Fix Supervisor crash in Stackdriver remote log IO

[23tae]

This PR prevents the Airflow 3 Supervisor process from crashing entirely when transient network or IAM errors occur during Stackdriver log transmission.

Description

This PR addresses Bug 3 described in #68240.

In the new Airflow 3 Task SDK architecture, the StackdriverRemoteLogIO handler runs within the Supervisor process rather than the task process itself. If an exception is raised during _transport.send(), it propagates upwards and crashes the entire Supervisor process, disrupting task monitoring.

Key changes

• Exception Handling: Wrapped the _transport.send() call in a try...except Exception block. When a transmission fails, the exception is safely caught, and a warning is logged using the internal _logger. This ensures the Supervisor process remains highly resilient.

Verification Results

I have verified the changes using prek and breeze.

• Static Checks (Prek): Passed
• Unit Tests (Breeze): Passed

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related: #68240

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Was generative AI tooling used to co-author this PR?

• Yes

Generated-by: Antigravity following the guidelines

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• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

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Note

✅ Ready for review · @23tae → @potiuk · 2026-06-12 13:30 UTC

Thanks @23tae — all checks are green and this PR is marked ready for maintainer review. The ball is with the maintainers now; a maintainer will take the next look.

_{Automated triage — may be imperfect.}

[shahar1]

Please resolve conflicts

[23tae]

@shahar1 Conflicts resolved. Thanks!

[eladkal]

Does this PR solve #68240 ?

[23tae]

@eladkal No, this PR only fixes Bug 3 of #68240.

The other bugs are addressed in the PRs below:

• Bug 1: Fix empty labels in Stackdriver log IO for Airflow 3 Supervisor #68292
• Bug 2: Fix Stackdriver log read filter to use task_instance_id with backward compatibility #68293

[23tae]

Putting this on hold — the try-except guard here may only be effective for SyncTransport users, not the default BackgroundThreadTransport. Waiting for the stack trace from the issue author to confirm (#68240 (comment)).