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aiohttp New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection (Fix)

Fixed
Spec
Package
aiohttp
Python
3.11
Verdict
Status
Fixed
Safe for prod
No
Risk
Medium
Last verified
2026-02-09
Own content ratio
0.44
#11113 ai auth caching llm security timeouts Idempotency Violation Updated: 2026-02-13
Issue #11113

The Fix

Downgrades the logging level for connector close errors from ERROR to DEBUG, as these are expected behavior with TLS 1.3 connections.

Based on closed aio-libs/aiohttp issue #11113 · PR/commit linked

Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.

Jump to Verify Open PR/Commit
@@ -0,0 +1 @@ @@ -0,0 +1 @@ +11148.feature.rst \ No newline at end of file diff --git a/CHANGES/11148.feature.rst b/CHANGES/11148.feature.rst
repro.py
Logs: [START] Security scan [DONE] Security scan ## ComfyUI-Manager: installing dependencies done. ** ComfyUI startup time: 2025-05-31 17:06:26.459 ** Platform: Linux ** Python version: 3.11.12 | packaged by conda-forge | (main, Apr 10 2025, 22:23:25) [GCC 13.3.0] ** Python executable: /opt/conda/bin/python ** ComfyUI Path: /app/ComfyUI ** ComfyUI Base Folder Path: /app/ComfyUI ** User directory: /app/ComfyUI/user ** ComfyUI-Manager config path: /app/ComfyUI/user/default/ComfyUI-Manager/config.ini ** Log path: /app/ComfyUI/user/comfyui.log WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager, possibly rendering your system unusable. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv. Use the --root-user-action option if you know what you are doing and want to suppress this warning. [ComfyUI-Manager] 'numpy' dependency were fixed Prestartup times for custom nodes:   13.5 seconds: /app/ComfyUI/custom_nodes/ComfyUI-Manager Checkpoint files will always be loaded safely. Total VRAM 7841 MB, total RAM 7640 MB pytorch version: 2.7.0+cu128 Set vram state to: NORMAL_VRAM Device: cuda:0 NVIDIA GeForce RTX 3060 Ti : cudaMallocAsync Using pytorch attention Python version: 3.11.12 | packaged by conda-forge | (main, Apr 10 2025, 22:23:25) [GCC 13.3.0] ComfyUI version: 0.3.39 ComfyUI frontend version: 1.20.7 [Prompt Server] web root: /opt/conda/lib/python3.11/site-packages/comfyui_frontend_package/static ### Loading: ComfyUI-Manager (V3.32.5) [ComfyUI-Manager] network_mode: public ### ComfyUI Revision: UNKNOWN (The currently installed ComfyUI is not a Git repository) Import times for custom nodes:    0.0 seconds: /app/ComfyUI/custom_nodes/websocket_image_save.py    0.1 seconds: /app/ComfyUI/custom_nodes/ComfyUI-Manager Starting server To see the GUI go to: http://0.0.0.0:8188 Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/alter-list.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/model-list.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/github-stats.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/extension-node-map.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json FETCH ComfyRegistry Data: 5/87 FETCH ComfyRegistry Data: 10/87 FETCH ComfyRegistry Data: 15/87 FETCH ComfyRegistry Data: 20/87 FETCH ComfyRegistry Data: 25/87 FETCH ComfyRegistry Data: 30/87 FETCH ComfyRegistry Data: 35/87 FETCH ComfyRegistry Data: 40/87 FETCH ComfyRegistry Data: 45/87 FETCH ComfyRegistry Data: 50/87 FETCH ComfyRegistry Data: 55/87 FETCH ComfyRegistry Data: 60/87 FETCH ComfyRegistry Data: 65/87 FETCH ComfyRegistry Data: 70/87 FETCH ComfyRegistry Data: 75/87 FETCH ComfyRegistry Data: 80/87 FETCH ComfyRegistry Data: 85/87 FETCH ComfyRegistry Data [DONE] [ComfyUI ... (truncated) ...
verify
Re-run the minimal reproduction on your broken version, then apply the fix and re-run.
fix.md
Option A — Apply the official fix\nDowngrades the logging level for connector close errors from ERROR to DEBUG, as these are expected behavior with TLS 1.3 connections.\nWhen NOT to use: This fix is not suitable for environments that require immediate SSL shutdown without logging.\n\n

Why This Fix Works in Production

  • Trigger: New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection lost: SSL shutdown timed out' error
  • Mechanism: The new ssl_shutdown_timeout parameter causes unnecessary logging errors during SSL connection closure
Production impact:
  • If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.

Why This Breaks in Prod

  • Shows up under Python 3.11 in real deployments (not just unit tests).
  • The new ssl_shutdown_timeout parameter causes unnecessary logging errors during SSL connection closure
  • Production symptom (often without a traceback): New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection lost: SSL shutdown timed out' error

Proof / Evidence

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub
“Or just have a condition when the value is 0?”
@Dreamsorcerer · 2025-06-04 · source
“It's not the new option that's triggering the logging, it's actually the back port of the connection close wait”
@bdraco · 2025-06-02 · source
“@bdraco can we define a new logger for connector or use exists logger from https://github.com/aio-libs/aiohttp/blob/21d640dc4b046be18bcb42aad8fa5445198fd219/aiohttp/log.py#L4 because now message is printed with root logger.”
@x0day · 2025-06-02 · source
“It is a bit strange that the original PR used the logger directly.”
@bdraco · 2025-06-02 · source

Failure Signature (Search String)

  • New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection lost: SSL shutdown timed out' error
  • New feature "ssl_shutdown_timeout" parameter makes a lot of systems report unnecessary error.
Copy-friendly signature
signature.txt
Failure Signature ----------------- New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection lost: SSL shutdown timed out' error New feature "ssl_shutdown_timeout" parameter makes a lot of systems report unnecessary error.

