Today we index dummy values for seq_ids and version on nested documents.
This is on the one hand trappy since users can request these values via
inner hits and on the other hand not necessarily good for compression since
the dummy value will likely not compress well when seqIDs are lowish.
This change ensures that we share the same field values for all documents in a
nested block. This won't have any overhead, in-fact it might be more efficient since
we even reduce the work needed slightly.
Stardardize underscore requirements in parameters across different type of
requests:
_index, _type, _source, _id keep their underscores
params like version and retry_on_conflict will be without underscores
Throw an error if older versions of parameters are used
BulkRequest, MultiGetRequest, TermVectorcRequest, MoreLikeThisQuery
were changed
Closes#26886
The default value for ignore_unavailable did not match what was documented when using the REST APIs for snapshot creation and restore. This commit sets the default value of ignore_unavailable to false, the way it is documented and ensures it's the same when using either REST API or transport client.
Closes#25359
* REST: Rename ingest.processor.grok to ingest.processor_grok
* REST: Rename remote.info to cluster.remote_info
* REST: Fixed bad YAML comments
* REST: Force dummy scripts to be strings, not numbers
* REST: Fix bad YAML in search/110_field_collapsing.yml
* REST: Adjust percentile tests to work with Perl number handling
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).
This change adds a new `_split` API that allows to split indices into a new
index with a power of two more shards that the source index. This API works
alongside the `_shrink` API but doesn't require any shard relocation before
indices can be split.
The split operation is conceptually an inverse `_shrink` operation since we
initialize the index with a _syntetic_ number of routing shards that are used
for the consistent hashing at index time. Compared to indices created with
earlier versions this might produce slightly different shard distributions but
has no impact on the per-index backwards compatibility. For now, the user is
required to prepare an index to be splittable by setting the
`index.number_of_routing_shards` at index creation time. The setting allows the
user to prepare the index to be splittable in factors of
`index.number_of_routing_shards` ie. if the index is created with
`index.number_of_routing_shards: 16` and `index.number_of_shards: 2` it can be
split into `4, 8, 16` shards. This is an intermediate step until we can make
this the default. This also allows us to safely backport this change to 6.x.
The `_split` operation is implemented internally as a DeleteByQuery on the
lucene level that is executed while the primary shards execute their initial
recovery. Subsequent merges that are triggered due to this operation will not be
executed immediately. All merges will be deferred unti the shards are started
and will then be throttled accordingly.
This change is intended for the 6.1 feature release but will not support pre-6.1
indices to be split unless these indices have been shrunk before. In that case
these indices can be split backwards into their original number of shards.
* Enhances exists queries to reduce need for `_field_names`
Before this change we wrote the name all the fields in a document to a `_field_names` field and then implemented exists queries as a term query on this field. The problem with this approach is that it bloats the index and also affects indexing performance.
This change adds a new method `existsQuery()` to `MappedFieldType` which is implemented by each sub-class. For most field types if doc values are available a `DocValuesFieldExistsQuery` is used, falling back to using `_field_names` if doc values are disabled. Note that only fields where no doc values are available are written to `_field_names`.
Closes#26770
* Addresses review comments
* Addresses more review comments
* implements existsQuery explicitly on every mapper
* Reinstates ability to perform term query on `_field_names`
* Added bwc depending on index created version
* Review Comments
* Skips tests that are not supported in 6.1.0
These values will need to be changed after backporting this PR to 6.x
Update API, Cluster Update Settings API and Put Index Template API didn't have the request body set to required in their spec, hence this commit updates the spec to align them with reality.
The new discovery stats were pushed to the 6.x branch (currently
versioned at 6.1.0) but master was not updated to reflect this. This
impacts the mixed-cluster BWC tests because a 6.1.0 node will be trying
to send a 7.0.0 node the new discovery stats but the 7.0.0 did not yet
understand that it should be reading these when talking to a 6.1.0
node. This commit addresses this, and changes the skip version on the
discovery stats REST tests.
It's believed that using diffs obsoletes the other mechanism for reusing the
bits of the ClusterState that didn't change between updates, but in fact we
don't know for sure how often the diff mechanism works successfully. The stats
collected here will tell us.
