Filter out empty logs in useLogs

[guan404ming]

Related Issue

• closes Minified React error 185 on the dag Overview page #52916
• closes UI crashes when filtering logs by log level #54157

Why

We filtered the logs by level by replacing them with empty strings, but they still remain in the log list.

airflow/airflow-core/src/airflow/ui/src/components/renderStructuredLog.tsx

Lines 117 to 123 in 33658f0

	if (
	logLevelFilters !== undefined &&
	Boolean(logLevelFilters.length) &&
	((typeof level === "string" && !logLevelFilters.includes(level)) || !Boolean(level))
	) {
	return "";
	}

On the overview page, multiple TaskLogPreview instances could exist at the same time, each holding a full list of logs. This overloads the virtual lists with state updates, eventually triggering the error: Error: Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate.

How

• filtered out empty log in TaskLogPreview

before

Screen.Recording.2025-08-13.at.8.46.35.PM.mov

after

Screen.Recording.2025-08-13.at.8.44.55.PM.mov

---

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[prdai]

is there a reason why we are getting empty logs? (i am not that familiar with the UI side of things, sorry if this is a obvious question)

[guan404ming]

After investigation, the issue would occur in sourceFilter and levelFilter as well. So I update the fix into useLogs, which would be used every components related logs.

is there a reason why we are getting empty logs? (i am not that familiar with the UI side of things, sorry if this is a obvious question)

We use renderStructuredLog to render log in UI and we pass the filter like sourceFilter and levelFilter to filter log by making it a empty string. But in current implementation, we didn't filter out the empty log causing the virtual list measurement element re-render in multiple times, which leads to the error 185.

[github-actions]

Backport failed to create: v3-0-test. View the failure log Run details

Status	Branch	Result
❌	v3-0-test

You can attempt to backport this manually by running:

cherry_picker a3388cf v3-0-test

This should apply the commit to the v3-0-test branch and leave the commit in conflict state marking
the files that need manual conflict resolution.

After you have resolved the conflicts, you can continue the backport process by running:

cherry_picker --continue

[pierrejeambrun]

cc: @bbovenzi not sure if we're going to have a 3.0.6 or 3.1.0 but we should probably manually backport this, just in case

[bbovenzi]

Manual backport: #54628