Currently replication and recovery are both coordinated through the latest cluster state available on the ClusterService as well as through the GlobalCheckpointTracker (to have consistent local/global checkpoint information), making it difficult to understand the relation between recovery and replication, and requiring some tricky checks in the recovery code to coordinate between the two. This commit makes the primary the single owner of its replication group, which simplifies the replication model and allows to clean up corner cases we have in our recovery code. It also reduces the dependencies in the code, so that neither RecoverySourceXXX nor ReplicationOperation need access to the latest state on ClusterService anymore. Finally, it gives us the property that in-sync shard copies won't receive global checkpoint updates which are above their local checkpoint (relates #25485).
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.
This change refactors the query_string query to analyze the query text around logical operators of the query string the same way than a match_query/multi_match_query.
It also adds a type parameter that can be used to change the way multi fields query are built the same way than a multi_match query does.
Now that these queries share the same behavior regarding text analysis, some parameters are obsolete and have been deprecated:
split_on_whitespace: This setting is now ignored with a deprecation notice
if it is used explicitely. With this PR The query_string always splits on logical operator.
It simplifies the understanding of the other parameters that can have different meanings
depending on the value of split_on_whitespace.
auto_generate_phrase_queries: This setting is now ignored with a deprecation notice
if it is used explicitely. This setting only makes sense when the parser splits on whitespace.
use_dismax: This setting is now ignored with a deprecation notice
if it is used explicitely. The tie_breaker parameter is sufficient to handle best_fields/most_fields.
Fixes#25574
With cross cluster search we can potentially proxy `can_match` requests
to nodes that don't have the endpoint. This might not cause any problem
from a functional perspecitve but will cause ugly error messages on
the target node. This commit will cause an IAE if we try to talk to an
incompatible node via a proxy.
Relates to #25704
It was brought up that our current client artifacts have generic names like 'rest' that may cause conflicts with other artifacts.
This commit renames:
- rest -> elasticsearch-rest-client
- sniffer -> elasticsearch-rest-client-sniffer
- rest-high-level -> elasticsearch-rest-high-level-client
A couple of small changes are also preparing the high level client for its first release.
Closes#20248
The slop parameter defaults to 0 in the Lucene SpanNearQuery, so we can set it
to this default value also and don't have to require it being specified in the
query when using the Rest API. Leaving `slop` a ctro arg in the Java API as it
should normally be specified and we can keep it `final` that way.
Closes#25642
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.
Requests that execute a stored script will no longer be allowed to specify the lang of the script. This information is stored in the cluster state making only an id necessary to execute against. Putting a stored script will still require a lang.
* Changes DocValueFieldsFetchSubPhase to reuse doc values iterators for multiple hits
Closes#24986
* iter
* Update ScriptDocValues to not reuse GeoPoint and Date objects
* added Javadoc about script value re-use
* Enable doc values for range fields by default.
* Store ranges in a binary format that support multi field fields.
* Added BinaryDocValuesRangeQuery that can query ranges that have been encoded into a binary doc values field.
* Wrap range queries on a range field in IndexOrDocValuesQuery query.
Closes#24314
This method does exactly what getHits() does and is used in only a few places,
so it can safely be removed. It seems to be a left-over from when
InternalSearchHits was folded into the SearchHits interface, which didn't
contain this method.
In certain situations we can early terminate and just skip the entire
query phase or make the lucene level rewrite very cheap if we can already
tell that a query won't match any documents. For instance if there is a single
`match_none` ie. due to some range rewrite in a filter or must clause of a boolean
query it can just drop all it's other queries since it will never match.
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.
There is a bug when a call to `BytesReferenceStreamInput` skip is made
on a `BytesReference` that has an initial offset. The offset for the
current slice is added to the current index and then subtracted from the
length. This introduces the possibility of a negative number of bytes to
skip. This happens inside a loop, which leads to an infinte loop.
This commit correctly subtracts the current slice index from the
slice.length. Additionally, the `BytesArrayTests` are modified to test
instances that include an offset.
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.
We lost the cluster alias due to some special caseing in inner hits
and due to the fact that we didn't pass on the alias to the shard request.
This change ensures that we have the cluster alias present on the shard to
ensure all SearchShardTarget reads preserve the alias.
Relates to #25606
Currently when we close a channel in Netty4Utils.closeChannels we
block until the closing is complete. This introduces the possibility
that a network selector thread will block while waiting until a
separate network selector thread closes a channel.
For instance: T1 closes channel 1 (which is assigned to a T1 selector).
Channel 1's close listener executes the closing of the node. That
means that T1 now tries to close channel 2. However, channel 2 is
assigned to a selector that is running on T2. T1 now must wait until T2
closes that channel at some point in the future.
This commit addresses this by adding a boolean to closeChannels
indicating if we should block on close. We only set this boolean to true
if we are closing down the server channels at shutdown. This call is
never made from a network thread. When we call the closeChannels method
with that boolean set to false, we do not block on close.
With #24236, tribe nodes submit cluster state changes to their MasterService, making it unnecessary to explicitly update the cluster state version. This PR fixes the double-incrementing of cluster state versions on tribe nodes, which are not harmful, but unnecessary.
This change collapses some of the packages for the bucket aggregations into their parent packages. This was done for the following aggregations:
* The variants of the range aggregation (geo_distance, date and ip) were moved into the `o.e.s.a.bucket.range` package
* The `o.e.s.a.bucket.terms.support` package was removed and the classes were moved to `o.e.s.a.bucket.terms`
* The filter aggregation was moved to `o.e.s.a.bucket.filter`
Since this PR is already relatively large with only the above changes subsequent PRs will do similar operations on relevant metric and pipeline aggregations
Relates to #22868
The test is currently serializing the cluster state using an older ES version format, but then deserializes those same bytes by
assuming they are of the current ES version.
When resolving wildcards, aliases should be treated as unavailable indices when the `ignoreAliases` option is set to `true` (currently enabled with delete index api and update aliases api). This way the `allow_no_indices` and `ignore_unavailable` options can be honoured, otherwise WildcardExpressionResolver ends up treating aliases differently and there is no way to control when an error is thrown.
The default behaviour for the delete index api, which has `ignore_unavailable` set to `false` and `allow_no_indices` set to `true` by default, is to throw an error when executed against an alias, same as when it's executed against an index that does not exist.
We currently check whether translog files can be trimmed whenever we create a new translog generation or close a view. However #25294 added a long translog retention period (12h, max 512MB by default), which means translog files should potentially be cleaned up long after there isn't any indexing activity to trigger flushes/the creation of new translog files. We therefore need a scheduled background check to clean up those files once they are no longer needed.
Relates to #10708
This commit does two things:
- bumps the version from 6.0.0-alpha3 to 6.0.0-beta1
- renames the 6.0.0-alpha3 version constant to 6.0.0-beta1
Relates #25621
This commit adjusts the expectation for the max number of threads in the
scaling thread pool configuration test. The reason that this expectation
is incorrect is because we removed the limitation that the number of
processors maxes out at 32, instead letting it be the true number of
logical processors on the machine. However, when we removed this
limitation, this test was never adjusted to reflect the new reality yet
it never arose since our tests were not running on machines with
incredibly high core counts.
Relates #20874
Updating the global checkpoint on a replica can occur for a few
different reasons:
- from inlined global checkpoint updates
- from a primary term transition
- from finalizing recovery
Yet, the trace logging for a global checkpoint update does not present
this information that can be useful when tracing test failures. This
commit adds a reason for the global checkpoint update on a replica so
that we can trace these updates.
