[8.15] [ML] Transform: Fix transform stats API call in the transform …

…health alerting rule (#187586) (#187617)

# Backport

This will backport the following commits from `main` to `8.15`:
- [[ML] Transform: Fix transform stats API call in the transform health
alerting rule (#187586)](#187586)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Dima
Arnautov","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-07-05T07:08:08Z","message":"[ML]
Transform: Fix transform stats API call in the transform health alerting
rule (#187586)\n\n## Summary\r\n\r\nIn rare cases when the list of
continuous transform exceeds the allowed\r\nURL length, we fetch stats
for all transforms.\r\n\r\nThe elasticsearch client has `transform-id`
param as optional, but we\r\nactually have to pass `_all` or `*`. This
PR sets the `transform_id`\r\nparam explicitly in this case.\r\n\r\n###
Checklist\r\n\r\n- [x] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
updated or added to match the most common
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Transform: Fix transform stats API call in the transform health alerting
rule
","number":187586,"url":"https://github.com/elastic/kibana/pull/187586","mergeCommit":{"message":"[ML]
Transform: Fix transform stats API call in the transform health alerting
rule (#187586)\n\n## Summary\r\n\r\nIn rare cases when the list of
continuous transform exceeds the allowed\r\nURL length, we fetch stats
for all transforms.\r\n\r\nThe elasticsearch client has `transform-id`
param as optional, but we\r\nactually have to pass `_all` or `*`. This
PR sets the `transform_id`\r\nparam explicitly in this case.\r\n\r\n###
Checklist\r\n\r\n- [x] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
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Transform: Fix transform stats API call in the transform health alerting
rule (#187586)\n\n## Summary\r\n\r\nIn rare cases when the list of
continuous transform exceeds the allowed\r\nURL length, we fetch stats
for all transforms.\r\n\r\nThe elasticsearch client has `transform-id`
param as optional, but we\r\nactually have to pass `_all` or `*`. This
PR sets the `transform_id`\r\nparam explicitly in this case.\r\n\r\n###
Checklist\r\n\r\n- [x] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
updated or added to match the most common
scenarios","sha":"1a8bacc5473534fe8ec254667d561b0bd3c739d5"}}]}]
BACKPORT-->

Co-authored-by: Dima Arnautov <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

x-pack/plugins/transform/server/lib/alerting/transform_health_rule_type/transform_health_service.test.ts

@@ -117,6 +117,7 @@ describe('transformHealthServiceProvider', () => {
     expect(esClient.transform.getTransformStats).toHaveBeenCalledTimes(1);
     expect(esClient.transform.getTransformStats).toHaveBeenNthCalledWith(1, {
       basic: true,
+      transform_id: '_all',
     });
 
     const notStarted = result[0];

x-pack/plugins/transform/server/lib/alerting/transform_health_rule_type/transform_health_service.ts

@@ -122,6 +122,7 @@ export function transformHealthServiceProvider({
             await esClient.transform.getTransformStats({
               // @ts-expect-error `basic` query option not yet in @elastic/elasticsearch
               basic: true,
+              transform_id: '_all',
             })
           ).transforms as TransformStats[]
         ).filter((t) => transformIds.has(t.id));