Implements a null coalescing operator in painless that looks like `?:`. This form was chosen to emulate Groovy's `?:` operator. It is different in that it only coalesces null values, instead of Groovy's `?:` operator which coalesces all falsy values. I believe that makes it the same as Kotlin's `?:` operator. In other languages this operator looks like `??` (C#) and `COALESCE` (SQL) and `:-` (bash).
This operator is lazy, meaning the right hand side is only evaluated at all if the left hand side is null.
The first changed referred to an example of the 2.4 documentation. I removed the no longer relevant parts. We should consider adding a little more here.
The second change was just then->than in the suggest_mode popular section
* master: (22 commits)
Add proper toString() method to UpdateTask (#21582)
Fix `InternalEngine#isThrottled` to not always return `false`. (#21592)
add `ignore_missing` option to SplitProcessor (#20982)
fix trace_match behavior for when there is only one grok pattern (#21413)
Remove dead code from GetResponse.java
Fixes date range query using epoch with timezone (#21542)
Do not cache term queries. (#21566)
Updated dynamic mapper section
Docs: Clarify date_histogram bucket sizes for DST time zones
Handle release of 5.0.1
Fix skip reason for stats API parameters test
Reduce skip version for stats API parameter tests
Strict level parsing for indices stats
Remove cluster update task when task times out (#21578)
[DOCS] Mention "all-fields" mode doesn't search across nested documents
InternalTestCluster: when restarting a node we should validate the cluster is formed via the node we just restarted
Fixed bad asciidoc in boolean mapping docs
Fixed bad asciidoc ID in node stats
Be strict when parsing values searching for booleans (#21555)
Fix time zone rounding edge case for DST overlaps
...
There is an issue in the Grok Processor, where trace_match: true does not inject the _ingest._grok_match_index into the ingest-document when there is just one pattern provided. This is due to an optimization in the regex construction. This commit adds a check for when this is the case, and injects a static index value of "0", since there is only one pattern matched (at the first index into the patterns).
To make this clearer, more documentation was added to the grok-processor docs.
Fixes#21371.
This changes only the query parsing behavior to be strict when searching on
boolean values. We continue to accept the variety of values during index time,
but searches will only be parsed using `"true"` or `"false"`.
Resolves#21545
Today when parsing a stats request, Elasticsearch silently ignores
incorrect metrics. This commit removes lenient parsing of stats requests
for the nodes stats and indices stats APIs.
Relates #21417
We log deprecation events at "WARN", so setting it to `info` means the events
are still logged. It must be set to `error` in order to disable the logging.
This failure is due to the fact that we sort on store size, which is cached. So
it might happen that the store size that is taken into account is not the right
one, which makes the indices sorted in the wrong order. This changes the doc
example to sort on the number of docs instead.
Closes#21062
* master:
Set vm.max_map_count on systemd package install
[TEST] reduce the number of snapshotted shards to 1 in testSnapshotSucceedsAfterSnapshotFailure() so that we are more likely to trigger I/O exceptions on writing the control files during the finalize phase of snapshotting (with the aim of triggering an I/O failure when writing pending-index-*).
Add documentation for Logger with Transport Client
Enable appender exceptions in UpdateSettingsIT
[TEST] remove AwaitsFix from testSnapshotSucceedsAfterSnapshotFailure, turns out the issue is specific to Java 9 v143
Cleanup formatting in UpdateSettingsIT.java
[TEST] mute the testSnapshotSucceedsAfterSnapshotFailure() test until its clear what is going wrong.
Mark SearchQueryIT test as awaits fix
Makes snapshot throttling test go much faster (#21485)
Breaking changes docs for template index_patterns
[TEST] adds randomness between atomic and non-atomic move operations in MockRepository
Cache successful shard deletion checks (#21438)
Task cancellation command should wait for all child nodes to receive cancellation request before returning
* master:
ShardActiveResponseHandler shouldn't hold to an entire cluster state
Ensures cleanup of temporary index-* generational blobs during snapshotting (#21469)
Remove (again) test uses of onModule (#21414)
[TEST] Add assertBusy when checking for pending operation counter after tests
Revert "Add trace logging when aquiring and releasing operation locks for replication requests"
Allows multiple patterns to be specified for index templates (#21009)
[TEST] fixes rebalance single shard check as it isn't guaranteed that a rebalance makes sense and the method only tests if rebalance is allowed
Document _reindex with random_score
0219a211d3 added support for templates
to have multiple patterns and renamed `template` to `index_patterns`.
This adds the breaking changes docs for that.