Relates #25612
The current BWC code in `BulkItemRequest` mutates the underlying `DocWriteRequests` which causes test failures and unexpected state (our test infra checks bwc serialization on the fly). This PR removes this logic from master. Another PR will add a BWC layer to 5.x only.
This PR contains the logic in https://github.com/elastic/elasticsearch/pull/25510 , which is needed to run the tests.
Previously the primary didn't update it's own local checkpoint (and thus the global checkpoint) before some indexing occurred. With recent changes the primary now properly initializes it self and thus ops recovery is possible even if no indexing has occurred.
This commit adds cross-settings validation for the low/high/flood stage
disk watermark settings. This validation was enabled by the introduction
of multiple settings validation.
Relates #25600
When a shard is promoted to replica, it's possible that it was
previously a replica that started following a new primary. When it
started following this new primary, the state of its local checkpoint
tracker was reset. Upon promotion, it's possible that the state of the
local checkpoint tracker has not yet restored from a successful
primary-replica re-sync. To account for this, we must restore the state
of the local checkpoint tracker when a replica shard is promoted to
primary. To do this, we stream the operations in the translog, marking
the operations that are in the translog as completed. We do this before
we fill the gaps on the newly promoted primary, ensuring that we have a
primary shard with a complete history up to the largest maximum sequence
number it has ever seen.
Relates #25553
This commit refactors the global checkpont tracker to make it more
resilient. The main idea is to make it more explicit what state is
actually captured and how that state is updated through
replication/cluster state updates etc. It also fixes the issue where the
local checkpoint information is not being updated when a shard becomes
primary. The primary relocation handoff becomes very simple too, we can
just verbatim copy over the internal state.
Relates #25468
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
* Improved REST endpoint exception handling, see #15335
Also improved OPTIONS http method handling to better conform with the
http spec.
* Tidied up formatting and comments
See #15335
* Tests for #15335
* Cleaned up comments, added section number
* Swapped out tab indents for space indents
* Test class now extends ESSingleNodeTestCase
* Capture RestResponse so it can be examined in test cases
Simple addition to surface the RestResponse object so we can run tests
against it (see issue #15335).
* Refactored class name, included feedback
See #15335.
* Unit test for REST error handling enhancements
Randomizing unit test for enhanced REST response error handling. See
issue #15335 for more details.
* Cleaned up formatting
* New constructor to set HTTP method
Constructor added to support RestController test cases.
* Refactored FakeRestRequest, streamlined test case.
* Cleaned up conflicts
* Tests for #15335
* Added functionality to ignore or include path wildcards
See #15335
* Further enhancements to request handling
Refactored executeHandler to prioritize explicit path matches. See
#15335 for more information.
* Cosmetic fixes
* Refactored method handlers
* Removed redundant import
* Updated integration tests
* Refactoring to address issue #17853
* Cleaned up test assertions
* Fixed edge case if OPTIONS method randomly selected as invalid method
In this test, an OPTIONS method request is valid, and should not return
a 405 error.
* Remove redundant static modifier
* Hook the multiple PathTrie attempts into RestHandler.dispatchRequest
* Add missing space
* Correctly retrieve new handler for each Trie strategy
* Only copy headers to threadcontext once
* Fix test after REST header copying moved higher up
* Restore original params when trying the next trie candidate
* Remove OPTIONS for invalidHttpMethodArray so a 405 is guaranteed in tests
* Re-add the fix I already added and got removed during merge :-/
* Add missing GET method to test
* Add documentation to migration guide about breaking 404 -> 405 changes
* Explain boolean response, pull into local var
* fixup! Explain boolean response, pull into local var
* Encapsulate multiple HTTP methods into PathTrie<MethodHandlers>
* Add PathTrie.retrieveAll where all matching modes can be retrieved
Then TrieMatchingMode can be package private and not leak into RestController
* Include body of error with 405 responses to give hint about valid methods
* Fix missing usageService handler addition
I accidentally removed this :X
* Initialize PathTrieIterator modes with Arrays.asList
* Use "== false" instead of !
* Missing paren :-/
Indexing ids in binary form should help with indexing speed since we would
have to compare fewer bytes upon sorting, should help with memory usage of
the live version map since keys will be shorter, and might help with disk
usage depending on how efficient the terms dictionary is at compressing
terms.
Since we can only expect base64 ids in the auto-generated case, this PR tries
to use an encoding that makes the binary id equal to the base64-decoded id in
the majority of cases (253 out of 256). It also specializes numeric ids, since
this seems to be common when content that is stored in Elasticsearch comes
from another database that uses eg. auto-increment ids.
Another option could be to require base64 ids all the time. It would make things
simpler but I'm not sure users would welcome this requirement.
This PR should bring some benefits, but I expect it to be mostly useful when
coupled with something like #24615.
Closes#18154
Adds a unit test that checks the TermSuggestionContext contents that is the result
of TermSuggestionBuilder#build vs. the values the original builder contains.
Transport profiles unfortunately have never been validated. Yet, it's very
easy to make a mistake when configuring profiles which will most likely stay
undetected since we don't validate the settings but allow almost everything
based on the wildcard in `transport.profiles.*`. This change removes the
settings subset based parsing of profiles but rather uses concrete affix settings
for the profiles which makes it easier to fall back to higher level settings since
the fallback settings are present when the profile setting is parsed. Previously, it was
unclear in the code which setting is used ie. if the profiles settings (with removed
prefixes) or the global node setting. There is no distinction anymore since we don't pull
prefix based settings.
This change adds validation to the RemoteClusterConnection to ensure
we always use seed nodes from the same cluster. While we still allow to use
an arbitrary cluster alias we ensure that we, once we connected to a cluster the first time,
we always check against that initial cluster name when we execute a seed node handshake.
sequence number data in Lucene commit points. Instead, the test
retrieves the _seq_no value from the commit point directly and converts
it to a Long value.
This change adds a basic unit test for the SuggestionSearchContext that is
created as output of SuggestionBuilder#build. The current test only adds checks
for the common fields (like text, prefix, fieldName etc...).
Relates to #17118
* Refactor PathTrie and RestController to use a single trie for all methods
This changes `PathTrie` and `RestController` to use a single `PathTrie` for all
endpoints, it also allows retrieving the endpoints' supported HTTP methods more
easily.
This is a spin-off and prerequisite of #24437
* Use EnumSet instead of multiple if conditions
* Make MethodHandlers package-private and final
* Remove duplicate registerHandler method
* Remove public modifier
Today when we run out of disk all kinds of crazy things can happen
and nodes are becoming hard to maintain once out of disk is hit.
While we try to move shards away if we hit watermarks this might not
be possible in many situations. Based on the discussion in #24299
this change monitors disk utilization and adds a flood-stage watermark
that causes all indices that are allocated on a node hitting the flood-stage
mark to be switched read-only (with the option to be deleted). This allows users to react on the low disk
situation while subsequent write requests will be rejected. Users can switch
individual indices read-write once the situation is sorted out. There is no
automatic read-write switch once the node has enough space. This requires
user interaction.
The flood-stage watermark is set to `95%` utilization by default.
Closes#24299
This commit causes a replica to throwback its local checkpoint to the
global checkpoint when learning of a new primary through a replica
operation.
Relates #25452
In 6.x we prevent multiple types and default to `index.mapping.single_type: false`
This change removes the registered setting and ensures that it's preserved for
5.x indices.
Relates to #24961
All query builders written as self contained xContent objects, to we should mark
them accordingly using ToXContentObject. This also makes it possible to use
things like XContentHelper#toXContent to render query builders in tests.
* 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
The constructor using `types` has been deprecated for a while now (starting with
ES 5.1.). It can be removed in the next mayor version. Since types are optional
they should be added with the #types() setter.
