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# ask-marvins
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10/10/2025, 11:00 AMThis message was deleted.
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Marvin
10/10/2025, 11:00 AMYour message was too long, here's your message at the allowed limit:
In recent Prefect versions when I have a worker of type process and I run a flow and delete it from the UI while it's running the worker crashes I'm running Prefect in a self-hosted version with Docker compose The error I get is the following
axiom-prefect-process-worker | 10 30 56 782 | INFO | prefect flow_runs runner - Process for flow run 'psi-nitta-reach' exited cleanlyaxiom-prefect-process-worker | + Exception Group Traceback (most recent call last)axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/cli/_utilities py line 44 in wrapperaxiom-prefect-process-worker | | return fn(*args *kwargs)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/cli/_types py line 156 in sync_fnaxiom-prefect-process-worker | | return asyncio run(async_fn(*args *kwargs))axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /usr/local/lib/python3 12/asyncio/runners py line 195 in runaxiom-prefect-process-worker | | return runner run(main)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /usr/local/lib/python3 12/asyncio/runners py line 118 in runaxiom-prefect-process-worker | | return self _loop run_until_complete(task)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /usr/local/lib/python3 12/asyncio/base_events py line 691 in run_until_completeaxiom-prefect-process-worker | | return future result()axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/cli/worker py line 168 in startaxiom-prefect-process-worker | | await worker start(axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/workers/process py line 158 in startaxiom-prefect-process-worker | | async with self as workeraxiom-prefect-process-worker | | ^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/workers/process py line 307 in __aexit__axiom-prefect-process-worker | | await super() __aexit__(*exc_info)axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/workers/base py line 1568 in __aexit__axiom-prefect-process-worker | | raise exceptions[0] from Noneaxiom-prefect-process-worker | | File /usr/local/lib/python3 12/contextlib py line 737 in __aexit__axiom-prefect-process-worker | | cb_suppress = await cb(*exc_details)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/runner/runner py line 1536 in __aexit__axiom-prefect-process-worker | | await self _exit_stack __aexit__(*exc_info)axiom-prefect-process-worker | | File /usr/local/lib/python3 12/contextlib py line 754 in __aexit__axiom-prefect-process-worker | | raise exc_details[1]axiom-prefect-process-worker | | File /usr/local/lib/python3 12/contextlib py line 737 in __aexit__axiom-prefect-process-worker | | cb_suppress = await cb(*exc_details)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/anyio/_backends/_asyncio py line 781 in __aexit__axiom-prefect-process-worker | | raise BaseExceptionGroup(axiom-prefect-process-worker | | ExceptionGroup unhandled errors in a TaskGroup (1 sub-exception)axiom-prefect-process-worker | +-+---------------- 1 ----------------axiom-prefect-process-worker | | Traceback (most recent call last)axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/client/orchestration/_flow_runs/client py line 716 in read_flow_runMarvin
10/10/2025, 11:00 AMit self request(`
axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/client/orchestration/base py line 53 in requestaxiom-prefect-process-worker | | return await self _client send(request)axiom-prefect-process-worker | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/client/base py line 379 in sendaxiom-prefect-process-worker | | response raise_for_status()axiom-prefect-process-worker | | File /app/ venv/lib/python3 12/site-packages/prefect/client/base py line 163 in raise_for_statusaxiom-prefect-process-worker | | raise PrefectHTTPStatusError from_httpx_error(exc) from exc __cause__axiom-prefect-process-worker | | prefect exceptions PrefectHTTPStatusError Client error '404 Not Found' for url '<http //axiom-orchestrator 4200/api/flow_runs/a4288034-6783-441f-8100-e40322bee41c>'axiom-prefect-process-worker | | Response {'detail' 'Flow run not found'}