Fix group mode to aggregate "Additional runs" as "Unassigned" group in charts by Copilot · Pull Request #21155 · mlflow/mlflow

Copilot · 2026-02-26T08:59:49Z

In group mode, runs lacking the grouping attribute were placed in an "Additional runs" table group but rendered as individual traces in charts — inconsistent with how proper groups display as aggregated traces. This PR aggregates those runs into a single "Unassigned" group trace in all charts.

Changes

RunsCompare.tsx: Remove the isRemainingRunsGroup exclusion filter and the individual-run fallback mapping. All group headers (including the remaining runs group) are now passed through createGroupDataTrace, so their metrics are aggregated uniformly.
experimentPage.group-row-utils.ts: getRunGroupDisplayName now returns "Unassigned" for remaining-runs groups instead of "", giving the chart legend/tooltip a meaningful label.
RunsCompare.test.tsx: Updated the mixed groups/ungrouped test to include the remaining runs group header in comparedRuns, matching the actual production data shape (the group header always accompanies its member runs).
experimentPage.group-row-utils.test.ts: Updated display name assertions from "" → "Unassigned".

How is this PR tested?

Existing unit/integration tests
New unit/integration tests

Does this PR require documentation update?

No. You can skip the rest of this section.

Does this PR require updating the MLflow Skills repository?

No. You can skip the rest of this section.

Release Notes

Is this a user-facing change?

Yes. Give a description of this change to be included in the release notes for MLflow users.

When grouping runs by a parameter/tag, runs without that attribute are now shown as a single aggregated "Unassigned" group trace in metric charts instead of individual per-run traces, consistent with how named groups are displayed.

What component(s), interfaces, languages, and integrations does this PR affect?

Components

area/uiux: Front-end, user experience, plotting, JavaScript, JavaScript dev server

How should the PR be classified in the release notes? Choose one:

rn/none - No description will be included. The PR will be mentioned only by the PR number in the "Small Bugfixes and Documentation Updates" section
rn/breaking-change - The PR will be mentioned in the "Breaking Changes" section
rn/feature - A new user-facing feature worth mentioning in the release notes
rn/bug-fix - A user-facing bug fix worth mentioning in the release notes
rn/documentation - A user-facing documentation change worth mentioning in the release notes

Should this PR be included in the next patch release?

Yes (this PR will be cherry-picked and included in the next patch release)
No (this PR will be included in the next minor release)

Original prompt

This section details on the original issue you should resolve

<issue_title>[BUG] Group mode should show additional runs as a group</issue_title>
<issue_description>### Issues Policy acknowledgement

I have read and agree to submit bug reports in accordance with the issues policy

Where did you encounter this bug?

Local machine

MLflow version

Client: 3.9.0

Tracking server: 3.9.0

System information

OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Windows

Python version: 3.12.12

Describe the problem

Currently, runs which do not have the attribute used to group are gathered in "Additional runs" and display on the plots as individual runs, while groups are displayed as a mean of all the run they contain. It would make more sense to gather all the "Additional runs" in a group called "Others" (or "Undefined") and display it as any other groups (not individual runs). The would make more sense as now it is very confusing to see individual runs and aggregated runs in the same plots.

Tracking information
REPLACE_ME
Code to reproduce issue
REPLACE_ME
Stack trace
REPLACE_ME
Other info / logs
REPLACE_ME
What component(s) does this bug affect?

area/tracking: Tracking Service, tracking client APIs, autologging

area/model-registry: Model Registry service, APIs, and the fluent client calls for Model Registry

area/scoring: MLflow model serving, deployment tools, Spark UDFs

area/evaluation: MLflow model evaluation features, evaluation metrics, and evaluation workflows

area/prompt: MLflow prompt engineering features, prompt templates, and prompt management

area/tracing: MLflow Tracing features, tracing APIs, and LLM tracing functionality

area/gateway: MLflow AI Gateway client APIs, server, and third-party integrations

area/projects: MLproject format, project running backends

area/uiux: Front-end, user experience, plotting

area/docs: MLflow documentation pages</issue_description>

<agent_instructions>guide: #21129 (comment)</agent_instructions>

Comments on the Issue (you are @copilot in this section)
@WeichenXu123 Yes this proposal makes sense to me and @daniellok-db
We need to aggregate additional runs as "Others" group in the following charts.

</comment_new>

Fixes [BUG] Group mode should show additional runs as a group #21129

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

…up in charts Co-authored-by: WeichenXu123 <19235986+WeichenXu123@users.noreply.github.com>

WeichenXu123

LGTM.

Copilot

Pull request overview

This PR fixes grouped-run chart behavior in the experiment “compare runs” view by ensuring runs that lack the grouping attribute are charted as a single aggregated trace (labeled “Unassigned”) instead of multiple per-run traces.