* Adds check for negative search request size
This change adds a check to `SearchSourceBuilder` to throw and exception if the size set on it is set to a negative value.
Closes#22530
* fix error in reindex
* update re-index tests
* Addresses review comment
* Fixed tests
* Added random negative size test
* Fixes test
QueryParseContext is currently only used as a wrapper for an XContentParser, so
this change removes it entirely and changes the appropriate APIs that use it so
far to only accept a parser instead.
We have two ways to filter XContent:
- The first method is to parse the XContent as a map and use
XContentMapValues.filter(). This method filters the content of the map
using an automaton. It is used for source filtering, both at search and
indexing time. It performs well but can generate a lot of objects and
garbage collections when large XContent are filtered. It also returns
empty objects (see f2710c16eb) when all
the sub fields have been filtered out and handle dots in field names as
if they were sub fields.
- The second method is to parse the XContent and copy the XContentParser
structure to a XContentBuilder initialized with includes/excludes
filters. This method uses the Jackson streaming filter feature. It is
used by the Response Filtering ('filter_path') feature. It does not
generate a lot of objects, and does not return empty objects and also
does not handle dots in field names explicitely.
Both methods have similar goals but different tests. This commit changes
the current XContentBuilder test class so that it becomes a more generic
testing class and we can now ensure that filtering methods generate the
same results.
It also removes some tests from the XContentMapValuesTests class that
should be in XContentParserTests.
The significance aggs return Lucene index-level statistics that when merged are assumed to be from different shards. The Aggregator unit tests assume segments can be treated as shards and thus break the significance stats and introduce double-counting of background doc frequencies. This change addresses this problem by ensuring test indexes have only one shard.
Closes#25429
If all nodes get disconnected before we can send the request we might
try to reconnect and that will fail with an ISE instead of the a transport
exception.
Closes#25301
ensureYellow ensures at least yellow.
Also, since we only have 1 replica, we don't need to index for it to know about the primary term promotion
Closes#25287
This commit makes the use of the global network settings explicit instead
of implicit within NetworkService. It cleans up several places where we fall
back to the global settings while we should have used tcp or http ones.
In addition this change also removes unnecessary settings classes
The replica replication response object has an extra allocationId field that contains the allocation id of the replica on which the request was executed. As we are sending the allocation id with the actual replica replication request, and check when executing the replica replication action that the allocation id of the replica shard is what we expect, there is no need to communicate back the allocation id as part of the response object.
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
This commit adds a test for a scenario where a replica receives an extra
document that the promoted replica does not receive, misses the
primary/replica re-sync, and the recovers from the newly-promoted
primary.
Relates #25493
Failing to do so can cause other errors later on during query execution.
For example if `WrapperQueryBuilder` wraps a `GeoShapeQueryBuilder` that fetches the shape from an index then it will skip the shape fetching
and fail later with the error that no shapes have been fetched.
This commit adds an LRU set to used to determine if a keyed deprecation
message should be written to the deprecation logs, or only added to the
response headers on the thread context.
Relates #25474
We have various assertions that check we never block on transport
threads. This commit adds the thread names for the NioTransport to
these assertions.
With this change I had to fix two places where we were calling blocking
methods from the transport threads.
Currently QueryParseContext is only a thin wrapper around an XContentParser that
adds little functionality of its own. I provides helpers for long deprecated
field names which can be removed and two helper methods that can be made static
and moved to other classes. This is a first step in helping to remove
QueryParseContext entirely.
* Promote replica on the highest version node
This changes the replica selection to prefer to return replicas on the highest
version when choosing a replacement to promote when the primary shard fails.
Consider this situation:
- A replica on a 5.6 node
- Another replica on a 6.0 node
- The primary on a 6.0 node
The primary shard is sending sequence numbers to the replica on the 6.0 node and
skipping sending them for the 5.6 node. Now assume that the primary shard fails
and (prior to this change) the replica on 5.6 node gets promoted to primary, it
now has no knowledge of sequence numbers and the replica on the 6.0 node will be
expecting sequence numbers but will never receive them.
Relates to #10708
* Switch from map of node to version to retrieving the version from the node
* Remove uneeded null check
* You can pretend you're a functional language Java, but you're not fooling me.
* Randomize node versions
* Add test with random cluster state with multiple versions that fails shards
* Re-add comment and remove extra import
* Remove unneeded stuff, randomly start replicas a few more times
* Move test into FailedNodeRoutingTests
* Make assertions actually test replica version promotion
* Rewrite test, taking Yannick's feedback into account
When a setting is deprecated, if that setting is used repeatedly we
currently emit a deprecation warning every time the setting is used. In
cases like hitting settings endpoints over and over against a node with
a lot of deprecated settings, this can lead to excessive deprecation
warnings which can crush a node. This commit ensures that a given
setting only sees deprecation logging at most once.
Relates #25457
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.
This commit fixes a race condition in the node supplier used by the RemoteClusterConnection. The
node supplier stores an iterator over a set backed by a ConcurrentHashMap, but the get operation
of the supplier uses multiple methods of the iterator and is suceptible to a race between the
calls to hasNext() and next(). The test in this commit fails under the old implementation with a
NoSuchElementException. This commit adds a wrapper object over a set and a iterator, with all methods
being synchronized to avoid races. Modifications to the set result in the iterator being set to null
and the next retrieval creates a new iterator.
This commit changes how we determine if there were any remote indices that a search should have
been executed against. Previously, we used the list of remote shard iterators but if the remote
index pattern resolved to no indices there would be no remote shard iterators even though the
request specified remote indices. The map of remote cluster names to the original indices is used
instead so that we can determine if there were remote indices even when there are no remote shard
iterators.
Closes#25426
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 commit introduces a nio based tcp transport into framework for
testing.
Currently Elasticsearch uses a simple blocking tcp transport for
testing purposes (MockTcpTransport). This diverges from production
where our current transport (netty) is non-blocking.
The point of this commit is to introduce a testing variant that more
closely matches the behavior of production instances.
This catches `AlreadyClosedException` during `stats` calls to avoid failing a `_nodes/stats` request because of the ignorable, concurrent index closure.
When relocating a shard before changing the state to relocated, we
verify that a relocation is a still taking place. Yet, this can throw an
exception if the relocation is in fact no longer valid. Sadly, we were
swallowing the exception in this situation. This commit allows such an
exception to bubble up after safely releasing resources.
We previously tried to maintain (while not formally supporting) 32-bit
support, although we never tested this anywhere in CI. Since we do not
formally support this, and 32-bit usage is very low, we have elected to
no longer maintain 32-bit support. This commit removes any implication
of 32-bit support.
Relates #25435
The primary shard uses the GlobalCheckPointTracker to track local checkpoint information of recovering and started replicas in order to calculate the global checkpoint. As the tracker is updated through recoveries as well, it is easier to reason about the tracker if we can ensure that there are no concurrent recovery attempts for the same target shard (which can happen in case of network disconnects).
When a replica shard increases its primary term under the mandate of a new primary, it should also update its global checkpoint; this gives us the guarantee that its global checkpoint is at least as high as the new primary and gives a starting point for the primary/replica resync.
Relates to #25355, #10708
We already have these tests in InternalAggregationTestCase to check random insertions into the response xContent so that we don't fail on future changes in the response format. This change adds the same to AggregationsTests and runs on a whole aggregations tree. Unfortunately we need to exclude many places in the xContent from random insertion, but I added a long comment trying to explaine those.
