Apologies if I ve missed this somewhere obvious quite likely

Question

Apologies if I ve missed this somewhere obvious quite likely but is it not possible to cancel a flow run from the 2 0 UI

Khuyen Tran · Answer

There is no current way to do it besides deleting the flow run We are working on adding Cancel to a flow run

David Elliott · Answer

OK thanks

David Elliott · Answer

Don t suppose there s any very rough timeline for that is there Atm deleting a flow run in the UI causes the flow run to crash out non gracefully and I was hoping to be able to add some logic for when the run gets cancelled which requires it to return cancelled gracefully I guess I could presumably cancel it via the CLI or API but just wondering if there s any expectation on that UI functionality

Zanie · Answer

There is a rough timeline actually we plan to add this in the next month We do not check for cancellation at this time in the engine so if you change the flow run s state to Cancelled nothing will happen unless it attempts to perform a state transition i e if you do it before it is Running it will not run but otherwise it will not see it has been cancelled until it is finished

Zanie · Answer

There s a rough sketch of within flow monitoring for its own cancellation in <https github com PrefectHQ prefect pull 7150> but we re still designing this feature

David Elliott · Answer

Ah that s good to know thanks re flow states OK cool thanks for the update +1