Creating updating deployments 0 10 18 58 596 | DEBUG | prefe Prefect Community #ask-marvin

Creating/updating deployments... ━━━━━━━━━━━━━━━━━...

pradana adnyana

02/26/2026, 3:23 AM

Creating/updating deployments... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0% - --101858.596 | DEBUG | prefect.client - Encountered retryable exception during request. Another attempt will be made in 4.31904511020901s. This is attempt 2/6. Traceback (most recent call last): File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 101, in map_httpcore_exceptions yield File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 394, in handle_async_request resp = await self._pool.handle_async_request(req) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 256, in handle_async_request raise exc from None File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 236, in handle_async_request response = await connection.handle_async_request( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pool_request.request ^^^^^^^^^^^^^^^^^^^^ ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection.py", line 103, in handle_async_request return await self._connection.handle_async_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 136, in handle_async_request raise exc File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 106, in handle_async_request ) = await self._receive_response_headers(**kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 177, in _receive_response_headers event = await self._receive_event(timeout=timeout) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 217, in _receive_event data = await self._network_stream.read( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ self.READ_NUM_BYTES, timeout=timeout ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_backends/anyio.py", line 32, in read with map_exceptions(exc_map): ~~~~~~~~~~~~~~^^^^^^^^^ File "/home/pradana/.local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/contextlib.py", line 162, in exit self.gen.throw(value) ~~~~~~~~~~~~~~^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_exceptions.py", line 14, in map_exceptions raise to_exc(exc) from exc httpcore.ReadError The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/prefect/client/base.py", line 271, in _send_with_retry response = await send(request, *send_args, **send_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1629, in send response = await self._send_handling_auth( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1657, in _send_handling_auth response = await self._send_handling_redirects( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...<3 lines>... ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1694, in _send_handling_redirects response = await self._send_single_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1730, in _send_single_request response = await transport.handle_async_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 393, in handle_async_request with map_httpcore_exceptions(): ~~~~~~~~~~~~~~~~~~~~~~~^^ File "/home/pradana/.local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/contextlib.py", line 162, in exit self.gen.throw(value) ~~~~~~~~~~~~~~^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 118, in map_httpcore_exceptions raise mapped_exc(message) from exc httpx.ReadError @Marvin why this error? How to solve it?

Marvin

02/26/2026, 3:23 AM

✅ thought for 249.6 seconds

Marvin

02/26/2026, 3:28 AM

Short answer: this is a transient network/connection issue while the Prefect CLI is talking to the API during deployment creation. Specifically,

httpx.ReadError

means the connection was established but the socket was closed or interrupted while reading the response headers/body (load balancer/proxy timeout, network blip, server restart, etc.). Prefect retries these automatically (as you can see from “attempt 2/6”), but if the interruption persists it will still fail. A few things to check and quick fixes: Ask first (so I can tailor the fix): - Are you deploying to Prefect Cloud or a self-hosted Prefect Server? - Your Prefect version (

prefect version

) and Python version (looks like 3.13 from the path)? - Are you behind a corporate proxy/VPN or load balancer? - Does it fail consistently or intermittently? Immediate mitigations - Increase the API request timeout (applies to connect/read/write/pool timeouts):

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export PREFECT_API_REQUEST_TIMEOUT=120
  # or persist it
  prefect config set api.request_timeout 120

- Let Prefect retry longer/more:

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export PREFECT_CLIENT_MAX_RETRIES=10
  # optional: add 500/504 to retryable codes if your gateway returns them
  export PREFECT_CLIENT_RETRY_EXTRA_CODES=500,504

- Re-run with debug to confirm which endpoint is failing:

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export PREFECT_LOGGING_LEVEL=DEBUG
  prefect deploy

Connectivity checks - Verify which API you’re hitting:

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prefect config view | sed -n '/\[api\]/,/^\[/p'

- Test health endpoint:

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echo "$PREFECT_API_URL"
/usr/bin/curl -v "$PREFECT_API_URL/health"