This commit marks a failing test as awaits fix. The test is failing due
to a primary shard not knowing its own local checkpoint in the global
checkpoint tracker after recovery. If such a shard becomes primary after
promotion, and is then subsequently relocated, it can lead to a
violation of an assertion that when the primary context is transferred
the knowledge of all in-sync local checkpoints is consistent with the
global checkpoint on the relocation target.
Relates #25415
This commit removes the default path settings for data and logs. With
this change, we now ship the packages with these settings set in the
elasticsearch.yml configuration file rather than going through the
default.path.data and default.path.logs dance that we went through in
the past.
Relates #25408
Today we load plugins reflectively, looking for constructors that
conform to specific signatures. This commit tightens the reflective
operations here, not allowing plugins to have ambiguous constructors.
Relates #25405
This commit removes path.conf as a valid setting and replaces it with a
command-line flag for specifying a non-default path for configuration.
Relates #25392
This commit removes an abstraction that was introduced when introducing
the primary context. As this abstraction is used in exactly one place,
we simply make that abstraction local to its usage so that we do not
accumulate yet another general abstraction with exactly one usage.
Relates #25402
This commit updates some assertions in the primary context sealing test
after the restriction on updating allocation IDs from master and
updating global checkpoint on replica while sealed were removed.
* Introduce primary context
The target of a primary relocation is not aware of the state of the
replication group. In particular, it is not tracking in-sync and
initializing shards and their checkpoints. This means that after the
target shard is started, its knowledge of the replication group could
differ from that of the relocation source. In particular, this differing
view can lead to it computing a global checkpoint that moves backwards
after it becomes aware of the state of the entire replication
group. This commit addresses this issue by transferring a primary
context during relocation handoff.
* Fix test
* Add assertion messages
* Javadocs
* Barrier between marking a shard in sync and relocating
* Fix misplaced call
* Paranoia
* Better latch countdown
* Catch any exception
* Fix comment
* Fix wait for cluster state relocation test
* Update knowledge via upate local checkpoint API
* toString
* Visibility
* Refactor permit
* Push down
* Imports
* Docs
* Fix compilation
* Remove assertion
* Fix compilation
* Remove context wrapper
* Move PrimaryContext to new package
* Piping for cluster state version
This commit adds piping for the cluster state version to the global
checkpoint tracker. We do not use it yet.
* Remove unused import
* Implement versioning in tracker
* Fix test
* Unneeded public
* Imports
* Promote on our own
* Add tests
* Import
* Newline
* Update comment
* Serialization
* Assertion message
* Update stale comment
* Remove newline
* Less verbose
* Remove redundant assertion
* Tracking -> in-sync
* Assertions
* Just say no
Friends do not let friends block the cluster state update thread on
network operations.
* Extra newline
* Add allocation ID to assertion
* Rename method
* Another rename
* Introduce sealing
* Sealing tests
* One more assertion
* Fix imports
* Safer sealing
* Remove check
* Remove another sealed check
The following token filters were moved: stemmer, stemmer_override, kstem, dictionary_decompounder, hyphenation_decompounder, reverse, elision and truncate.
Relates to #23658
While real secure settings (ie an ES keystore) cannot be merged
together, mocked secure settings can and need to be sometimes merged.
This commit adds a merge method to allow tests to merge together
multiple instances of secure settings.
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
When Log4j 2 was introduced, we removed support for the system property
es.logger.prefix. Yet, some code was left behind. This commit removes
that dead code.
Relates #25377
Added unit test coverage for GlobalOrdinalsSignificantTermsAggregator, GlobalOrdinalsSignificantTermsAggregator.WithHash, SignificantLongTermsAggregator and SignificantStringTermsAggregator.
Removed integration test.
Relates #22278
This change cleans up remaining tests to not use index.mapping.single_type=false
but instead where applicable use a single type or markt the index as created
with a pre 6.x version.
Yet, there is still on leftover in the client tests that needs special attention.
See `org.elasticsearch.client.SearchIT`
Relates to #24961
OldIndexBackwardsCompatibilityIT#testOldClusterStates tested whether global and index metadata could be read from data directory,
this can also be tested in full cluster qa test that checks cluster state via api.
Relates to #24939
`InternalEngineTests.testConcurrentWritesAndCommits` can be very heavy on disks
if threads are slow and the main thread keeps on pulling commit points holding on
to many many segments. This commit adds some quadratic backoff to not pile up too many
commits and to make sure indexing threads can make progress. This also now doesn't do
busy waiting but waits on a latch with a timeout.
Closes#25110
In #24379 we added ability to upgrade templates on full cluster startup. This PR invokes the same update procedure also when a new node first joins the cluster allowing to update templates on a rolling cluster restart as well.
Closes#24680
When shrinking an index we initialize its max unsafe auto ID timestamp
to the maximum of the max unsafe auto ID timestamps on the source
shards.
Relates #25356
#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
This change cleans up core tests to not use `index.mapping.single_type=false`
but instead where applicable use a single type or markt the index as created
with a pre 6.x version.
Relates to #24961
Due to limitations with CreateProcessW on Windows (ultimately used by
ProcessBuilder) with respect to maximum path lengths, we need to get the
short path name for any native controllers before trying to start them
in case the absolute path exceeds the maximum path length. This commit
uses JNA to invoke the necessary Windows API for this to start the
native controller using the short path.
To be precise about the limitation here, the MSDN docs for
CreateProcessW say for the command line parameter:
>The command line to be executed. The maximum length of this string is
>32,768 characters, including the Unicode terminating null character. If
>lpApplicationName is NULL, the module name portionof lpCommandLine is
>limited to MAX_PATH characters.
This is exactly how the Windows implementation of Process in the JDK
invokes CreateProcessW: with the executable name (lpApplicationName) set
to NULL.
Relates #25344
Most notable changes:
- better update concurrency: LUCENE-7868
- TopDocs.totalHits is now a long: LUCENE-7872
- QueryBuilder does not remove the boolean query around multi-term synonyms:
LUCENE-7878
- removal of Fields: LUCENE-7500
For the `TopDocs.totalHits` change, this PR relies on the fact that the encoding
of vInts and vLongs are compatible: you can write and read with any of them as
long as the value can be represented by a positive int.
Bringing together shards in a shrunken index means that we need to
address the start of history for the shrunken index. The problem here is
that sequence numbers before the maximum of the maximum sequence numbers
on the source shards can collide in the target shards in the shrunken
index. To address this, we set the maximum sequence number and the local
checkpoint on the target shards to this maximum of the maximum sequence
numbers. This enables correct document-level semantics for documents
indexed before the shrink, and history on the shrunken index will
effectively start from here.
Relates #25321
Ports all of RepositoryUpgradabilityIT to qa:full-cluster-restart and ports as much of RestoreBackwardsCompatIT as possible into qa:full-cluster-restart.
This setting is supposed to ease index upgrades as it allows you
to check for a new setting called `index.internal.version` which
can be used to check before upgrading indices.
If secure settings are closed after the node has been constructed
no key-store access is permitted. We should also try to be as close as possible
to the real behavior if we mock secure settings. This change also adds
the same behavior as bootstrap has to InternalTestCluster to ensure we fail
if we try to read from secure settings after the node has been constructed.
Today when an index is shrunk, the primary terms for its shards start
from one. Yet, this is a problem as the index will already contain
assigned sequence numbers across primary terms. To ensure document-level
sequence number semantics, the primary terms of the target shards must
start from the maximum of all the shards in the source index. This
commit causes this to be the case.
Relates #25307
* [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
I'm still trying to hunt down rare failures in the cancelation tests
for reindex and friends. Here is the latest:
https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+5.x+multijob-unix-compatibility/os=ubuntu/876/console
It doesn't show much, other than that one of the tasks didn't kill
itself when asked to cancel.