* master: (516 commits)
Avoid angering Log4j in TransportNodesActionTests
Add trace logging when aquiring and releasing operation locks for replication requests
Fix handler name on message not fully read
Remove accidental import.
Improve log message in TransportNodesAction
Clean up of Script.
Update Joda Time to version 2.9.5 (#21468)
Remove unused ClusterService dependency from SearchPhaseController (#21421)
Remove max_local_storage_nodes from elasticsearch.yml (#21467)
Wait for all reindex subtasks before rethrottling
Correcting a typo-Maan to Man-in README.textile (#21466)
Fix InternalSearchHit#hasSource to return the proper boolean value (#21441)
Replace all index date-math examples with the URI encoded form
Fix typos (#21456)
Adapt ES_JVM_OPTIONS packaging test to ubuntu-1204
Add null check in InternalSearchHit#sourceRef to prevent NPE (#21431)
Add VirtualBox version check (#21370)
Export ES_JVM_OPTIONS for SysV init
Skip reindex rethrottle tests with workers
Make forbidden APIs be quieter about classpath warnings (#21443)
...
This change was reverted after it caused random test failures. This was
due to a copy/paste error in the original PR which caused the mock
version of ClusterInfoService to be used whenever the mock *ZenPing* was
used, and the real ClusterInfoService to be used when MockZenPing was
not used.
* Allows for an array of index template patterns to be provided to an
index template, and rename the field from 'template' to 'index_pattern'.
Closes#20690
You can use `_reindex` and `random_score` to extract a random
subset of an index but you have to be careful to sort by `_score`
or it won't work.
Closes#21432
This commit introduces a new execution mode for the
`simple_query_string` query, which is intended down the road to be a
replacement for the current _all field.
It now does auto-field-expansion and auto-leniency when the following criteria
are ALL met:
The _all field is disabled
No default_field has been set in the index settings
No fields are specified in the request
Additionally, a user can force the "all-like" execution by setting the
all_fields parameter to true.
When executing in all field mode, the `simple_query_string` query will
look at all the fields in the mapping that are not metafields and can be
searched, and automatically expand the list of fields that are going to
be queried.
Relates to #20925, which is the `query_string` version of this work.
This is basically the same behavior, but for the `simple_query_string`
query.
Relates to #19784
Null safe dereferences make handling null or missing values shorter.
Compare without:
```
if (ctx._source.missing != null && ctx._source.missing.foo != null) {
ctx._source.foo_length = ctx.source.missing.foo.length()
}
```
To with:
```
Integer length = ctx._source.missing?.foo?.length();
if (length != null) {
ctx._source.foo_length = length
}
```
Combining this with the as of yet unimplemented elvis operator allows
for very concise defaults for nulls:
```
ctx._source.foo_length = ctx._source.missing?.foo?.length() ?: 0;
```
Since you have to start somewhere, we started with null safe dereferenes.
Anyway, this is a feature borrowed from groovy. Groovy allows writing to
null values like:
```
def v = null
v?.field = 'cat'
```
And the writes are simply ignored. Painless doesn't support this at this
point because it'd be complex to implement and maybe not all that useful.
There is no runtime cost for this feature if it is not used. When it is
used we implement it fairly efficiently, adding a jump rather than a
temporary variable.
This should also work fairly well with doc values.
This commit removes some references to 5.x that were picked up when the
migration docs for the cat API were migrated from 5.x to master.
Relates #21342
This commit adds migration docs for the cat API, including a note
regarding the change in response in the cat thread pool API for
unbounded queue sizes.
Relates #21342
We plan to deprecate `_suggest` during 5.0 so it isn't worth fixing
it to support the `_source` parameter for `_source` filtering. But we
should fix the docs so they are accurate.
Since this removes the last non-`// CONSOLE` line in
`completion-suggest.asciidoc` this also removes it from the list of
files that have non-`// CONSOLE` docs.
Closes#20482
Adds support for `?slices=N` to reindex which automatically
parallelizes the process using parallel scrolls on `_uid`. Performance
testing sees a 3x performance improvement for simple docs
on decent hardware, maybe 30% performance improvement
for more complex docs. Still compelling, especially because
clusters should be able to get closer to the 3x than the 30%
number.
Closes#20624
Exist requests are supposed to never throw an exception, but rather return true or false depending on whether some resource exists or not. Indices exists does that for indices and accepts wildcard expressions too. The way the api works internally is by resolving indices and catching IndexNotFoundException: if an exception is thrown the index does not exist hence it returns false, otherwise it returns true. That works ok only if ignore_unavailable and allow_no_indices indices options are both set to false, meaning that they are strict and any missing index or wildcard expressions that resolves to no indices will lead to an exception that can be thrown and cause false to be returned.
