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29331f1127
Queries that create a scroll context cannot use the cache. They modify the search context during their execution so using the cache can lead to duplicate result for the next scroll query. This change fails the entire request if the request_cache option is explictely set on a query that creates a scroll context (`scroll=1m`) and make sure internally that we never use the cache for these queries when the option is not explicitely used. For 6.x a deprecation log will be printed instead of failing the entire request and the request_cache hint will be ignored (forced to false).
43 lines
1.4 KiB
Plaintext
43 lines
1.4 KiB
Plaintext
[[breaking_70_search_changes]]
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=== Search and Query DSL changes
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==== Changes to queries
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* The default value for `transpositions` parameter of `fuzzy` query
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has been changed to `true`.
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==== Adaptive replica selection enabled by default
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Adaptive replica selection has been enabled by default. If you wish to return to
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the older round robin of search requests, you can use the
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`cluster.routing.use_adaptive_replica_selection` setting:
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[source,js]
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--------------------------------------------------
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PUT /_cluster/settings
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{
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"transient": {
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"cluster.routing.use_adaptive_replica_selection": false
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}
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}
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--------------------------------------------------
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// CONSOLE
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==== Search API returns `400` for invalid requests
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The Search API returns `400 - Bad request` while it would previously return
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`500 - Internal Server Error` in the following cases of invalid request:
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* the result window is too large
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* sort is used in combination with rescore
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* the rescore window is too large
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* the number of slices is too large
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* keep alive for scroll is too large
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* number of filters in the adjacency matrix aggregation is too large
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==== Scroll queries cannot use the request_cache anymore
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Setting `request_cache:true` on a query that creates a scroll ('scroll=1m`)
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has been deprecated in 6 and will now return a `400 - Bad request`.
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Scroll queries are not meant to be cached.
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