So I'm going a bit crazy with debug logging so that the next time this
comes up I can trace exactly what happened.
Additionally, this tweaks the logic around how rethrottles were
performed around cancel. Previously we set the `requestsPerSecond`
to `0` when we cancelled the task. That was the "old way" to set them
to inifity which was the intent. This switches that from `0` to
`Float.MAX_VALUE` which is the "new way" to set the `requestsPerSecond`
to infinity. I don't know that this is much better, but it feels better.
This commit fixes a typo in the KeyStoreCli class. The add-file command was incorrectly set to use
the AddStringKeyStoreCommand instead of the AddFileKeyStoreCommand.
Indexing or deleting documents through the IndexShard interface is quite complex and error-prone. It requires multiple calls, e.g. first prepareIndexOnPrimary, then do some checks if mapping updates have occurred, then do the actual indexing using index(...) etc. Currently each consumer of the interface (local recovery, peer recovery, replication) has additional custom checks built around it to deal with mapping updates, some of which are even inconsistent. This commit aims at reducing the complexity by exposing a simpler interface on IndexShard. There are no more prepare*** methods and the mapping complexity is also hidden, but still giving callers a possibility to implement custom logic to deal with mapping updates.
This commit changes the parsing logic of DocWriteResponse, ReplicationResponse
and GetResult so that it skips any unknown additional fields (for forward compatibility
reasons). This affects the IndexResponse, UpdateResponse,DeleteResponse and
GetResponse objects.
Today we maintain a map of open connections in order to close them when
a low level channel gets closed or handles a failure. We also spawn a thread due to some
tricky concurrency issues especially with respect to netty since they listener might
be called on a transport / boss thread. Executions on those threads must not be blocking
since otherwise we will likely deadlock the event processing which adds to the
complexity of the concurrency model in this class.
This change associates the connection with the close callback that every channel invokes
once it's closed which allows us to remove the connections map. A relaxed non-blocking
concurrency model in the connection close listener allows cleaning up connected nodes without
blocking on any lock.
This test is failing because delete /{index} requests no longer support
index matching an alias. This commit removes testing such requests again
aliases.
Closes#25284
This change adds tests for the aggregation parsing that try to simulate that we
can parse existing aggregations in a forward compatible way in the future,
ignoring potential newly added fields or substructures to the xContent response.
Today TcpTransport is the de-facto base-class for transport implementations.
The need for all the callbacks we have in TransportServiceAdaptor are not necessary
anymore since we can simply have the logic inside the base class itself. This change
moves the stats metrics directly into TcpTransport removing the need for low level
bytes send / received callbacks.
Moves the keyword tokenizer to the analysis-common module. The keyword tokenizer is special because it is used by CustomNormalizerProvider so I pulled it out into its own PR. To get the move to work I've reworked the lookup from static to one using the AnalysisRegistry. This seems safe enough.
Part of #23658.
With #23997 we have introduced a new internal index option that allows to resolve index expressions only against concrete indices while ignoring aliases. Such index option was applied to IndicesAliasesRequest, so that the index part of alias actions would only be resolved against concrete indices.
Same is done in this commit with delete index request. Deleting aliases has always been confusing as some users expect it to only remove the alias from the index (which has its own specific API). Even worse, in case of filtered aliases, deleting an alias may leave users with the expectation that only the documents that match the filter are deleted, which was never the case. To address all this confusion, delete index api works now only against concrete indices. WIldcard expressions will be only resolved against concrete index, as if aliases didn't exist. If one tries to delete against an alias, an IndexNotFoundException will be thrown regardless of whether the alias exists or not, as a concrete index with such a name doesn't exist.
Closes#2318
This PR extends the TranslogDeletionPolicy to allow keeping the translog files longer than what is needed for recovery from lucene. Specifically, we allow specifying the total size of the files and their maximum age (i.e., keep up to 512MB but no longer than 12 hours). This will allow making ops based recoveries more common.
Note that the default size and age still set to 0, maintaining current behavior. This is needed as the other components in the system are not yet ready for a longer translog retention. I will adapt those in follow up PRs.
Relates to #10708
This commit does two things:
1. Adds logging at the DEBUG level for when the index-N blob is
updated.
2. When attempting to delete a snapshot, if the snapshot was not found
in the repository data, an exception is now thrown instead of silently
ignoring the lack of presence of the snapshot in the repository data.
We use assertBusy in many places where the underlying code throw exceptions. Currently we need to wrap those exceptions in a RuntimeException which is ugly.
This commit adds a NamedXContentProvider interface that can
be implemented by plugins or modules using Java's SPI feature
in order to provide additional NamedXContent parsers to external
applications like the Java High Level Rest Client.
At index time Elasticsearch needs to look up the version associated with the
`_id` of the document that is being indexed, which is often the bottleneck for
indexing.
While reviewing the output of the `jfr` telemetry from a Rally benchmark, I saw
that significant time was spent in `ConcurrentHashMap#get` and `ThreadLocal#get`.
The reason is that we cache lookup objects per thread and segment, and for every
indexed document, we first need to look up the cache associated with this
segment (`ConcurrentHashMap#get`) and then get a state that is local to the
current thread (`ThreadLocal#get`). So if you are indexing N documents per
second and have S segments, both these methods will be called N*S times per
second.
This commit changes version lookup to use a cache per index reader rather than
per segment. While this makes cache entries live for less long, we now only need
to do one call to `ConcurrentHashMap#get` and `ThreadLocal#get` per indexed
document.
This snapshot has faster range queries on range fields (LUCENE-7828), more
accurate norms (LUCENE-7730) and the ability to use fake term frequencies
(LUCENE-7854).
This commit renames the needsScores method so as to make it
automatically generatable, based on the name of the `_score` variable
which is available in search scripts. It also adds documentation to
ScriptContext to explain the naming and signature of such methods.
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
* Remove QUERY_AND_FETCH BWC for pre-5.3.0 nodes
This was a BWC layer where we expicitly set the `search_type` to
"query_and_fetch" when a single node is queried on pre-5.3 nodes. Since 6.0 no
longer needs to be compatible with 5.3 nodes, this can be removed.
* Fix indentation
* Remove unused QUERY_FETCH_ACTION_NAME constant
* Add more missing AggregationBuilder getters
- getMetadata for all aggs
- various getters on TermsAggBuilder (without "get" prefix to maintain convention)
- Also makes InternalSum's ctor public, to follow suit of other metrics (min/max/avg/etc)
We introduced a new API for ranges in order to be able to decide whether points
or doc values would be more appropriate to execute a query, but since
`ProfileWeight` does not implement this API, the optimization is disabled when
profiling is enabled.
In order to add scroll support for cross cluster search we need
to resolve the nodes encoded in the scroll ID to send requests to the
corresponding nodes. This change adds the low level connection infrastructure
that also ensures that connections are re-established if the cluster is
disconnected due to a network failure or restarts.
Relates to #25094
Today if a channel gets closed due to a disconnect we notify the response
handler that the connection is closed and the node is disconnected. Unfortunately
this is not a complete solution since it only works for published connections.
Connections that are unpublished ie. for discovery can indefinitely hang since we
never invoke their handers when we get a failure while a user is waiting for
the response. This change adds connection tracking to TcpTransport that ensures
we are notifying the corresponding connection if there is a failure on a channel.
This modifies a method Mark added to the AggregatorBase that allows aggregations
to add additional memory tracking for datastructures used during execution. If
an aggregation would like to reclaim circuit breaker reserved bytes by adding a
negative number, `addWithoutBreaking` should be used instead of
`addEstimateBytesAndMaybeBreak`.