The shard preference _primary, _replica and its variants were useful
for the asynchronous replication. However, with the current impl, they
are no longer useful and should be removed.
Closes#26335
This test has been failing in th Ruby runner, since it assumed the `headers` feature,
but was not annotated accordingly.
This patch adds the `skip` clause with the `headers` feature.
Closes#26896
Early termination with index sorting always return the best top N in the response but set the flag `terminated_early`
in the response. This can be confusing because we use the same flag for `terminate_after` which on the contrary returns partial results.
This change removes the flag when results are not partial (early termination due to index sorting) and keeps it only when `terminate_after` is used.
Closes#26408
Adds the wait_for_active_shards parameter to the index open command. Similar to the index creation command, the index open command will now, by default, wait until the primaries have been allocated.
Closes#20937
This commit adds a skip for the bad request REST test on pre-6.0
nodes. Previously, a request for /_(.*) where $1 is not an existing
endpoint would return a 404. This is because the request would be
treated as a get index request for an index named _$1. However, an index
can never start with "_" so logic was added to detect this and return a
400 instead as this should be treated as a bad request. During the
mixed-cluster BWC tests, a node running pre-6.0 code will still return a
404 though. Therefore, this test needs to skipped in such a
mixed-cluster scenario.
This commit adds validation to the resolving of indexes in the wildcard
expression resolver. It no longer throws a 404 Not Found when resolving
invalid indices. It throws a 400 instead, as it is an invalid
index. This was the behavior of 5.x.
After backporting the script_field soft limit to the 6.x branches, this test can
now also run in a mixed cluster.
Relates to #26598
enter the commit message for your changes. Lines starting
Today we have all non-plugin mappers in core. I'd like to start moving those
that neither map to json datatypes nor are very frequently used like `date` or
`ip` to a module.
This commit creates a new module called `mappers-extra` and moves the
`scaled_float` and `token_count` mappers to it. I'd like to eventually move
`range` fields there but it's more complicated due to their intimate
relationship with range queries.
Relates #10368
Requesting to many script_fields in a search request can be costly
because of script execution. This change introduces a soft limit on the number
of script fields that are allowed per request. The setting can be
changed per index using the index.max_script_fields setting.
Relates to #26390
Requesting to many docvalue_fields in a search request can potentially be costly
because it might incur a per-field per-document seek. This change introduces a
soft limit on the number of fields that can be retrieved. The setting can be
changed per index using the `index.max_docvalue_fields_search` setting.
Relates to #26390
This change exposes the duplicate removal option added in Lucene for the completion suggester
with a new option called `skip_duplicates` (defaults to false).
This commit also adapts the custom suggest collector to handle deduplication when multiple contexts match the input.
Closes#23364
This change adds a dynamic cluster setting named `search.max_keep_alive`.
It is used as an upper limit for scroll expiry time in scroll queries and defaults to 1 hour.
This change also ensures that the existing setting `search.default_keep_alive` is always smaller than `search.max_keep_alive`.
Relates #11511
* check style
* add skip for bwc
* iter
* Add a maxium throttle wait time of 1h for reindex
* review
* remove empty line
The `from` search parameter cannot really be used in scrolled searches. This
commit adds a check for this case to the SearchRequest#validate() method so we
can reported it as an error rather than silently ignoring it.
Closes#9373
* Add REST tests for value_count, stats, extended_stats and cardinality aggs
Also updates the document type of of other agg REST tests to `doc`
Related to #26220
Due to the weird way of structuring the serialization code in AcknowledgedRequest, many request types forgot to properly serialize the request timeout, for example "index deletion", "index rollover", "index shrink", "putting pipeline", and other requests. This means that if those requests were not directly sent to the master node, the acknowledgement timeout information would be lost (and the default used instead).
Some requests also don't properly expose the timeout mechanism in the REST layer, such as put / delete stored script. This commit fixes all that.
Raw requests are supported only by the java yaml test runner and were introduced to test docs snippets. Some yaml tests ended up using them (see #23497) which causes failures for other language clients. This commit migrates those yaml tests to Java tests that send requests through the Java low-level REST client, and also moves the ability to send raw requests to a special client that's only available when testing docs snippets.
