Following an upgrade to Splunk Enterprise Security (ES) 8.2.x, the Mission Control page may exhibit several display and functionality problems. These issues manifest as:
  1. ) Custom views or the "reset" view not applying changes.
  2. ) The "Action" column displaying an error message for all alarms, such as: 
    An Error occurred notable event-id=....

    or

    Something went wrong
  3. ) Selecting an alarm results in a blank screen or "An error occurred" and/or "something went wrong" message displayed in red, preventing access to alarm details.
  4. ) Various formatting discrepancies, including fields retaining old values (e.g., "Type" still showing), fields displaying underscores, or the "Status" column lacking a dropdown menu. 
  5. ) (Note: Issues with search functionality not matching alarm titles are considered a separate problem and are not addressed in this article's resolution.)

Investigation

To confirm the presence of this issue, navigate to the Mission Control page after a Splunk Enterprise Security (ES) 8.2.x upgrade. Observe the "Action" column for the error message mentioned above and attempt to use custom or reset views, noting if they fail to apply. Additionally, try selecting an alarm to see if its details load correctly or if an error is displayed. 

Resolution

The display and view issues in Mission Control after a Splunk Platform 8.2.x upgrade can often be resolved by clearing the browser cache or using an incognito/private browsing window.

1.) Clear Browser Cache / Use Incognito Mode:

    1. Close all browser tabs related to Splunk.
    2. Clear your web browser's cache and cookies. The exact steps vary by browser:
      • Chrome: Go to Settings > Privacy and security > Clear browsing data, select "Cached images and files" and "Cookies and other site data," then click "Clear data."
      • Firefox: Go to Options > Privacy & Security > Cookies and Site Data, then click "Clear Data..." and select "Cached Web Content."
      • Edge: Go to Settings > Privacy, search, and services > Clear browsing data, select "Cached images and files" and "Cookies and other site data," then click "Clear now."
    3. Alternatively, open a new incognito (Chrome/Edge) or private (Firefox) browsing window, navigate to your Splunk instance, and log in. This mode typically bypasses cached data and cookies, providing a clean session.

Restart your browser (if clearing cache) and log back into Splunk Mission Control. This step often resolves JavaScript errors or "Something went wrong" messages.

2.) Reset Mission Control Table Columns:

      • Navigate to the Mission Control page.
      • Locate the Gear icon (settings) within the table view.
      • Select Reset table settings.
      • Click Apply.
      • Click Save view.

         

After performing either of these steps, the "Action" column errors should be resolved, and the custom/reset views should function correctly.

If problems persist, review the release notes, fixed issues, known issues, limitations, and compatibility matrix for ES 8.2.x to ensure your environment meets all requirements and to identify any known behaviors. 


Revision History

Revision Publish Date Comments
1.0
01-Oct-2026
Initial Release

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