69 lines
2.5 KiB
Plaintext
69 lines
2.5 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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==== Term Suggesters supported distance algorithms
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The following string distance algorithms were given additional names in 6.2 and
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their existing names were deprecated. The deprecated names have now been
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removed.
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* `levenstein` - replaced by `levenshtein`
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* `jarowinkler` - replaced by `jaro_winkler`
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==== Limiting the number of terms that can be used in a Terms Query request
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Executing a Terms Query with a lot of terms may degrade the cluster performance,
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as each additional term demands extra processing and memory.
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To safeguard against this, the maximum number of terms that can be used in a
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Terms Query request has been limited to 65536. This default maximum can be changed
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for a particular index with the index setting `index.max_terms_count`.
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==== Limiting the length of regex that can be used in a Regexp Query request
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Executing a Regexp Query with a long regex string may degrade search performance.
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To safeguard against this, the maximum length of regex that can be used in a
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Regexp Query request has been limited to 1000. This default maximum can be changed
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for a particular index with the index setting `index.max_regex_length`.
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