Closes#25694
When `refresh=wait_for` is set on an indexing request, we register a listener on the shards that are call during the next refresh. During the recover translog phase, when the engine is open, we have a window of time when indexing operations succeed and they can add their listeners. Those listeners will only be called when the recovery finishes as we do not refresh during recoveries (unless the indexing buffer is full). Next to being a bad user experience, it can also cause deadlocks with an ongoing peer recovery that may wait for those operations to mark the replica in sync (details below).
To fix this, this PR changes refresh listeners to be a noop when the shard is not yet serving reads (implicitly covering the recovery period). It doesn't matter anyway.
Deadlock with recovery:
When finalizing a peer recovery we mark the peer as "in sync". To do so we wait until the peer's local checkpoint is at least as high as the global checkpoint. If an operation with `refresh=wait_for` is added as a listener on that peer during recovery, it is not completed from the perspective of the primary. The primary than may wait for it to complete before advancing the local checkpoint for that peer. Since that peer is not considered in sync, the global checkpoint on the primary can be higher, causing a deadlock. Operation waits for recovery to finish and a refresh to happen. Recovery waits on the operation.
In the refresh REST tests we setup some persistent settings for debug
logging. In the teardown, we try to restore the logging level back to
info via another persistent setting but this is a mistake because other
tests check if there are no persistent settings. To fix this, we remove
the persistent setting that we added.
We are chasing a test failure in the "refresh=wait_for waits until
changes are visible in search" test yet the logs currently give us no
indication what is happening. This commit adds debug logging for this
test, and cleans up this logging in a teardown section. We can remove
this additional logging after we chase the test failure down.
Since the setup attempts to create an index with two types, and the setup runs before any test,
this will fail on versions 6.0+ before it has a chance to check the skip in each individual
test. Moving to the setup resolves this issue.
This change rewrites search requests on the coordinating node before
we send requests to the individual shards. This will reduce the rewrite load
and object creation for each rewrite on the executing nodes and will fetch
resources only once instead of N times once per shard for queries like `terms`
query with index lookups. (among percolator and geo-shape)
Relates to #25791
Also has updates to ScriptMetaData for allowing the old namespace format to be loaded all the way back through 5.0; however, it will throw an exception if two scripts share the same id but different languages.
With #23997 and #25268 we have changed put alias, delete alias, update aliases and delete index to not accept aliases. Instead concrete indices should be provided as their index parameter.
This commit improves the error message in case aliases are provided, from an IndexNotFoundException (404 status code) with "no such index" message, to an IllegalArgumentException (400 status code) with "The provided expression [alias] matches an alias, specify the corresponding concrete indices instead." message.
Note that there is no specific error message for the case where wildcard expressions match one or more aliases. In fact, aliases are simply ignored when expanding wildcards for such APIs. An error is thrown only when the expression ends up matching no indices at all, and allow_no_indices is set to false. In that case the error is still the generic "404 - no such index".
403 can be confused with security. If an API doesn't support working against closed indices and closed indices are referred to in a request, that is a bad request, hence 400 is more appropriate.
Currently the `to` and `from` parameter in the `date_range` aggregation is not
parsed with the correct date field format from the mappings or the aggregation
if the argument is numeric, but always treated as a long value specifying
`epoch_millis`. This leads to problems e.g. when the format is `epoch_second`,
but the `to` and `from` are currently treated as millis.
With this change, we interpret these parameters according to the `format` of the target field.
If the `format` in the mappings is not compatible with numeric input values,
a compatible `format` (e.g. `epoch_millis`, `epoch_second`) must be specified in
the `date_range` aggregation itself, otherwise an error is thrown.
#Closes #17920
This commit reverts some changes to the shrink API ignore template
mapping REST test in favor of simply skipping the test for BWC
purposes. The complexity here is due to deprecations and lacking the
infrastructure to gracefully handle a situation like this.
This change skips the rest test in `rest-api-spec/test/indices.shrink/20_source_mapping.yml` as it currently fails because if we don’t expect the deprecation warning the normal rest tests fail because they get a warning they don’t expect but if we do expect the deprecation warning the mixed cluster tests fail because they don’t get a warning which they expected.