- Check for proxies that might be resetting idle/long-lived connections:

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env | egrep -i 'http.*_proxy|https.*_proxy'

If you’re on Prefect 3.x with Python 3.13 - Ensure you’re on a recent Prefect 3.x release. Newer versions include improved retry handling for `httpx`/`httpcore` errors. If you’re on an older 3.x, upgrade:

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pip install -U prefect

Then confirm:

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prefect version

If you’re self-hosting Prefect Server behind a proxy/load balancer - Check and increase upstream timeouts to avoid mid-read disconnects: - Nginx:

proxy_read_timeout

client_body_timeout

- ALB/ELB: idle timeout - Ingress:

<http://nginx.ingress.kubernetes.io/proxy-read-timeout|nginx.ingress.kubernetes.io/proxy-read-timeout>

- Review server logs at the time of the error for restarts or 5xx. - Ensure the server isn’t under heavy load (DB restarts, OOM, etc.). If you’re on Prefect Cloud - Verify workspace access with a quick API call:

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prefect cloud workspace ls

- Check for corporate firewall/VPN idle timeouts; try from a different network or temporarily disable VPN to confirm cause. Why this happens in deployments - The CLI makes API calls to create/update deployments; if the response takes longer or a proxy drops the connection mid-response,

httpx

raises

ReadError

. Prefect retries with exponential backoff, but persistent drops need higher timeouts or proxy/server tuning. If the issue persists after increasing

PREFECT_API_REQUEST_TIMEOUT

and

PREFECT_CLIENT_MAX_RETRIES

, please share: - Output of

prefect version

- Whether you’re on Cloud or OSS (and any proxy/LB in between) - A short snippet of the debug log around the failing request (the URL and status, if any) References: - Prefect docs: docs.prefect.io - Prefect repository: GitHub: PrefectHQ/prefect

