51 lines
2.1 KiB
Plaintext
51 lines
2.1 KiB
Plaintext
[[breaking-changes-2.0]]
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== Breaking changes in 2.0
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This section discusses the changes that you need to be aware of when migrating
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your application to Elasticsearch 2.0.
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=== Indices API
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The <<alias-retrieving, get alias api>> will, by default produce an error response
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if a requested index does not exist. This change brings the defaults for this API in
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line with the other Indices APIs. The <<multi-index>> options can be used on a request
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to change this behavior
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`GetIndexRequest.features()` now returns an array of Feature Enums instrad of an array of String values.
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The following deprecated methods have been removed:
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* `GetIndexRequest.addFeatures(String[])` - Please use `GetIndexRequest.addFeatures(Feature[])` instead
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* `GetIndexRequest.features(String[])` - Please use `GetIndexRequest.features(Feature[])` instead
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* `GetIndexRequestBuilder.addFeatures(String[])` - Please use `GetIndexRequestBuilder.addFeatures(Feature[])` instead
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* `GetIndexRequestBuilder.setFeatures(String[])` - Please use `GetIndexRequestBuilder.setFeatures(Feature[])` instead
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=== Partial fields
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Partial fields were deprecated since 1.0.0beta1 in favor of <<search-request-source-filtering,source filtering>>.
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=== More Like This Field
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The More Like This Field query has been removed in favor of the <<query-dsl-mlt-query, More Like This Query>>
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restrained set to a specific `field`.
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=== Routing
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The default hash function that is used for routing has been changed from djb2 to
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murmur3. This change should be transparent unless you relied on very specific
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properties of djb2. This will help ensure a better balance of the document counts
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between shards.
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In addition, the following node settings related to routing have been deprecated:
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[horizontal]
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`cluster.routing.operation.hash.type`::
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This was an undocumented setting that allowed to configure which hash function
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to use for routing. `murmur3` is now enforced on new indices.
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`cluster.routing.operation.use_type`::
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This was an undocumented setting that allowed to take the `_type` of the
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document into account when computing its shard (default: `false`). `false` is
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now enforced on new indices.
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