Karen X

### What is the bug? The global parameter `source` https://github.com/opensearch-project/opensearch-api-specification/blob/main/spec/_global_parameters.yaml#L28 is not supported for all APIs, for example, [Scroll](https://docs.opensearch.org/docs/latest/api-reference/scroll/) ### How can one reproduce the bug? `GET _search/scroll?source` will return...

### What is the bug? `tests/default/indices/segments.yaml` test is flaky. Runs 2 and 3 of this CI job failed, but 4th try succeded without any code changes. https://github.com/opensearch-project/opensearch-api-specification/actions/runs/14722249535/job/41388391724 ``` FAILED indices/segments.yaml...

# What/Why A critical problem to be solved on the path for [gRPC support in OpenSearch](https://github.com/opensearch-project/OpenSearch/issues/15190), is to have [published Protobuf definitions](https://github.com/opensearch-project/opensearch-api-specification/issues/532), that are fully aligned with the spec. However,...

[GRPC] Make transport-grpc extensible to other plugins

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### Description This PR refactors the GRPC transport module to provide extension points for plugins. The goal is to make it possible for third-party and internal plugins to register custom...

Document GRPC settings and default values in README

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### Description Document how the GRPC settings should be used and add the missing `grpc.netty.max_msg_size` setting to the README. A corresponding PR in the documentation-webste repo will be created later...

### Is your feature request related to a problem? Please describe Currently, third-party plugin authors have no ability to implement and expose custom GRPC APIs in OpenSearch. This restricts the...

[GRPC] Implement Hybrid Queries

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### Description Implement GRPC Hybrid Query ### Test Plan Built and deployed to internal cluster using this change from opensearch core: https://github.com/opensearch-project/OpenSearch/pull/20103 Sample hybrid query: ``` { "search_request_body": { "query":...

Do not mark force_source as deprecated

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### Description force_source is an active field in AbstractHighlighterBuilder (which HighlightBuilder.Field extends). ### Issues Resolved General spec fix By submitting this pull request, I confirm that my contribution is made...

Update `TermsAggregation`, `CardinalityExecutionMode` fields

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### Description #### 1. **TermsAggregation: Removed unsupported fields** Removed `missing_order` and `missing_bucket` fields from `TermsAggregation` as they are **not supported** by [TermsAggregationBuilder](https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/search/aggregations/bucket/terms/TermsAggregationBuilder.java). - **Evidence**: `TermsAggregationBuilder.PARSER` (lines 119-159) does not parse...

[GRPC] Add Terms, Cardinality, Missing aggregations

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### Description [Describe what this change achieves] ### Related Issues Resolves #[Issue number to be closed when this PR is merged] ### Check List - [ ] Functionality includes testing....