pradana adnyana

02/26/2026, 4:27 AM

112545.024 | DEBUG | prefect.profiles - Using profile 'public' 2026-02-26 112545.369 | INFO | __main__<module>66 - Starting deployment with version: 25.02.2026 and branch: None 112545.371 | DEBUG | prefect.client - Connecting to API at http://******:4200/api/ 112545.470 | DEBUG | prefect.events.clients - Reconnecting websocket connection. 112545.470 | DEBUG | prefect.events.clients - Opening websocket connection. 2026-02-26 112545.476 | INFO | __main__main23 - GitHub credentials loaded: GitHubCredentials(token=SecretStr('**********')) 2026-02-26 112545.476 | INFO | __main__main24 - Deploying /home/pradana/projects/outlet-scrape/workflows/workflows 2026-02-26 112545.476 | INFO | __main__main26 - Starting deployment... 2026-02-26 112545.476 | INFO | __main__main27 - Deploying from GitHub repository: https://github.com/aidevakasha/outlet-scrape.git 112545.477 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Pulling contents from repository 'outlet-scrape' to '/tmp/tmp9krp_11k/outlet-scrape'... 112545.477 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Cloning repository https://github.com/aidevakasha/outlet-scrape.git 112545.554 | DEBUG | prefect.events.clients - Pinging to ensure websocket connected. 112545.635 | DEBUG | prefect.events.clients - Pong received. Websocket connected. 112545.635 | DEBUG | prefect.events.clients - Resending 0 unconfirmed events. 112545.636 | DEBUG | prefect.events.clients - Finished resending unconfirmed events. 112545.636 | DEBUG | prefect.client - Connecting to API at http://******:4200/api/ 112545.637 | DEBUG | prefect.events.clients - EventsClient(id=138704068446592): Emitting event id=019c9832-1703-7ae3-b09c-ea49139a63b6. 112545.637 | DEBUG | prefect.events.clients - Added event id=019c9832-1703-7ae3-b09c-ea49139a63b6 to unconfirmed events list. There are now 1 unconfirmed events. 112545.638 | DEBUG | prefect.events.clients - EventsClient(id=138704068446592): Emit reconnection attempt 0. 112545.638 | DEBUG | prefect.events.clients - EventsClient(id=138704068446592): Sending event id=019c9832-1703-7ae3-b09c-ea49139a63b6. 112545.638 | DEBUG | prefect.events.clients - EventsClient(id=138704068446592): Checkpointing event id=019c9832-1703-7ae3-b09c-ea49139a63b6. 112551.234 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Successfully checked out commit 877170f0148c1fc5124ff47c9e691832afb9aae2 112552.565 | DEBUG | prefect.client - Connecting to API at http://******:4200/api/ 112552.889 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Pulling contents from repository 'outlet-scrape' to '/tmp/tmp72nxupud/outlet-scrape'... 112552.890 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Cloning repository https://github.com/ 112556.697 | DEBUG | prefect.runner.storage.git-repository.outlet-scrape - Successfully checked out commit 877170f0148c1fc5124ff47c9e691832afb9aae2 112556.715 | DEBUG | prefect.client - Connecting to API at http://******:4200/api/ Creating/updating deployments... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0% - --112556.837 | DEBUG | prefect.client - Connecting to API at http://******:4200/api/ Creating/updating deployments... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0% - --112557.190 | DEBUG | prefect.client - Encountered retryable exception during request. Another attempt will be made in 2s. This is attempt 1/2. Traceback (most recent call last): File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 101, in map_httpcore_exceptions yield File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 394, in handle_async_request resp = await self._pool.handle_async_request(req) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 256, in handle_async_request raise exc from None File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 236, in handle_async_request response = await connection.handle_async_request( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pool_request.request ^^^^^^^^^^^^^^^^^^^^ ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/connection.py", line 103, in handle_async_request return await self._connection.handle_async_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 136, in handle_async_request raise exc File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 106, in handle_async_request ) = await self._receive_response_headers(**kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 177, in _receive_response_headers event = await self._receive_event(timeout=timeout) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_async/http11.py", line 217, in _receive_event data = await self._network_stream.read( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ self.READ_NUM_BYTES, timeout=timeout ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_backends/anyio.py", line 32, in read with map_exceptions(exc_map): ~~~~~~~~~~~~~~^^^^^^^^^ File "/home/pradana/.local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/contextlib.py", line 162, in exit self.gen.throw(value) ~~~~~~~~~~~~~~^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpcore/_exceptions.py", line 14, in map_exceptions raise to_exc(exc) from exc httpcore.ReadError The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/prefect/client/base.py", line 271, in _send_with_retry response = await send(request, *send_args, **send_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1629, in send response = await self._send_handling_auth( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...<4 lines>... ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1657, in _send_handling_auth response = await self._send_handling_redirects( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...<3 lines>... ) ^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1694, in _send_handling_redirects response = await self._send_single_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_client.py", line 1730, in _send_single_request response = await transport.handle_async_request(request) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 393, in handle_async_request with map_httpcore_exceptions(): ~~~~~~~~~~~~~~~~~~~~~~~^^ File "/home/pradana/.local/share/uv/python/cpython-3.13.11-linux-x86_64-gnu/lib/python3.13/contextlib.py", line 162, in exit self.gen.throw(value) ~~~~~~~~~~~~~~^^^^^^^ File "/home/pradana/projects/outlet-scrape/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 118, in map_httpcore_exceptions raise mapped_exc(message) from exc httpx.ReadError 2026-02-26 112559.514 | ERROR | __main__main54 - Deployment failed: @Marvin here prefect version 112727.428 | DEBUG | prefect.profiles - Using profile 'public' Version: 3.6.13 API version: 0.8.4 Python version: 3.13.11 Git commit: 9eb03a74 Built: Fri, Jan 23, 2026 03:49 AM OS/Arch: linux/x86_64 Profile: public Server type: server Pydantic version: 2.12.5 Server: Database: sqlite SQLite version: 3.50.4 Integrations: prefect-docker: 0.7.1 prefect-github: 0.4.0 prefect-email: 0.4.2