Resolves#24511
Duplicate data paths already fail to work because we would attempt to
take out a node lock on the directory a second time which will fail
after the first lock attempt succeeds. However, how this failure
manifests is not apparent at all and is quite difficult to
debug. Instead, we should explicitly reject duplicate data paths to make
the failure cause more obvious.
Relates #25178
When attempting to obtain the node lock, if an exception is thrown it is
not logged. This makes debugging difficult. This commit causes such an
exception to be logged.
Relates #25176
* Aggregations bug: Significant_text fails on arrays of text.
The set of previously-seen tokens in a doc was allocated per-JSON-field string value rather than once per JSON document meaning the number of docs containing a term could be over-counted leading to exceptions from the checks in significance heuristics. Added unit test for this scenario
Closes#25029
Sorted scroll search can use early termination when the index sort matches the scroll search sort.
The optimization can be done after the first query (which still needs to collect all documents)
by applying a query that only matches documents that are greater than the last doc retrieved in the previous request.
Since the index is sorted, retrieving the list of documents that are greater than the last doc
only requires a binary search on each segment.
This change introduces this new query called `SortedSearchAfterDocQuery` and apply it when possible.
Scrolls with this optimization will search all documents on the first request and then will early terminate each segment
after $size doc for any subsequent requests.
Relates #6720
#25005 changed the translog dynamic to fsync the checkpoint before trimming a file. This changed the dynamics of potential failure modes which requires a change to testWithRandomException - it's now possible that we had an exception but the translog was trimmed.
Closes#25133
Get mappings HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for get
mappings HEAD requests, and just relying on the general mechanism that
exists for handling HEAD requests in the REST layer.
Relates #23192
Today when an exception is thrown handling a HEAD request, the body is
swallowed before the channel has a chance to see it. Yet, the channel is
where we compute the content length that would be returned as a header
in the response. This is a violation of the HTTP specification. This
commit addresses the issue. To address this issue, we remove the special
handling in bytes rest response for HEAD requests when an exception is
thrown. Instead, we let the upstream channel handle the special case, as
we already do today for the non-exceptional case.
Relates #25172
We have a custom logger implementation known as a prefix logger that is
used to write every message by the logger with a given prefix. This is
useful for node-level, index-level, and shard-level messages where we
want to log the node name, index name, and shard ID, respectively, if
possible. The mechanism that we employ is that of a marker. Log4j has a
built-in facility for managing these markers, but its effectively a
memory leak because these markers are held in a map and can never be
released. This is problematic for us since indices and shards do not
necessarily have infinite life spans and so on a node where there are
many indices being creted and destroyed, this infinite lifespan can be a
problem indeed. To solve this, we use our own cache of markers. This is
necessary to prevent too many instances of the marker for the same
prefix from being created (just think of all the shard-level components
that exist in the system), and to workaround the effective leak in
Log4j. These markers are stored as weak references in a weak hash
map. It is these weak references that are unneeded. When a key is
removed from a weak hash map, the corresponding entry is placed on a
reference queue that is eventually cleared. This commit simplifies
prefix logger by removing this unnecessary weak reference wrapper.
Relates #22460
When the cluster state is updated with Shard Started entries, it simply adds "shard-started" as the source of the change.
This adds the index name and shard ID so that we can see who/what is spamming the changes when the index creation step has already left the cluster state.
There are a few places where arrays are output in messages yet the
output would merely use the default toString implementation rather than
actually putting the content of the array in the message. This commit
fixes the issue.
Relates #24340
This change extends the tests and parsing of SearchResponse to make sure we can
skip additional fields the parser doesn't know for forward compatibility
reasons.
This commit adds back "id" as the key within a script to specify a
stored script (which with file scripts now gone is no longer ambiguous).
It also adds "source" as a replacement for "code". This is in an attempt
to normalize how scripts are specified across both put stored scripts and script usages, including search template requests. This also deprecates the old inline/stored keys.
When `index.mapping.single_type` is `true` the `_uid` field is not used and instead `_id` field is used.
Prior to this change nested documents would in this case still use the `_uid` field to mark to what root
document they belong to. In case of deleting documents this could lead to only the root Lucene document
to be deleted and not the nested Lucene documents. This broke the docid block ordering the block join
relies on in order to work correctly and thus causing the `nested` query, `nested` aggregation, nested sorting
and nested inner hits to either fail or yield incorrect results.
This bug only manifests in 6.0.0-ALPHA2 release and snaphots (5.5.0-SNAPSHOT, 5.6.0-SNAPSHOT, 6.0.0-SNAPSHOT).
This was introduced in #24460: the constructor of `Translog.Delete` that takes
a `StreamInput` does not set the type and id. To make it a bit more robust, I
made fields final so that forgetting to set them would make the compiler
complain.
This change removes the `postings` highlighter. This highlighter has been removed from Lucene master (7.x) because it behaves
exactly like the `unified` highlighter when index_options is set to `offsets`:
https://issues.apache.org/jira/browse/LUCENE-7815
It also makes the `unified` highlighter the default choice for highlighting a field (if `type` is not provided).
The strategy used internally by this highlighter remain the same as before, it checks `term_vectors` first, then `postings` and ultimately it re-analyzes the text.
Ultimately it rewrites the docs so that the options that the `unified` highlighter cannot handle are clearly marked as such.
There are few features that the `unified` highlighter is not able to handle which is why the other highlighters (`plain` and `fvh`) are still available.
I'll open separate issues for these features and we'll deprecate the `fvh` and `plain` highlighters when full support for these features have been added to the `unified`.
This change extends the tests and parsing of SearchShardFailure to make sure we
can skip fields the parser doesn't know for forward compatibility reasons.
When parsing responses we should be ignoring any new unknown fields or inner
objects in most cases to be forward compatible with changes in core on the
client side. This change adds test for this for Suggestions and its various
subclasses to check if we are able to ignore new fields and objects in the
xContent.
When we disabled `_all` by default for indices created in 6.0, we missed adding
a layer that would handle the situation where `_all` was not enabled in 5.x and
then the cluster was updated to 6.0, this means that when the cluster was
updated the `_all` field would be disabled for 5.x indices and field values
would not be added to the `_all` field.
This adds a compatibility layer for 5.x indices where we treat the default
enabled value for the `_all` field to be `true` if unset on 5.x indices.
Resolves#25068
The Log4j dependency is separated into two artifacts, the API and the
core implementation. This is to enable replacing Log4j on the backend
through the SLF4J bridge with another logging implementation. For this
reason, the dependencies are marked as optional. This causes confusion
amongst users as to use the bridge, the API should be non-optional since
it is needed for the bridge to function correctly. While they could pull
it into their application directly, it would be clearer if we simply
marked this depdendency as non-optional. Note that this does not mean
that users have to use Log4j for logging in their application, so we are
not marking core as required, it only clarifies what they need to be
able to plug in a different logging implementation.
Relates #25136
Previously this would output:
```
GET /test-1/_mappings
{ }
```
And after this change:
```
GET /test-1/_mappings
{
"test-1": {
"mappings": {}
}
}
```
To bring parity back to the REST output after #24723.
Relates to #25090
Previously in #24723 we changed the `_alias` API to not go through the
`RestGetIndicesAction` endpoint, instead creating a `RestGetAliasesAction` that
did the same thing.
This changes the formatting so that it matches the old formatting of the
endpoint, before:
```
GET /test-1/_alias
{ }
```
And after this change:
```
GET /test-1/_alias
{
"test-1": {
"aliases": {}
}
}
```
This is related to #25090
GeoUtils#isValidLongitude is inconsistent with GeoUtils#isValidLatitude.
Neither technically need the isInfinite() check because they then compare
against min and max values.
