When the `terms` enum operates on non-numeric data it can collect it via
global ordinals. It actually has two separate collection strategies for,
one "dense" and one "remapping". Each of *those* strategies has two
"iteration" strategies that it uses to build buckets, depending on
whether or not we need buckets with `0` docs in them. Previously this
was done with several `null` checks and never really explained. This
change replaces those checks with two `CollectionStrategy` classes which
have good stuff like documentation.
Backporting #56888 to 7.x branch.
Limit the creation of data streams only for namespaces that have a composable template with a data stream definition.
This way we ensure that mappings/settings have been specified and will be used at data stream creation and data stream rollover.
Also remove `timestamp_field` parameter from create data stream request and
let the create data stream api resolve the timestamp field
from the data stream definition snippet inside a composable template.
Relates to #53100
If an upgraded node is restarted multiple times without flushing a new
index commit, then we will wrongly exclude all commits from the starting
commits. This bug is reproducible with these minimal steps: (1) create
an empty index on 6.1.4 with translog retention disabled, (2) upgrade
the cluster to 7.7.0, (3) restart the upgraded the cluster. The problem
is that with the new translog policy can trim translog without having a
new index commit, while the existing commit still refers to the previous
translog generation.
Closes#57091
This saves memory when running numeric significant terms which are not
at the top level by merging its collection into numeric terms and relying
on the optimization that we made in #55873.
Slow loggers should use single shared logger as otherwise when index is
deleted the log4j logger will remain reachable (log4j is caching) and
will create a memory leak.
closes https://github.com/elastic/elasticsearch/issues/56171
When we had multiple mapping types, an update to a field in one type had to be
propagated to the same field in all other types. This was done using the
Mapper.updateFieldType() method, called at the end of a merge. However, now
that we only have a single type per index, this method is unnecessary and can
be removed.
Relates to #41059
Backport of #56986
Closes#57168 by using `AggregatorTestCase#newIndexSearcher` in the
`AggregatorTestCase#testCase`. Without that global ordinals will
*sometimes* fail to work.
Until 7.7 we used to ignore `null` values for `bool`queries `minimum_should_match`,
parameters and also for the `must`, `must_not`, `should` and `filter` clauses.
An internal refactoring has changed this so now we get a parsing error. While `null`
should not a common value here, we should restore the old behaviour for bwc for now.
Closes#56812
If a partial snapshot has some of its shards aborted because an index got deleted, this can lead to confusing `IllegalStateExceptions` when trying to increment the ref count of the already closed `Store`.
Refactored this a little to throw the same exception for aborted shards no matter the timing of the store close and assert that the concurrent store close can in fact only happen when the shard snapshot has already been aborted.
A task might not be canceled on disconnection if it is completed before the cancellation
is started. We need to relax the assertion in this test.
Closes#56746
When slicing a releasable bytes reference we would create a new counter
every time and pass the original reference chain to the new slice on every
slice invocation. This would lead to extremely deep reference chains and
needlessly uses a dedicated counter for every slice when all the slices
eventually just refer to the same underlying bytes and `Releasable`.
This commit tracks the ref count wrapper with its releasable in a separate
object that can be passed around on every slicing, making the slices' tree
as flat as the original releasable bytes reference.
Also, we were needlessly creating a redundant releasable bytes reference from
a releasable bytes-stream-output that we never actually used for releasing (all code
that uses it just releases the stream itself instead).
We don't need to hold on to the request body past the beginning of sending
the response. There is no need to keep a reference to it until after the response
has been sent fully and we can eagerly release it here.
Note, this can be optimized further to release the contents even earlier but for now
this is an easy increment to saving some memory on the IO pool.
* Update DeprecationMap to DynamicMap (#56149)
This renames DeprecationMap to DynamicMap, and changes the deprecation
messages Map to accept a Map of String (keys) to Functions (updated values)
instead. This creates more flexibility in either logging or updating values from
params within a script. This change is required to fix (#52103) in a future PR.
* Fix Source Return Bug in Scripting (#56831)
This change ensures that when a user returns _source directly no matter where
accessed within scripting, the value is a Map of the converted source as
opposed to a SourceLookup.
These log statements are also logged by every "simulate adding this index"
functionality. One of them is the rollover action in ILM which executes
rollover dry-runs until the conditions are met, when the actual rollover
is executed.
This changes the statements log level to DEBUG and changes the phrasing
from V1/V2 to legacy/composable templates.
(cherry picked from commit 7cc8e1fe7f9731213ac4869fe99853564fbaaba9)
Signed-off-by: Andrei Dan <andrei.dan@elastic.co>
Today a transport response uses the same wire format version as the
corresponding request. This mostly works since we mostly know we are
communicating with a node with a compatible version. TCP handshakes don't have
this guarantee since they use `Version.CURRENT.minimumCompatibilityVersion()`
to let us handshake with older nodes. This results in the strange situation of
a node of major version `N` responding to a node of major version `N-1` using a
wire format of version `N-2`.
We put extra effort into the longer BWC requirements for successful responses,
but we do not offer the same guarantees for error responses since they may be
rather complicated to serialize. This can result in the request sender
misinterpreting the response which may have unpredictable consequences.