Marvin

02/26/2026, 4:27 AM

Your message was too long, here's your message at the allowed limit: 11 25 45 024 | DEBUG | prefect profiles - Using profile 'public' 2026-02-26 11 25 45 369 | INFO | main <module> 66 - Starting deployment with version 25 02 2026 and branch None 11 25 45 371 | DEBUG | prefect client - Connecting to API at http //*** 4200/api/ 11 25 45 470 | DEBUG | prefect events clients - Reconnecting websocket connection 11 25 45 470 | DEBUG | prefect events clients - Opening websocket connection 2026-02-26 11 25 45 476 | INFO | main main 23 - GitHub credentials loaded GitHubCredentials(token=SecretStr('*****')) 2026-02-26 11 25 45 476 | INFO | main main 24 - Deploying /home/pradana/projects/outlet-scrape/workflows/workflows 2026-02-26 11 25 45 476 | INFO | main main 26 - Starting deployment 2026-02-26 11 25 45 476 | INFO | main main 27 - Deploying from GitHub repository <https //github com/aidevakasha/outlet-scrape git> 11 25 45 477 | DEBUG | prefect runner storage git-repository outlet-scrape - Pulling contents from repository 'outlet-scrape' to '/tmp/tmp9krp_11k/outlet-scrape' 11 25 45 477 | DEBUG | prefect runner storage git-repository outlet-scrape - Cloning repository <https //github com/aidevakasha/outlet-scrape git> 11 25 45 554 | DEBUG | prefect events clients - Pinging to ensure websocket connected 11 25 45 635 | DEBUG | prefect events clients - Pong received Websocket connected 11 25 45 635 | DEBUG | prefect events clients - Resending 0 unconfirmed events 11 25 45 636 | DEBUG | prefect events clients - Finished resending unconfirmed events 11 25 45 636 | DEBUG | prefect client - Connecting to API at http //*** 4200/api/ 11 25 45 637 | DEBUG | prefect events clients - EventsClient(id=138704068446592) Emitting event id=019c9832-1703-7ae3-b09c-ea49139a63b6 11 25 45 637 | DEBUG | prefect events clients - Added event id=019c9832-1703-7ae3-b09c-ea49139a63b6 to unconfirmed events list There are now 1 unconfirmed events 11 25 45 638 | DEBUG | prefect events clients - EventsClient(id=138704068446592) Emit reconnection attempt 0 11 25 45 638 | DEBUG | prefect events clients - EventsClient(id=138704068446592) Sending event id=019c9832-1703-7ae3-b09c-ea49139a63b6 11 25 45 638 | DEBUG | prefect events clients - EventsClient(id=138704068446592) Checkpointing event id=019c9832-1703-7ae3-b09c-ea49139a63b6 11 25 51 234 | DEBUG | prefect runner storage git-repository outlet-scrape - Successfully checked out commit 877170f0148c1fc5124ff47c9e691832afb9aae2 11 25 52 565 | DEBUG | prefect client - Connecting to API at http //*** 4200/api/ 11 25 52 889 | DEBUG | prefect runner storage git-repository outlet-scrape - Pulling contents from repository 'outlet-scrape' to '/tmp/tmp72nxupud/outlet-scrape' 11 25 52 890 | DEBUG | prefect runner storage git-repository outlet-scrape - Cloning repository <https //github com/> 11 25 56 697 | DEBUG | prefect runner storage git-repository outlet-scrape - Successfully checked out commit 877170f0148c1fc5124ff47c9e691832afb9aae2 11 25 56 715 | DEBUG | prefect client - Connecting to API at http //*** 4200/api/ Creating/updating deployments ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0% - -- --11 25 56 837 | DEBUG | prefect client - Connecting to API at http //*** 4200/api/ Creating/updating deployments ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0% - -- --11 25 57 190 | DEBUG | prefect client - Encountered retryable exception during request Another attempt

pradana adnyana

02/26/2026, 4:29 AM

Marvin

02/26/2026, 4:29 AM

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