When parsing resonses we should be ignoring any new unknown fields or inner
objects in most cases to be forward compatible with changes in core on the
client side. This change adds test for this for QueryProfileShardResult and
nested substructures and changes the parsing code where necessary to be able to
ignore new fields and objects in the xContent.
Test: randomVersionBetween works with unreleased
Modifies randomVersionBetween so that it works with unreleased
versions. This should make switching a version from unreleased
to released much simpler.
Added common base class for ScriptDocValues.Strings and ScriptDocValues.BytesRefs now that these classes are very similar.
Also cleaned up the BinaryDVFieldDataTests:
* Use junit assertions instead of hamcrest
* Use BytesRef directly instead of byte[]
Closes#24785
The FVH fails with an NPE when a match phrase prefix is rewritten in an empty phrase query.
This change makes sure that the multi match query rewrites to a MatchNoDocsQuery (instead of an empty phrase query) when there is
a single term and that term does not expand to any term in the index.
Fixes#25088
This commit refactors the query phase in order to be able
to automatically detect queries that can be early terminated.
If the index sort matches the query sort, the top docs collection is early terminated
on each segment and the computing of the total number of hits that match the query is delegated to a simple TotalHitCountCollector.
This change also adds a new parameter to the search request called `track_total_hits`.
It indicates if the total number of hits that match the query should be tracked.
If false, queries sorted by the index sort will not try to compute this information and
and will limit the collection to the first N documents per segment.
Aggregations are not impacted and will continue to see every document
even when the index sort matches the query sort and `track_total_hits` is false.
Relates #6720
This commit modifies query_string, simple_query_string and multi_match queries to always use a DisjunctionMaxQuery when a disjunction over multiple fields is built. The tiebreaker is set to 1 in order to behave like the boolean query in terms of scoring.
The removal of the coord factor in Lucene 7 made this change mandatory to correctly handle minimum_should_match.
Closes#23966
This change extracts the main logic from `TransportClearScrollAction`
into a new class `ClearScrollController` and adds a corresponding unit test.
Relates to #25094
The `scorerSupplier` API allows to give a hint to queries in order to let them
know that they will be consumed in a random-access fashion. We should use this
for aggregations, function_score and matched queries.
When we open a translog, we rely on the `translog.ckp` file to tell us what the maximum generation file should be and on the information stored in the last lucene commit to know the first file we need to recover. This requires coordination and is currently subject to a race condition: if a node dies after a lucene commit is made but before we remove the translog generations that were unneeded by it, the next time we open the translog we will ignore those files and never delete them (I have added tests for this).
This PR changes the approach to have the translog store both of those numbers in the `translog.ckp`. This means it's more self contained and easier to control.
This change also decouples the translog recovery logic from the specific commit we're opening. This prepares the ground to fully utilize the deletion policy introduced in #24950 and store more translog data that's needed for Lucene, keep multiple lucene commits around and be free to recover from any of them.
For the response parsing we want to be lenient when it comes to parsing
new xContent fields. In order to ensure this in our testing, this change
adds a utility method to XContentTestUtils that takes xContent bytes
representation as input and recursively a random field on each object
level.
Sometimes we also want to exclude a whole subtree from this treatment
(e.g. skipping "_source"), other times an element (e.g. "fields", "highlight"
in SearchHit) can have arbitraryly named objects. Those cases can be
specified as exceptions.
This commit removes wrapper methods on QueryShardContext used to compile
scripts. Instead, the script service is made accessible in the context,
and calls to compile can be made directly. This will ease transition to
each of those location becoming their own context, since they would no
longer be able to expect the same script class type.
Splits TranslogRecoveryPerformer into three parts:
- the translog operation to engine operation converter
- the operation perfomer (that indexes the operation into the engine)
- the translog statistics (for which there is already RecoveryState.Translog)
This makes it possible for peer recovery to use the same IndexShard interface as bulk shard requests (i.e. Engine operations instead of Translog operations). It also pushes the "fail on bad mapping" logic outside of IndexShard. Future pull requests could unify the BulkShard and peer recovery path even more.
The unified highlighter rewrites MultiPhrasePrefixQuery to SpanNearQuer even when there is a single term in the phrase.
Though SpanNearQuery throws an exception when the number of clauses is less than 2.
This change returns a simple PrefixQuery when there is a single term and builds the SpanNearQuery otherwise.
Relates #25088
The PR takes a different approach to solve #24806 than currently implemented via #25052. The `refreshMetric` that IndexShard maintains is updated using the refresh listeners infrastructure in lucene. This means that we truly count all refreshes that lucene makes and not have to worry about each individual caller (like `IndexShard@refresh` and `Engine#get()`)
parent/child: Allow updating mapping without specifying `_parent` field on each update.
Prior to this change when a mapping has a `_parent` field then any update (also updates that didn't modify the `_parent` field) to the mapping involved specifying the `_parent` field again. With this change specifying the `_parent` field on each mapping update is no longer required.
Closes#23381
We have a callback interface that is not needed because it is
effectively the same as java.util.function.Consumer. This commit removes
it.
Relates #25089
We use a callback in recovery land during primary relocation to ensure
the relocation target is on at least the same version as the relocation
source. This callback is typed as a Callback<Long> which is an
unnecessary custom type (we can use Consumer<T> or the appropriate
primitive callbacks). Here, we can use LongConsumer.
Relates #25081
Previously the HEAD and GET aliases endpoints were misaigned in
behavior. The HEAD verb would 404 if any aliases are missing while the
GET verb would not if any aliases existed. When HEAD was aligned with
GET, this broke the previous usage of HEAD to serve as an existence
check for aliases. It is the behavior of GET that is problematic here
though, if any alias is missing the request should 404. This commit
addresses this by modifying the behavior of GET to behave in this
way. This fixes the behavior for HEAD to also 404 when aliases are
missing.
Relates #25043
This change moves the parent_id query to the parent-join module and handles the case when only the parent-join field can be declared on an index (index with single type on).
If single type is off it uses the legacy parent join field mapper and switch to the new one otherwise (default in 6).
Relates #20257
This commit fixes the group methdos of Settings to properly include
grouped secure settings. Previously the secure settings were included
but without the group prefix being removed.
closes#25069
The index parameter in the update-aliases, put-alias, and delete-alias APIs no longer accepts alias names. Instead, it accepts only index names (or wildcards which will expand to matching indices).
Closes#23960
This commit fixes a bug in retrieving a sub Settings object for a given
prefix with secure settings. Before this commit the returned Settings
would be filtered by the prefix, but the found setting names would not
have the prefix removed.
This is the first step towards adaptive replica selection (#24915). This PR
tracks the execution time, also known as the "service time" of a task in the
threadpool. The `QueueResizingEsThreadPoolExecutor` then stores a moving average
of these task times which can be retrieved from the executor.
Currently there is no functionality using the EWMA yet (other than tests), this
is only a bite-sized building block so that it's easier to review.
[1]: EWMA = Exponentially Weighted Moving Average
hold (resizing can result in a smaller size than the current size, while
the assert attempted to verify the new size is always greater than the
current).
REST handlers that require a body will throw an an ElasticsearchParseException "request body required".
REST handlers that require a body OR source param will throw an ElasticsearchParseException "request body or source param required".
Replaced asserts in BulkRequest parsing code with a more descriptive IllegalArgumentException if the line contains an empty object.
Updated bulk REST test to verify an empty action line is rejected properly.
Updated BulkRequestTests with randomized testing for an empty action line.
Used try-with-resouces for XContentParser in AbstractBulkByQueryRestHandler.
