Coordinator can return partial results after the timeout when allow_partial_search_results is true

opensearch-project / OpenSearch

🔎 Open source distributed and RESTful search engine.

https://opensearch.org/docs/latest/opensearch/index/

Apache License 2.0

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Coordinator can return partial results after the timeout when allow_partial_search_results is true #16681

Open kkewwei opened 2 days ago

kkewwei commented 2 days ago

Description

In query phase, the coordinate concurrently search each shard, If any shard is blocked or responds very slowly, the coordination node will be stuck even if the timeout is set.

The pr supports timeout waiting, if the timeout is exceeded, the coordinator considers the shard as failed and gos on the fetch phase.

Check List

[x] Functionality includes testing.
[x] API changes companion pull request created, if applicable.
[x] Public documentation issue/PR created, if applicable.

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