Unfortunately the indices options have been configurable up until now for this request, meaning that one can set ignore_unavailable or allow_no_indices to true and have the indices exist request return true for indices that really don't exist, which makes very little sense in the context of this api.
This commit removes the indicesOptions setter from the IndicesExistsRequest and makes settable only expandWildcardsOpen and expandWildcardsClosed, hence a subset of the available indices options. This way we can guarantee more consistent behaviour of the indices exists api. We can then remove the ignore_unavailable and allow_no_indices option from indices exists api spec
Moves the `_flush` in the `_cat/indices` snippets testing framework
to the very first test. We need to flush super early because index
size is cached for a few seconds so we really need to read a
consistent size on the first read so we can sort by it properly.
Closes#21062
This commit introduces a new execution mode for the query_string query, which
is intended down the road to be a replacement for the current _all field.
It now does auto-field-expansion and auto-leniency when the following criteria
are ALL met:
The _all field is disabled
No default_field has been set in the index settings
No default_field has been set in the request
No fields are specified in the request
Additionally, a user can force the "all-like" execution by setting the
all_fields parameter to true.
When executing in all field mode, the query_string query will look at all the
fields in the mapping that are not metafields and can be searched, and
automatically expand the list of fields that are going to be queried.
Relates to #19784
The important settings docs previously referred to a section regarding
the node.max_local_storage_nodes setting. This section was removed, but
the link was not. This commit removes that link.
Previously node.max_local_storage_nodes defaulted to fifty, and this
permitted users to start multiple instances of Elasticsearch sharing the
same data folder. This can be dangerous, and usually it does not make
sense to run more than one instance of Elasticsearch on a single
server. Because of this, we had a note in the important settings docs
advising users to set this setting to one. However, we have since
changed the default value of this setting to one so this advise is no
longer needed.
Relates #21305
This query is deprecated from 5.0 on. Similar to IndicesQueryBuilder we should
log a deprecation warning whenever this query is used.
Relates to #15760
Lucene 6.2 introduces the new `Analyzer.normalize` API, which allows to apply
only character-level normalization such as lowercasing or accent folding, which
is exactly what is needed to process queries that operate on partial terms such
as `prefix`, `wildcard` or `fuzzy` queries. As a consequence, the
`lowercase_expanded_terms` option is not necessary anymore. Furthermore, the
`locale` option was only needed in order to know how to perform the lowercasing,
so this one can be removed as well.
Closes#9978
This change adds an option called `split_on_whitespace` which prevents the query parser to split free text part on whitespace prior to analysis. Instead the queryparser would parse around only real 'operators'. Default to true.
For instance the query `"foo bar"` would let the analyzer of the targeted field decide how the tokens should be splitted.
Some options are missing in this change but I'd like to add them in a follow up PR in order to be able to simplify the backport in 5.x. The missing options (changes) are:
* A `type` option which similarly to the `multi_match` query defines how the free text should be parsed when multi fields are defined.
* Simple range query with additional tokens like ">100 50" are broken when `split_on_whitespace` is set to false. It should be possible to preserve this syntax and make the parser aware of this special syntax even when `split_on_whitespace` is set to false.
* Since all this options would make the `query_string_query` very similar to a match (multi_match) query we should be able to share the code that produce the final Lucene query.
* Add docs with up to date instructions on updating default similarity
The default similarity can no longer be set in the configuration file
(you will get an error on startup). Update the docs with the method
that works.
* Add instructions for changing similarity on index creation
It was 10mb and that was causing trouble when folks reindex-from-remoted
with large documents.
We also improve the error reporting so it tells folks to use a smaller
batch size if they hit a buffer size exception. Finally, adds some docs
to reindex-from-remote mentioning the buffer and giving an example of
lowering the size.
Closes#21185
Refactored ScriptType to clean up some of the variable and method names. Added more documentation. Deprecated the 'in' ParseField in favor of 'stored' to match the indexed scripts being replaced by stored scripts.
Adds support for indexing into lists and arrays with negative
indexes meaning "counting from the back". So for if
`x = ["cat", "dog", "chicken"]` then `x[-1] == "chicken"`.
This adds an extra branch to every array and list access but
some performance testing makes it look like the branch predictor
successfully predicts the branch every time so there isn't a
in execution time for this feature when the index is positive.
When the index is negative performance testing showed the runtime
is the same as writing `x[x.length - 1]`, again, presumably thanks
to the branch predictor.