This commit exposes the secure settings in Settings.Builder, so that
the current secure settings can be retrieved and added to when creating
settings for tests. This is necessary since secure settings can only be
added once to a builder, so chains of methods using settings builders
must reuse the already set mock secure settings.
When the jarhell check fails due to a duplicate jar on the classpath,
the exception message includes the full classpath but not the duplicated
jar. For a long classpath, this can make it difficult to find the jar
that is duplicated. This commit changes the exception message to include
the duplicated jar.
Relates #24953
This removes the parsing of things like `GET /idx/_aliases,_mappings`, instead,
a user must choose between retriving all index metadata with `GET /idx`, or only
a specific form such as `GET /idx/_settings`.
Relates to (and is a prerequisite of) #24437
This commit creates TemplateScript and associated classes so that
templates no longer need a special ScriptService.compileTemplate method.
The execute() method is equivalent to the old run() method.
relates #20426
Previously, when allocating bytes for a BigArray, the array was created
(or attempted to be created) and only then would the array be checked
for the amount of RAM used to see if the circuit breaker should trip.
This is problematic because for very large arrays, if creating or
resizing the array, it is possible to attempt to create/resize and get
an OOM error before the circuit breaker trips, because the allocation
happens before checking with the circuit breaker.
This commit ensures that the circuit breaker is checked before all big
array allocations (note, this does not effect the array allocations that
are less than 16kb which use the [Type]ArrayWrapper classes found in
BigArrays.java). If such an allocation or resizing would cause the
circuit breaker to trip, then the breaker trips before attempting to
allocate and potentially running into an OOM error from the JVM.
Closes#24790
In #24605, logic was implemented to ensure that completed snapshots were
properly removed from the cluster state upon a change in master nodes.
This commit removes redundant logic that also attempted to clean up
completed snapshots from the cluster state on master election, but only
covered a limited case that was remedied in #24605.
This commit also adds a test to ensure cleaning up of completed
snapshots at the right moment in time when a master election happens
before finalizing a snapshot, as well as adds a check to handle the case
where the old master and new master could attempt to finalize the
snapshot and write the same blob to the repository simultaneously.
This removes the `accumulateExceptions()` method (and its usage) from `TransportNodesAction` and `TransportTasksAction`, forcing both transport actions to always accumulate exceptions.
Without this change, some transport actions, like `TransportNodesStatsAction` would respond in very unexpected ways by returning no response due to some failure, but instead of returning an
error the response would simply be empty: no response and no error.
This results in a very trappy response structure where users can check for an error, then attempt to blindly use the response when no error is returned.
This commit reduces the number of buckets that are generated for multi
bucket aggregations in AggregationsTests and SearchResponseTests.
The number of buckets are now limited to a maximum of 3 but before some
aggregations could generate up to 10 buckets.
We can hit an already closed exception when filling the gaps after
blocking operations when updating the primary term on a promoted replica
shard. We should catch this and suppress it as it is an expected outcome
instead of letting it bubble up which leads to trying to fail the shard
which throws yet another already closed exception.
Relates #25021
Some response classes in the java api expose both `getTook()` which returns a `TimeValue` and `getTookInMillis` which returns a `long` value. `getTook()` is enough as one can do `getTook().millis()` to obtain the same result as `getTookInMillis()`, which can be removed.
* Adds nodes usage API to monitor usages of actions
The nodes usage API has 2 main endpoints
/_nodes/usage and /_nodes/{nodeIds}/usage return the usage statistics
for all nodes and the specified node(s) respectively.
At the moment only one type of usage statistics is available, the REST
actions usage. This records the number of times each REST action class is
called and when the nodes usage api is called will return a map of rest
action class name to long representing the number of times each of the action
classes has been called.
Still to do:
* [x] Create usage service to store usage statistics
* [x] Record usage in REST layer
* [x] Add Transport Actions
* [x] Add REST Actions
* [x] Tests
* [x] Documentation
* Rafactors UsageService so counts are done by the handlers
* Fixing up docs tests
* Adds a name to all rest actions
* Addresses review comments
This commit adds a new bg_count field to the REST response of
SignificantTerms aggregations. Similarly to the bg_count that already
exists in significant terms buckets, this new bg_count field is set at
the aggregation level and is populated with the superset size value.
This commit adds an optional `context` url parameter to the put stored
script request. When a context is specified, the script is compiled
against that context before storing, as a validation the script will
work when used in that context.
Today there is a lot of code duplication and different handling of errors
in the two different scroll modes. Yet, it's not clear if we keep both of
them but this simplification will help to further refactor this code to also
add cross cluster search capabilities.
This refactoring also fixes bugs when shards failed due to the node dropped out of the cluster in between scroll requests and failures during the fetch phase of the scroll. Both places where simply ignoring the failure and logging to debug. This can cause issues like #16555
This commit provides the TransportRequest that caused the retrieval of a search context to the
SearchOperationListener#validateSearchContext method so that implementers have access to the
request.
By default, the remove plugin CLI command preserves configuration
files. This is so that if a user is upgrading the plugin (which is done
by first removing the old version and then installing the new version)
they do not lose their configuration file. Yet, there are circumstances
where preserving the configuration file is not desired. This commit adds
a purge option to the remove plugin CLI command.
Relates #24981
Currently, the decisions regarding which translog generation files to delete are hard coded in the interaction between the `InternalEngine` and the `Translog` classes. This PR extracts it to a dedicated class called `TranslogDeletionPolicy`, for two main reasons:
1) Simplicity - the code is easier to read and understand (no more two phase commit on the translog, the Engine can just commit and the translog will respond)
2) Preparing for future plans to extend the logic we need - i.e., retain multiple lucene commit and also introduce a size based retention logic, allowing people to always keep a certain amount of translog files around. The latter is useful to increase the chance of an ops based recovery.
If delimiter or replacement parameter are an empty string, the error is not clear enough to indicate how to fix it.
With this change, the user knows these parameter must be a non empty string.
This is related to #24927. There was a small possibility that a test
was attempting to compress a stream with zero bytes. This was causing
a failure.
This test now requires at least one byte.
This is a follow-up to #23941. Currently there are a number of
complexities related to compression. The raw DeflaterOutputStream must
be closed prior to sending bytes to ensure that EOS bytes are written.
But the underlying ReleasableBytesStreamOutput cannot be closed until
the bytes are sent to ensure that the bytes are not reused.
Right now we have three different stream references hanging around in
TCPTransport to handle this complexity. This commit introduces
CompressibleBytesOutputStream to be one stream implemenation that will
behave properly with or without compression enabled.
This metric is not used in the ES codebase at all. It's also not as likely to be
used since it relies on a periodic "tick", which we don't currently use.
The took time computed for search requests does not take in account the expand search phase.
This change delays the computation to after the expand phase finishes.
Relates #24900
Simon Willnauer
Yannick Welsch
Luca Cavanna
Jim Ferenczi
Igor Motov
Colin Goodheart-Smithe
Christoph Büscher
Sergey Galkin
Jack Conradson
Antonio Matarrese
Martijn van Groningen
Jason Tedor
Adrien Grand
Tim Brooks
Tal Levy
Boaz Leskes
olcbean
Lee Hinman
Yu
Ali Beyad
Jun Ohtani
Tanguy Leroux
markharwood
Drew Raines
Jay Modi
Andreas Gebhardt
Chris Earle
Daniel Mitterdorfer
Ryan Ernst
Nik Everett
Alexander Reelsen
Guillaume Le Floch
David Kyle
Zachary Tong
Lee Hinman
Sergey Novikov
Koen De Groote
Eli Skeggs
Alex Benusovich
Chris Earle
Thomas Decaux
Masaru Hasegawa