This commit fixes an issue with the REST test that the shrink API
ignores templates. The problem is that we have to use a BWC version of
the API (for the BWC tests) but this raises deprecation warnings. This
commit adds an expectation for these deprecation warnings.
This commit adjusts the skip version for a shrink index test that
ensures that a shrunken index ignores templates; the version can be
adjusted after the fix was backported targeting 5.6.0 and later.
Relates #25380
When parsing indices options from REST, we parse the optional parameters that are supported at REST (ignore_unavailable, allow_no_indices and expand_wildcards) and we provide the API default values for all the other (internal) options so that they are set to the new indices options while parsing. The `ignoreAliases` option was forgotten though, which means that whenever you pass in any index option at REST to the delete index API, you get to delete aliases like it was supported before (as ignoreAliases gets set to false like in all the other APIs).
Added unit tests for IndicesOptions parsing from REST parameters, and yaml tests for the delete index API.
A shrunk index should ignore anything from templates and instead take
its mappings, aliases, and settings from the original index, plus any
new settings and aliases passed in with the shrink request. This commit
causes this to be the case.
Relates #25380
Today if we search across a large amount of shards we hit every shard. Yet, it's quite
common to search across an index pattern for time based indices but filtering will exclude
all results outside a certain time range ie. `now-3d`. While the search can potentially hit
hundreds of shards the majority of the shards might yield 0 results since there is not document
that is within this date range. Kibana for instance does this regularly but used `_field_stats`
to optimize the indexes they need to query. Now with the deprecation of `_field_stats` and it's upcoming removal a single dashboard in kibana can potentially turn into searches hitting hundreds or thousands of shards and that can easily cause search rejections even though the most of the requests are very likely super cheap and only need a query rewriting to early terminate with 0 results.
This change adds a pre-filter phase for searches that can, if the number of shards are higher than a the `pre_filter_shard_size` threshold (defaults to 128 shards), fan out to the shards
and check if the query can potentially match any documents at all. While false positives are possible, a negative response means that no matches are possible. These requests are not subject to rejection and can greatly reduce the number of shards a request needs to hit. The approach here is preferable to the kibana approach with field stats since it correctly handles aliases and uses the correct threadpools to execute these requests. Further it's completely transparent to the user and improves scalability of elasticsearch in general on large clusters.
Flake ids organize bytes in such a way that ids are ordered. However, we do not
need that property and could reorganize bytes in an order that would better suit
Lucene's terms dict instead.
Some synthetic tests suggest that this change decreases the disk footprint of
the `_id` field by about 50% in many cases (see `UUIDTests.testCompression`).
For instance, when simulating the indexing of 10M docs at a rate of 10k docs
per second, the current uid generator used 20.2 bytes per document on average,
while this new generator which only puts bytes in a different order uses 9.6
bytes per document on average.
We had already explored this idea in #18209 but the attempt to share long common
prefixes had had a bad impact on indexing speed. This time I have been more
careful about putting discriminant bytes early in the `_id` in a way that
preserves indexing speed on par with today, while still allowing for better
compression.
This is a protection mechanism to prevent a single search request from
hitting a large number of shards in the cluster concurrently. If a search is
executed against all indices in the cluster this can easily overload the cluster
causing rejections etc. which is not necessarily desirable. Instead this PR adds
a per request limit of `max_concurrent_shard_requests` that throttles the number of
concurrent initial phase requests to `256` by default. This limit can be increased per request
and protects single search requests from overloading the cluster. Subsequent PRs can introduces
addiontional improvemetns ie. limiting this on a `_msearch` level, making defaults a factor of
the number of nodes or sort shards iters such that we gain the best concurrency across nodes.
The created and found fields in index and delete responses became obsolete after the introduction of the result field in index, update and delete responses (#19566).
After deprecating the created and found fields in 5.x (#19633), now they are removed.
Fixes#19630
* Adds rewrite phase to aggregations
This change adds aggregations to the rewrite performed by the `SearchSourceBuilder`. This means that `AggregationBuilder`s are able to implement a `rewrite()` method where they can return a new `AggregationBuilder` which is functionally the same but in a more primitive form. This is exactly analogous to the rewrite done by the `QueryBuilder`s.
The first aggregation to implement the rewrite are the filter and filters aggregations so they can rewrite the filters they contain.
