Unable to access Data Warehouse: MwcTokenValidationException

[MOVC]

For the past two days I have been unable to access tables in existing data warehouses, through both the service and connecting to them. If I run a query against a table, it takes almost two hours before failing out with the error message:

"Unable to preview the data: Unable to execute the SQL request. Internal error "MwcTokenValidationException."

This also causes any pipelines pointing at warehouses to fail. It affects the two Warehouses I have in the same way and they're both in separate, Premium capacity workspaces.

I have had intermittent problems with connecting to Warehouses before but they have always been short lived (and because of this I haven't been able to retrieve the error message above before), this time it doesn't appear to be resolving.

[MOVC · Accepted solution]

This was a Microsoft side issue:

Root Cause

There was a known issue which caused the Distributed Query Processor (DQP) to be stuck and stop functioning during activation. This caused the data warehouse to be inaccessible.

Mitigation

To resolve the issue, the Backend Escalation Resources applied a fix and this action allowed the DQP to function correctly which in turn resumed all your data warehouse operations successfully.

Resolved after contacting support.

[v-huijiey-msft]

Hi @MOVC ,

It looks like you have found a solution. Could you please mark this helpful post as “Answered”?

This will help others in the community to easily find a solution if they are experiencing the same problem as you.

Thank you for your cooperation!

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

[v-huijiey-msft]

Hi @MOVC ,

Thanks for the reply from @AndyDDC .

This error usually indicates a problem with token validation, which may be related to authentication or authorization issues.

Make sure your authentication token has not expired. Sometimes, refreshing or redoing your authentication can resolve token-related issues.

Can you tell me your region?

I saw a case with you with the same issue and they resolved the issue autonomously behind them. So it may have to wait a few days.

Solved: XMLA fail to connect suddenly - Page 2 - Microsoft Fabric Community

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

[MOVC]

Thank you for the reply, I have a ticket in with Microsoft support who are currently looking at the issue. We are UK South.

How would I go about refreshing the token from my end? It seems like whenever this issue occurs for other people it just goes away after a few days. I think we're 5/6 days in now.

[v-huijiey-msft]

Hi @MOVC ,

If you want to refresh the token, just clear the browser cache and refresh the browser.

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

[MOVC]

Did not work unfortunately.

[AndyDDC]

With any error messages, it's always worth raising a support request to Microsoft so they can take a look.  From the ? (Help and Support) in the main Navigation bar.