Error Message

Signature-only (no traceback captured)
error.txt
Error Message ------------- New feature "ssl_shutdown_timeout" parameter makes system report unnecessary 'Connection lost: SSL shutdown timed out' error New feature "ssl_shutdown_timeout" parameter makes a lot of systems report unnecessary error.

Minimal Reproduction

repro.py
Logs: [START] Security scan [DONE] Security scan ## ComfyUI-Manager: installing dependencies done. ** ComfyUI startup time: 2025-05-31 17:06:26.459 ** Platform: Linux ** Python version: 3.11.12 | packaged by conda-forge | (main, Apr 10 2025, 22:23:25) [GCC 13.3.0] ** Python executable: /opt/conda/bin/python ** ComfyUI Path: /app/ComfyUI ** ComfyUI Base Folder Path: /app/ComfyUI ** User directory: /app/ComfyUI/user ** ComfyUI-Manager config path: /app/ComfyUI/user/default/ComfyUI-Manager/config.ini ** Log path: /app/ComfyUI/user/comfyui.log WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager, possibly rendering your system unusable. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv. Use the --root-user-action option if you know what you are doing and want to suppress this warning. [ComfyUI-Manager] 'numpy' dependency were fixed Prestartup times for custom nodes:   13.5 seconds: /app/ComfyUI/custom_nodes/ComfyUI-Manager Checkpoint files will always be loaded safely. Total VRAM 7841 MB, total RAM 7640 MB pytorch version: 2.7.0+cu128 Set vram state to: NORMAL_VRAM Device: cuda:0 NVIDIA GeForce RTX 3060 Ti : cudaMallocAsync Using pytorch attention Python version: 3.11.12 | packaged by conda-forge | (main, Apr 10 2025, 22:23:25) [GCC 13.3.0] ComfyUI version: 0.3.39 ComfyUI frontend version: 1.20.7 [Prompt Server] web root: /opt/conda/lib/python3.11/site-packages/comfyui_frontend_package/static ### Loading: ComfyUI-Manager (V3.32.5) [ComfyUI-Manager] network_mode: public ### ComfyUI Revision: UNKNOWN (The currently installed ComfyUI is not a Git repository) Import times for custom nodes:    0.0 seconds: /app/ComfyUI/custom_nodes/websocket_image_save.py    0.1 seconds: /app/ComfyUI/custom_nodes/ComfyUI-Manager Starting server To see the GUI go to: http://0.0.0.0:8188 Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/alter-list.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/model-list.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/github-stats.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/extension-node-map.json Error while closing connector: ClientConnectionError('Connection lost: SSL shutdown timed out') [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json FETCH ComfyRegistry Data: 5/87 FETCH ComfyRegistry Data: 10/87 FETCH ComfyRegistry Data: 15/87 FETCH ComfyRegistry Data: 20/87 FETCH ComfyRegistry Data: 25/87 FETCH ComfyRegistry Data: 30/87 FETCH ComfyRegistry Data: 35/87 FETCH ComfyRegistry Data: 40/87 FETCH ComfyRegistry Data: 45/87 FETCH ComfyRegistry Data: 50/87 FETCH ComfyRegistry Data: 55/87 FETCH ComfyRegistry Data: 60/87 FETCH ComfyRegistry Data: 65/87 FETCH ComfyRegistry Data: 70/87 FETCH ComfyRegistry Data: 75/87 FETCH ComfyRegistry Data: 80/87 FETCH ComfyRegistry Data: 85/87 FETCH ComfyRegistry Data [DONE] [ComfyUI ... (truncated) ...

Environment

  • Python: 3.11

What Broke

Systems report excessive 'Connection lost: SSL shutdown timed out' errors during shutdown.

Why It Broke

The new ssl_shutdown_timeout parameter causes unnecessary logging errors during SSL connection closure

Fix Options (Details)

Option A — Apply the official fix

Downgrades the logging level for connector close errors from ERROR to DEBUG, as these are expected behavior with TLS 1.3 connections.

When NOT to use: This fix is not suitable for environments that require immediate SSL shutdown without logging.

Fix reference: https://github.com/aio-libs/aiohttp/pull/11148

Last verified: 2026-02-09. Validate in your environment.

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When NOT to Use This Fix

  • This fix is not suitable for environments that require immediate SSL shutdown without logging.

Verify Fix

verify
Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

  • Make timeouts explicit and test them (unit + integration) to avoid silent behavior changes.
  • Instrument retries (attempt count + reason) and alert on spikes to catch dependency slowdowns.

Version Compatibility Table

VersionStatus
2.7.0 Broken

Related Issues

No related fixes found.

Cluster: aiohttp:configuration-error All hubs All clusters
Related clusters: Data consistency Race condition Auth

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

Source & Disclaimer: Analysis derived from GitHub Issue #11113. Not affiliated with the library maintainers. Verify before production use.