Closes#17676
* Removes rewrite from PipelineAggregationBuilder
Rewrite is based on shard level information. Since pipeline aggregation are run in the reduce phase it doesn’t make sense to rewrite them on the shards. In fact eventually we shouldn’t be transporting them to the shards at all and should be retaining them on the coordinating node for execution in the reduce phase
* Addresses review comments
* addresses more review comments
* Fixed imports
This commit adjusts the BWC version on the bad cluster allocation
explain request test as changing the API to respond with a bad request
status instead of an internal server error status was backported to 5.x
to be included in 5.6.0.
Relates #25503
When a user requests a cluster allocation explain in a situation where
it does not make sense (for example, there are no unassigned shards), we
should consider this a bad request instead of a server error. Yet, today
by throwing an illegal state exception, these are treated as server
errors. This commit adjusts these so that they throw illegal argument
exceptions and are treated as bad requests.
Relates #25503
In #24477, a less verbose option was added to retrieve snapshot info via
GET /_snapshot/{repo}/{snapshots}. The point of adding this less
verbose option was so that if the repository is a cloud based one, and
there are many snapshots for which the snapshot info needed to be
retrieved, then each snapshot would require reading a separate snapshot
metadata file to pull out the necessary information. This can be costly
(performance and cost) on cloud based repositories, so a less verbose
option was added that only retrieves very basic information about each
snapshot that is all available in the index-N blob - requiring only one
read!
In order to display this less verbose snapshot info appropriately, logic
was added to not display those fields which could not be populated.
However, this broke integrators (e.g. ECE) that required these fields to
be present, even if empty. This commit is to return these fields in the
response, even if empty, if the verbose option is set.
Expand `/_cat/nodes` with already present information about available disk space `diskAvail` (alias: `d`, `disk`) by:
* `diskTotal` (alias `dt`): total disk space
* `diskUsed` (alias `du`): used disk space (`diskTotal - diskAvail`)
* `diskUsedPercent` (alias `dup`): used disk space percentage
Note: The available disk space is the number of bytes available to the node's Java virtual machine. The size might be smaller than the real one. That means the used disk space (percentage) is larger.
Closes#21679
This change removes the remaining explicitly specified `index.mapper.single_type`
settings from tests in order to allow the removal of the setting.
This is the already approved part of #25375 broken out to simplfiy reviews on
#25147 added the translog deletion policy but didn't enable it by default. This PR enables a default retention of 512MB (same maximum size of the current translog) and an age of 12 hours (i.e., after 12 hours all translog files will be deleted). This increases to chance to have an ops based recovery, even if the primary flushed or the replica was offline for a few hours.
In order to see which parts of the translog are committed into lucene the translog stats are extended to include information about uncommitted operations.
Views now include all translog ops and guarantee, as before, that those will not go away. Snapshotting a view allows to filter out generations that are not relevant based on a specific sequence number.
Relates to #10708
* [Analysis] Parse synonyms with the same analysis chain
Synonym Token Filter / Synonym Graph Filter tokenize synonyms with whatever tokenizer and token filters appear before it in the chain.
Close#7199
This commit removes the global caching of the field query and replaces it with
a caching per field. Each field can use a different `highlight_query` and the rewriting of
some queries (prefix, automaton, ...) depends on the targeted field so the query used for highlighting
must be unique per field.
There might be a small performance penalty when highlighting multiple fields since the query needs to be rewritten
once per highlighted field with this change.
Fixes#25171
Simon Willnauer
Mayya Sharipova
Yannick Welsch
kel
Clinton Gormley
Jim Ferenczi
Boaz Leskes
olcbean
Nick Lang
Russ Cam
Nhat
Nhat
Colin Goodheart-Smithe
Honza Král
Jason Tedor
Nhat
David Turner
Glen Smith
Karel Minarik
Karel Minarik
Alexander Kazakov
Michael Basnight
Christoph Büscher
Adrien Grand
Jim Ferenczi
Zachary Tong
Luca Cavanna
Jack Conradson
Ryan Ernst
Sergey Galkin
Jun Ohtani
Ali Beyad
Andreas Gebhardt
Spencer
Lee Hinman