PYTHON-1354: do not set timeout to None when calling execute_async in execute_concurrent

[mykaul]

Summary

• Cherry-pick of apache/cassandra-python-driver@d0407ea0.
• _ConcurrentExecutor._execute hardcoded timeout=None when calling execute_async, which disables the per-request timeout entirely instead of falling back to the request_timeout configured on the execution profile. This silently changes the timeout behavior for anyone using execute_concurrent/execute_concurrent_with_args.
• Removes the timeout=None override so the execution profile's request_timeout is honored, matching the documented behavior of execute_async.

Test plan

• Cherry-picked onto current master (conflicted with the local synchronous-errback recursion guard in cassandra/concurrent.py; resolved by keeping the local recursion-guard structure and only removing the timeout=None argument)
• tests/unit/test_concurrent.py — 10/10 passed
• tests/unit (excluding unrelated cython/column_encryption import errors caused by missing optional deps in this sandbox) — 749 passed, 40 skipped

[coderabbitai]

📝 Walkthrough

Walkthrough

_ConcurrentExecutor._execute no longer passes timeout=None to session.execute_async. It continues to pass the statement, parameters, and execution profile.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: removing the timeout=None argument from execute_async in execute_concurrent.
Description check	✅ Passed	The description explains the change, its reason, the cherry-pick resolution, and test results with relevant caveats.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Note

Quiet mode is enabled, so only the most important comments were posted inline. Other review comments are grouped below.

🟡 Other comments (1)

cassandra/concurrent.py-146-146 (1)

146-146: 📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Add a regression test for the timeout behavior.

Add a test that configures request_timeout and verifies that concurrent execution uses it. Also verify that explicitly passing timeout=None still disables timeouts.

As per coding guidelines: “Add relevant tests for new features and bug fixes.”

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@cassandra/concurrent.py` at line 146, Add regression coverage for the
concurrent execution path around session.execute_async, configuring
request_timeout and asserting it is used when no per-call timeout is supplied.
Also assert that explicitly passing timeout=None disables the configured
timeout, preserving the existing override behavior.

Source: Coding guidelines

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Other comments:
In `@cassandra/concurrent.py`:
- Line 146: Add regression coverage for the concurrent execution path around
session.execute_async, configuring request_timeout and asserting it is used when
no per-call timeout is supplied. Also assert that explicitly passing
timeout=None disables the configured timeout, preserving the existing override
behavior.

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ℹ️ Review info

⚙️ Run configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 1d7e601 and 637837d.

📒 Files selected for processing (1)

• cassandra/concurrent.py