Changes:

Update compare-charts trace generation to aggregate all group headers (including the remaining-runs group) uniformly.
Update remaining-runs group display name to return "Unassigned" for chart legend/tooltip labeling.
Adjust unit/integration tests to include the remaining-runs group header and validate updated display names.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.tsx	Removes special-casing so remaining-runs group is included as an aggregated group trace.
mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.test.tsx	Updates mixed group/ungrouped test data shape to include remaining-runs group header.
mlflow/server/js/src/experiment-tracking/components/experiment-page/utils/experimentPage.group-row-utils.ts	Changes remaining-runs group display label to `"Unassigned"`.
mlflow/server/js/src/experiment-tracking/components/experiment-page/utils/experimentPage.group-row-utils.test.ts	Updates assertions to expect `"Unassigned"` for remaining-runs group display name.

mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.test.tsx

mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.tsx

github-actions · 2026-03-02T13:40:57Z

Documentation preview for a7945ba is available at:

https://pr-21155--mlflow-docs-preview.netlify.app/docs/latest/

More info

Ignore this comment if this PR does not change the documentation.
The preview is updated when a new commit is pushed to this PR.
This comment was created by this workflow run.
The documentation was built by this workflow run.

…re/RunsCompare.tsx Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Signed-off-by: WeichenXu <weichen.xu@databricks.com>

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

…ns-compare/RunsCompare.tsx" This reverts commit f406b3e. Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

…n charts (mlflow#21155) Signed-off-by: WeichenXu <weichen.xu@databricks.com> Signed-off-by: Weichen Xu <weichen.xu@databricks.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: WeichenXu123 <19235986+WeichenXu123@users.noreply.github.com> Co-authored-by: WeichenXu <weichen.xu@databricks.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

…n charts (#21155) Signed-off-by: WeichenXu <weichen.xu@databricks.com> Signed-off-by: Weichen Xu <weichen.xu@databricks.com> Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: WeichenXu123 <19235986+WeichenXu123@users.noreply.github.com> Co-authored-by: WeichenXu <weichen.xu@databricks.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Initial plan

f3bdeaf

Copilot AI assigned Copilot and WeichenXu123 Feb 26, 2026

Copilot started work on behalf of WeichenXu123 February 26, 2026 08:59 View session

Fix group mode to show additional runs as aggregated 'Unassigned' gro…

babf77a

…up in charts Co-authored-by: WeichenXu123 <19235986+WeichenXu123@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix display of additional runs in group mode~~ Fix group mode to aggregate "Additional runs" as "Unassigned" group in charts Feb 26, 2026

Copilot finished work on behalf of WeichenXu123 February 26, 2026 09:20

WeichenXu123 marked this pull request as ready for review March 2, 2026 13:29

Copilot AI review requested due to automatic review settings March 2, 2026 13:29

github-actions bot added area/uiux Front-end, user experience, plotting, JavaScript, JavaScript dev server rn/bug-fix Mention under Bug Fixes in Changelogs. size/M labels Mar 2, 2026

WeichenXu123 approved these changes Mar 2, 2026

View reviewed changes

Copilot started reviewing on behalf of WeichenXu123 March 2, 2026 13:30 View session

WeichenXu123 mentioned this pull request Mar 2, 2026

[BUG] Group mode should show additional runs as a group #21129

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Copilot AI reviewed Mar 2, 2026

View reviewed changes

mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.test.tsx Outdated Show resolved Hide resolved

mlflow/server/js/src/experiment-tracking/components/runs-compare/RunsCompare.tsx Show resolved Hide resolved

Update mlflow/server/js/src/experiment-tracking/components/runs-compa…

f406b3e

…re/RunsCompare.tsx Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Signed-off-by: WeichenXu <weichen.xu@databricks.com>

github-actions bot added the v3.10.1 label Mar 4, 2026

WeichenXu123 added 2 commits March 4, 2026 11:12

nit

194a074

Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

Revert "Update mlflow/server/js/src/experiment-tracking/components/ru…

a7945ba

…ns-compare/RunsCompare.tsx" This reverts commit f406b3e. Signed-off-by: Weichen Xu <weichen.xu@databricks.com>

WeichenXu123 enabled auto-merge March 4, 2026 03:16

WeichenXu123 added this pull request to the merge queue Mar 4, 2026

Merged via the queue into master with commit 65d962d Mar 4, 2026
17 checks passed

WeichenXu123 deleted the copilot/fix-group-mode-display-issue branch March 4, 2026 03:32

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Fix group mode to aggregate "Additional runs" as "Unassigned" group in charts#21155

Fix group mode to aggregate "Additional runs" as "Unassigned" group in charts#21155
WeichenXu123 merged 5 commits intomasterfrom
copilot/fix-group-mode-display-issue

Copilot AI commented Feb 26, 2026 •

edited by WeichenXu123

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How is this PR tested?

Does this PR require documentation update?

Does this PR require updating the MLflow Skills repository?

Release Notes

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What component(s), interfaces, languages, and integrations does this PR affect?

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Should this PR be included in the next patch release?

Where did you encounter this bug?

MLflow version

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Copilot AI commented Feb 26, 2026 •

edited by WeichenXu123

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