117 lines
4.0 KiB
Plaintext
117 lines
4.0 KiB
Plaintext
[[breaking-changes-2.0]]
|
|
== Breaking changes in 2.0
|
|
|
|
This section discusses the changes that you need to be aware of when migrating
|
|
your application to Elasticsearch 2.0.
|
|
|
|
=== Indices API
|
|
|
|
The <<alias-retrieving, get alias api>> will, by default produce an error response
|
|
if a requested index does not exist. This change brings the defaults for this API in
|
|
line with the other Indices APIs. The <<multi-index>> options can be used on a request
|
|
to change this behavior
|
|
|
|
`GetIndexRequest.features()` now returns an array of Feature Enums instrad of an array of String values.
|
|
The following deprecated methods have been removed:
|
|
* `GetIndexRequest.addFeatures(String[])` - Please use `GetIndexRequest.addFeatures(Feature[])` instead
|
|
* `GetIndexRequest.features(String[])` - Please use `GetIndexRequest.features(Feature[])` instead
|
|
* `GetIndexRequestBuilder.addFeatures(String[])` - Please use `GetIndexRequestBuilder.addFeatures(Feature[])` instead
|
|
* `GetIndexRequestBuilder.setFeatures(String[])` - Please use `GetIndexRequestBuilder.setFeatures(Feature[])` instead
|
|
|
|
=== Partial fields
|
|
|
|
Partial fields were deprecated since 1.0.0beta1 in favor of <<search-request-source-filtering,source filtering>>.
|
|
|
|
=== More Like This Field
|
|
|
|
The More Like This Field query has been removed in favor of the <<query-dsl-mlt-query, More Like This Query>>
|
|
restrained set to a specific `field`.
|
|
|
|
=== Routing
|
|
|
|
The default hash function that is used for routing has been changed from djb2 to
|
|
murmur3. This change should be transparent unless you relied on very specific
|
|
properties of djb2. This will help ensure a better balance of the document counts
|
|
between shards.
|
|
|
|
In addition, the following node settings related to routing have been deprecated:
|
|
|
|
[horizontal]
|
|
|
|
`cluster.routing.operation.hash.type`::
|
|
|
|
This was an undocumented setting that allowed to configure which hash function
|
|
to use for routing. `murmur3` is now enforced on new indices.
|
|
|
|
`cluster.routing.operation.use_type`::
|
|
|
|
This was an undocumented setting that allowed to take the `_type` of the
|
|
document into account when computing its shard (default: `false`). `false` is
|
|
now enforced on new indices.
|
|
|
|
=== Store
|
|
|
|
The `memory` / `ram` store (`index.store.type`) option was removed in Elasticsearch 2.0.
|
|
|
|
=== Term Vectors API
|
|
|
|
Usage of `/_termvector` is deprecated, and replaced in favor of `/_termvectors`.
|
|
|
|
=== Script fields
|
|
|
|
Script fields in 1.x were only returned as a single value. So even if the return
|
|
value of a script used to be list, it would be returned as an array containing
|
|
a single value that is a list too, such as:
|
|
|
|
[source,json]
|
|
---------------
|
|
"fields": {
|
|
"my_field": [
|
|
[
|
|
"v1",
|
|
"v2"
|
|
]
|
|
]
|
|
}
|
|
---------------
|
|
|
|
In elasticsearch 2.x, scripts that return a list of values are considered as
|
|
multivalued fields. So the same example would return the following response,
|
|
with values in a single array.
|
|
|
|
[source,json]
|
|
---------------
|
|
"fields": {
|
|
"my_field": [
|
|
"v1",
|
|
"v2"
|
|
]
|
|
}
|
|
---------------
|
|
|
|
=== Java API
|
|
|
|
Some query builders have been removed or renamed:
|
|
|
|
* `commonTerms(...)` renamed with `commonTermsQuery(...)`
|
|
* `queryString(...)` renamed with `queryStringQuery(...)`
|
|
* `simpleQueryString(...)` renamed with `simpleQueryStringQuery(...)`
|
|
* `textPhrase(...)` removed
|
|
* `textPhrasePrefix(...)` removed
|
|
* `textPhrasePrefixQuery(...)` removed
|
|
* `filtered(...)` removed. Use `filteredQuery(...)` instead.
|
|
* `inQuery(...)` removed.
|
|
|
|
=== Terms filter lookup caching
|
|
|
|
The terms filter lookup mechanism does not support the `cache` option anymore
|
|
and relies on the filesystem cache instead. If the lookup index is not too
|
|
large, it is recommended to make it replicated to all nodes by setting
|
|
`index.auto_expand_replicas: 0-all` in order to remove the network overhead as
|
|
well.
|
|
|
|
=== Parent parameter on update request
|
|
|
|
The `parent` parameter has been removed from the update request. Before 2.x it just set the routing parameter. The
|
|
`routing` setting should be used instead. The `parent` setting was confusing, because it had the impression that the parent
|
|
a child documents points to can be changed but this is not true. |