[ML] Fix Data visualizer/Field stats not updating distribution when changing shard size

[qn895]

Summary

This PR fixes a bug with the Data visualizer/Field stats not updating distribution when changing shard size.

Checklist

Delete any items that are not applicable to this PR.

• [ ] Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• [ ] Documentation was added for features that require explanation or tutorials
• [ ] Unit or functional tests were updated or added to match the most common scenarios
• [ ] Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• [ ] Any UI touched in this PR does not create any new axe failures (run axe in browser: FF, Chrome)
• [ ] If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• [ ] This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• [ ] This was checked for cross-browser compatibility

Risk Matrix

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Before closing this PR, invite QA, stakeholders, and other developers to identify risks that should be tested prior to the change/feature release.

When forming the risk matrix, consider some of the following examples and how they may potentially impact the change:

Risk	Probability	Severity	Mitigation/Notes
Multiple Spaces—unexpected behavior in non-default Kibana Space.	Low	High	Integration tests will verify that all features are still supported in non-default Kibana Space and when user switches between spaces.
Multiple nodes—Elasticsearch polling might have race conditions when multiple Kibana nodes are polling for the same tasks.	High	Low	Tasks are idempotent, so executing them multiple times will not result in logical error, but will degrade performance. To test for this case we add plenty of unit tests around this logic and document manual testing procedure.
Code should gracefully handle cases when feature X or plugin Y are disabled.	Medium	High	Unit tests will verify that any feature flag or plugin combination still results in our service operational.
See more potential risk examples

For maintainers

• [ ] This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[kibana-ci]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: 0c89f22388cb53b6ed0ecdb65c7bc057fbd6be39

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
dataVisualizer	568.4KB	568.5KB	+18.0B
ml	3.4MB	3.4MB	+116.0B
total			+134.0B

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
dataVisualizer	38	36	-2
ml	577	578	+1
total			-1

Total ESLint disabled count

id	before	after	diff
dataVisualizer	38	36	-2
ml	580	581	+1
total			-1

History

• :green_heart: Build #74642 succeeded 638362ca8e1e597058b289e13c7024990987beae

To update your PR or re-run it, just comment with: @elasticmachine merge upstream

cc @qn895

[kibanamachine]

💔 Some backports could not be created

Status	Branch	Result
❌	7.17	Backport failed because of merge conflicts
❌	8.4	Backport failed because of merge conflicts
✅	8.5

Note: Successful backport PRs will be merged automatically after passing CI.

Manual backport

To create the backport manually run:

node scripts/backport --pr 141313

Questions ?

Please refer to the Backport tool documentation

[qn895]

💚 All backports created successfully

Status	Branch	Result
✅	8.4

Note: Successful backport PRs will be merged automatically after passing CI.

Questions ?

Please refer to the Backport tool documentation