topic Re: Databricks clusters unresponsive in Data Engineering

Databricks clusters unresponsive

mosayed — Thu, 11 Sep 2025 13:35:47 GMT

Hello everyone,

we are experiencing issues on one of our Databricks workspaces:

Notebooks and SQL queries are executing, but results are not returned to the UI.
On the screenshots you can see examples where cells in notebooks and queries in a SQL warehouse are executed successfully (clusters respond, rows are read), but the response with the data never comes back.
The UI stays stuck on "Fetching results”.
Sometimes a timeout error appears (Server error: Timed out after 60 seconds waiting for lazyLoadNotebookIfNeeded).
We also checked the browser developer tools: the requests are answered with HTTP 204 No Content.

This looks like one-directional communication: commands can be sent to clusters, but no data is received back in the workspace UI.

Has anyone else experienced this issue recently, and is there a known workaround?

Thanks in advance!

Re: Databricks clusters unresponsive

Khaja_Zaffer — Thu, 11 Sep 2025 16:57:00 GMT

Hello @mosayed

Is it possible for you to share driver logs plus

Can you change the default time out to 300 seconds

Re: Databricks clusters unresponsive

nayan_wylde — Thu, 11 Sep 2025 17:15:39 GMT

Can you please check if the query is in finished status and what is the time the result was returned to client.

Re: Databricks clusters unresponsive

mosayed — Fri, 12 Sep 2025 08:40:27 GMT

Thanks a lot for the quick replies!

It seems the issue was related to a faulty iPython version (or something similar inside the workspace). The problem resolved itself later the same day in the evening, and everything is working normally again now.

Re: Databricks clusters unresponsive

szymon_dybczak — Fri, 12 Sep 2025 09:12:48 GMT

Thanks for letting us know @mosayed , could you mark your post as an answer? This help others with similar question locate solution for their problem faster.