) (#219626)

# Backport

This will backport the following commits from `main` to `8.17`:
- [[Search] Fix content Indices documents error on paginate
(#219471)](#219471)

<!--- Backport version: 9.6.6 -->

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

<!--BACKPORT [{"author":{"name":"Saarika
Bhasi","email":"55930906+saarikabhasi@users.noreply.github.com"},"sourceCommit":{"committedDate":"2025-04-29T15:24:07Z","message":"[Search]
Fix content Indices documents error on paginate (#219471)\n\nInitially
added fix in `8.17` branch
in\n[PR](#219411), but need
this\nchange in `main`, `8.18`, `8.19` & `9.0.0` and the file's paths
are\ndifferent in all versions(main, 8.18/8.19, 8.17, 9.0.0).\n\nCreated
this new PR, adding fix in `main` & will try to backport to\nother
versions.\n\n## Summary\nWhen `track_total_hits` is not provided to
`fetchSearchResults`, the\nvalue is set to `false`. As a result, the
`search` api does not include\ntotal hit count in its response. Thus,
the total count of hit is 0 and\nonPaginate results in error. This PR
sets `track_total_hits` as an\noptional argument in
`fetchSearchResults`\n\n**Note**\nOne other option would be to set
`track_total_hits` to true but, based\non
this\n[documentation](https://www.elastic.co/docs/solutions/search/the-search-api#track-total-hits)\nsetting
`track_total_hits` to true would affect query
performance.\n\n```\nSetting track_total_hits to true will cause
Elasticsearch to return exact hit counts, which could hurt query
performance because it disables the [Max
WAND](https://www.elastic.co/blog/faster-retrieval-of-top-hits-in-elasticsearch-with-block-max-wand)
optimization.\n\n````\n\n\n\nhttps://github.com/user-attachments/assets/4284e88f-2614-4fbe-a0eb-1980355f5bff\n\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
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Fix content Indices documents error on
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Fix content Indices documents error on paginate (#219471)\n\nInitially
added fix in `8.17` branch
in\n[PR](#219411), but need
this\nchange in `main`, `8.18`, `8.19` & `9.0.0` and the file's paths
are\ndifferent in all versions(main, 8.18/8.19, 8.17, 9.0.0).\n\nCreated
this new PR, adding fix in `main` & will try to backport to\nother
versions.\n\n## Summary\nWhen `track_total_hits` is not provided to
`fetchSearchResults`, the\nvalue is set to `false`. As a result, the
`search` api does not include\ntotal hit count in its response. Thus,
the total count of hit is 0 and\nonPaginate results in error. This PR
sets `track_total_hits` as an\noptional argument in
`fetchSearchResults`\n\n**Note**\nOne other option would be to set
`track_total_hits` to true but, based\non
this\n[documentation](https://www.elastic.co/docs/solutions/search/the-search-api#track-total-hits)\nsetting
`track_total_hits` to true would affect query
performance.\n\n```\nSetting track_total_hits to true will cause
Elasticsearch to return exact hit counts, which could hurt query
performance because it disables the [Max
WAND](https://www.elastic.co/blog/faster-retrieval-of-top-hits-in-elasticsearch-with-block-max-wand)
optimization.\n\n````\n\n\n\nhttps://github.com/user-attachments/assets/4284e88f-2614-4fbe-a0eb-1980355f5bff\n\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
updated or added to match the most common
scenarios","sha":"69d71244d67c7659590aa04f04cea5dd06e2d290"}},"sourceBranch":"main","suggestedTargetBranches":["8.17"],"targetPullRequestStates":[{"branch":"9.0","label":"v9.0.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/219579","number":219579,"state":"MERGED","mergeCommit":{"sha":"6bca376012094c252dae8e582893b46f1eda8fda","message":"[9.0]
[Search] Fix content Indices documents error on paginate (#219471)
(#219579)\n\n# Backport\n\nThis will backport the following commits from
`main` to `9.0`:\n- [[Search] Fix content Indices documents error on
paginate\n(#219471)](https://github.com/elastic/kibana/pull/219471)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
Saarika Bhasi
<55930906+saarikabhasi@users.noreply.github.com>"}},{"branch":"8.17","label":"v8.17.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.18","label":"v8.18.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/219577","number":219577,"state":"MERGED","mergeCommit":{"sha":"296b3c22d31c66dc46aec93051e371b30c286d8c","message":"[8.18]
[Search] Fix content Indices documents error on paginate (#219471)
(#219577)\n\n# Backport\n\nThis will backport the following commits from
`main` to `8.18`:\n- [[Search] Fix content Indices documents error on
paginate\n(#219471)](https://github.com/elastic/kibana/pull/219471)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
Saarika Bhasi
<55930906+saarikabhasi@users.noreply.github.com>"}},{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/219471","number":219471,"mergeCommit":{"message":"[Search]
Fix content Indices documents error on paginate (#219471)\n\nInitially
added fix in `8.17` branch
in\n[PR](#219411), but need
this\nchange in `main`, `8.18`, `8.19` & `9.0.0` and the file's paths
are\ndifferent in all versions(main, 8.18/8.19, 8.17, 9.0.0).\n\nCreated
this new PR, adding fix in `main` & will try to backport to\nother
versions.\n\n## Summary\nWhen `track_total_hits` is not provided to
`fetchSearchResults`, the\nvalue is set to `false`. As a result, the
`search` api does not include\ntotal hit count in its response. Thus,
the total count of hit is 0 and\nonPaginate results in error. This PR
sets `track_total_hits` as an\noptional argument in
`fetchSearchResults`\n\n**Note**\nOne other option would be to set
`track_total_hits` to true but, based\non
this\n[documentation](https://www.elastic.co/docs/solutions/search/the-search-api#track-total-hits)\nsetting
`track_total_hits` to true would affect query
performance.\n\n```\nSetting track_total_hits to true will cause
Elasticsearch to return exact hit counts, which could hurt query
performance because it disables the [Max
WAND](https://www.elastic.co/blog/faster-retrieval-of-top-hits-in-elasticsearch-with-block-max-wand)
optimization.\n\n````\n\n\n\nhttps://github.com/user-attachments/assets/4284e88f-2614-4fbe-a0eb-1980355f5bff\n\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
updated or added to match the most common
scenarios","sha":"69d71244d67c7659590aa04f04cea5dd06e2d290"}},{"branch":"8.19","label":"v8.19.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"url":"https://github.com/elastic/kibana/pull/219578","number":219578,"state":"MERGED","mergeCommit":{"sha":"7790ebc7b5511c07aa057a085a349647381f5c31","message":"[8.19]
[Search] Fix content Indices documents error on paginate (#219471)
(#219578)\n\n# Backport\n\nThis will backport the following commits from
`main` to `8.19`:\n- [[Search] Fix content Indices documents error on
paginate\n(#219471)](https://github.com/elastic/kibana/pull/219471)\n\n\n\n###
Questions ?\nPlease refer to the [Backport
tool\ndocumentation](https://github.com/sorenlouv/backport)\n\n\n\nCo-authored-by:
Saarika Bhasi <55930906+saarikabhasi@users.noreply.github.com>"}}]}]
BACKPORT-->