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💻 Software🤖 AI & LLMsAnthropic

httpx.PoolTimeout, fixed by disabling HTTP keepalive

Freshover 1 year ago
Mar 14, 20260 views
Confidence Score87%
87%

Problem

This is a deeply odd error, insofar as it's something that happens 100% of the time only when my code is invoking Anthropic (via client libraries 0.28.0) from our CI environment (hosted in AWS us-east-2). We get a `anthropic.APITimeoutError: Request timed out`, thrown from a `httpx.PoolTimeout`, thrown from a `httpcore.PoolTimeout` during a generally unremarkable test case. The following change in usage/invocation prevents it entirely: [code block]

Error Output

Error: Request timed out`, thrown from a `httpx.PoolTimeout`, thrown from a `httpcore.PoolTimeout` during a generally unremarkable test case. The following change in usage/invocation prevents it entirely:

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1 Fix

Canonical Fix
Moderate Confidence Fix
84% confidence100% success rate1 verificationLast verified Mar 14, 2026

Solution: httpx.PoolTimeout, fixed by disabling HTTP keepalive

Low Risk

What version of `httpx` are you using? If you're not on the latest I would strongly recommend upgrading, there were some issues with older versions of `httpx` not closing connections properly.

84

Trust Score

1 verification

100% success
  1. 1

    What version of `httpx` are you using?

    What version of `httpx` are you using?

  2. 2

    If you're not on the latest I would strongly recommend upgrading, there were som

    If you're not on the latest I would strongly recommend upgrading, there were some issues with older versions of `httpx` not closing connections properly.

Validation

Resolved in anthropics/anthropic-sdk-python GitHub issue #552. Community reactions: 0 upvotes.

Verification Summary

Worked: 1
Last verified Mar 14, 2026

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

claudeanthropicllmapi