Those performance metrics were calculated for lists and arrays but
`def`s get roughly the same treatment though instead of inlining
the test they need to make a invoke dynamic so we don't screw up
maps.
Closes#20870
Lucene 6.3 is expected to be released in the next weeks so it'd be good to give
it some integration testing. I had to upgrade randomized-testing too so that
both Lucene and Elasticsearch are on the same version.
Converts docs for `_cat/segments`, `_cat/plugins` and `_cat/repositories`
from `curl` to `// CONSOLE` so they are tested as part of the build and
are cleaner to use in Console. They should work fine with `curl` with
the `COPY AS CURL` link.
Also swaps the `source` type of the response from `js` to `txt` because
that is more correct. The syntax highlighter doesn't care. It looks at
the text to figure out the language. So it looks a little funny for `_cat`
responses regardless.
Relates to #18160
On some systems, cgroups will be available but not configured. And in
some cases, cgroups will be configured, but not for the subsystems that
we are expecting (e.g., cpu and cpuacct). This commit strengthens the
handling of cgroup stats on such systems.
Relates #21094
This change adds a TypesQuery that checks if the disjunction of types should be rewritten to a MatchAllDocs query. The check is done only if the number of terms is below a threshold (16 by default and configurable via max_boolean_clause).
This allows you to whitelist `localhost:*` or `127.0.10.*:9200`.
It explicitly checks for patterns like `*` in the whitelist and
refuses to start if the whitelist would match everything. Beyond
that the user is on their own designing a secure whitelist.
This commit fixes two issues with the slow log docs:
- clarifies that these settings are per index
- updates index slow log configuration for Log4j 2
Relates #20976
It is important that folks understand that snapshot/restore isn't
for archiving. It is appropriate for backup and disaster recovery
but not for archival over long periods of time because of version
incompatibility.
Closes#20866
Relates to #18160
Uses the new sorting (#20658) in the `_cat` API to support all use
cases natively. We can still resort to piping things through `sort`
if we need to, but we don't have to for basic stuff like sorting!
* Adding built-in sorting capability to _cat apis.
Closes#16975
* addressing pr comments
* changing value types back to original implementation and fixing cosmetic issues
* Changing compareTo, hashCode of value types to a better implementation
* Changed value compareTos to use Double.compare instead of if statements + fixed some failed unit tests
The shards preference on a search request enables specifying a list of
shards to hit, and then a secondary preference (e.g., "_primary") can be
added. Today, the separator between the shards list and the secondary
preference is ';'. Unfortunately, this is also a valid separtor for URL
query parameters. This means that a preference like "_shards:0;_primary"
will be parsed into two URL parameters: "_shards:0" and "_primary". With
the recent change to strict URL parsing, the second parameter will be
rejected, "_primary" is not a valid URL parameter on a search
request. This means that this feature has never worked (unless the ';'
is escaped, but no one does that because our docs do not that, and there
was no indication from Elasticsearch that this did not work). This
commit changes the separator to '|'.
Relates #20786
This change proposes the removal of all non-tcp transport implementations. The
mock transport can be used by default to run tests instead of local transport that has
roughly the same performance compared to TCP or at least not noticeably slower.
This is a master only change, deprecation notice in 5.x will be committed as a
separate change.
Previously, this doc was using a field called "content". This is
confusing, especially when the doc starts talking about the content of
the content field. This change makes the field name "comment" which
is less ambiguous and also changes some related field names in the doc
to make a consistent example theme of editing docs around blog posts.
Adrien Grand
Trey Tacon
Chris Fritz
Jeffery Bradberry
Shubham Aggarwal
Nik Everett
Sakthipriyan Vairamani
Luca Wintergerst
Jason Tedor
Ryan Ernst
Dimitrios Liappis
David Pilato
Tal Levy
Christoph Büscher
Lee Hinman
Clinton Gormley
Lee Hinman
Bryan Karlovitz
Boaz Leskes
Sumit Gupta
Alexander Lin
lslxdx
javanna
Joeyn414
markharwood
Loek van Gool
Luca Cavanna
Chris Earle
Jim Ferenczi
Adriel Dean-Hall
Craig Squire
LakumiNarayanan
Jack Conradson
Stanislav Mamontov
Jun Ohtani
Colin Goodheart-Smithe
Igor Motov
Praveen Shukla
Chris Earle
Joshua Rich
Quinn Shanahan
Joshua Rich
Thibaud BARDIN
Robin Clarke
Pascal Borreli
Lucas Bremgartner
Shane Connelly
Simon Willnauer