Rather than strengthening the guarantees in this area, this commit simply logs
the exception and closes the connection on a handshake error with a node that
uses an incompatible wire format.
Closes#54337
Today a transport response uses the same wire format version as the
corresponding request. This mostly works since we mostly know we are
communicating with a node with a compatible version. TCP handshakes don't have
this guarantee since they use `Version.CURRENT.minimumCompatibilityVersion()`
to let us handshake with older nodes. This results in the strange situation of
a node of major version `N` responding to a node of major version `N-1` using a
wire format of version `N-2`.
We put extra effort into the longer BWC requirements for successful responses,
but we do not offer the same guarantees for error responses since they may be
rather complicated to serialize. This can result in the request sender
misinterpreting the response which may have unpredictable consequences.
Rather than strengthening the guarantees in this area, this commit simply logs
the exception and closes the connection on a handshake error with a node that
uses an incompatible wire format.
Closes#54337
All of these files were written by us, and not sourced from
anywhere. Therefore, the license head should be granting licenses to
Elasticsearch, rathern than to the ASF. This commit address them by
changing the license to our standard Apache 2.0 license header.
Merging logic is currently split between FieldMapper, with its merge() method, and
MappedFieldType, which checks for merging compatibility. The compatibility checks
are called from a third class, MappingMergeValidator. This makes it difficult to reason
about what is or is not compatible in updates, and even what is in fact updateable - we
have a number of tests that check compatibility on changes in mapping configuration
that are not in fact possible.
This commit refactors the compatibility logic so that it all sits on FieldMapper, and
makes it called at merge time. It adds a new FieldMapperTestCase base class that
FieldMapper tests can extend, and moves the compatibility testing machinery from
FieldTypeTestCase to here.
Relates to #56814
When `date_histogram` is a sub-aggregator it used to allocate a bunch of
objects for every one of it's parent's buckets. This uses the data
structures that we built in #55873 rework the `date_histogram`
aggregator instead of all of the allocation.
Part of #56487
Elasticsearch requires that a HttpRequest abstraction be implemented
by http modules before server processing. This abstraction controls when
underlying resources are released. This commit moves this abstraction to
be created immediately after content aggregation. This change will
enable follow-up work including moving Cors logic into the server
package and tracking bytes as they are aggregated from the network
level.
PR #56893 was supposed to randomise the iteration count in
`testDataOnlyNodePersistence` but this change was mistakenly omitted. This
commit addresses this.
This test failed if all 1000 top-level `rarely()` calls in the loop returned
`false`, because then we would never set the term of the persisted state. This
commit fixes this by adding an earlier call to `persistedState#setCurrentTerm`.
It also changes the test to clean up the threadpools it starts whether it
passes or fails.
When reading/writing the individual doc responses in the context
of a bulk shard response there is no need to serialize the `ShardId`
over and over. This can waste a lot of memory when handling large bulk
requests.
This assertion is too strict. A snapshot will be removed from the cluster state
on the CS thread before it is removed from the listeners map on the snapshot thread pool.
Throughout the removal from the cluster state and listener map, the snapshot is tracked
in `endingSnapshots` though, so we can relax the assertion accordingly and are still able
to catch leaked listeners.
Closes#56607
In the unlikely event that the data nodes started snapshotting the
shards already (and hence got blocked on the data blobs) before the
master has applied the cluster state to its own `SnapshotsService` on
the CS applier thread, we can get a `SnapshotMissingException` here which
breaks the busy assert loop so we have to deal with it explicitly.
Closes#56858
Currently it is possible that a sniff connection round is occurring as
we enter another test loop in testEnsureWeReconnect. The problem is that
once we enter another loop, closing the connection manually can cause
this pre-existing connection round to fail. This round failing can fail
the test. This commit fixes the issue by ensuring that there are no
in-progress connections before entering another loop.
It was relying on the compensated sum working but the test framework was
dodging it. This forces the accuracy tests to come from a single shard
where we get the proper compensated sum.
Closes#56757
We get the number of shards and replicas with our bare hands in index
metadata, rather than letting the settings infrastructure do the work
for us. This commit switches to using the settings infrastructure.
Today a 7.x node logs `cluster UUID set to [...]` on every cluster state update
received from a 6.8 master, because 6.8 nodes are not able to commit the
cluster UUID properly. We could try and deduplicate these logs somehow, but
that would introduce a good deal of complexity. Instead, this commit suppresses
these logs entirely when receiving cluster state updates from a 6.8 master.
Mapper.Builder currently has some complex generics on it to allow fluent builder
construction. However, the second parameter, a return type from the build() method,
is unnecessary, as we can use covariant return types. This commit removes this second
generic parameter.
This is another part of the breakup of the massive BuildPlugin. This PR
moves the code for configuring publications to a separate plugin. Most
of the time these publications are jar files, but this also supports the
zip publication we have for integ tests.
This aggregation will perform normalizations of metrics
for a given series of data in the form of bucket values.
The aggregations supports the following normalizations
- rescale 0-1
- rescale 0-100
- percentage of sum
- mean normalization
- z-score normalization
- softmax normalization
To specify which normalization is to be used, it can be specified
in the normalize agg's `normalizer` field.
For example:
```
{
"normalize": {
"buckets_path": <>,
"normalizer": "percent"
}
}
```
