This commit changes the compile method of ScriptEngine to be generic in
the same way it is on ScriptService. This moves the shim of handling the
two existing context classes into each script engine, so that each
engine can be worked on independently to convert to real handling of
contexts.
When developing the new ScriptContext, the compiled type was original
generic, so that the instance type was also necessary. However, since
CompiledType is all that is used by the compile method signature, we
actually don't need the instance type to be generic. This commit removes
the InstanceType, and finds the Class for it through reflection on the
CompiledType method.
This commit modifies the compile method of ScriptService to be context
aware. The ScriptContext is now a generic class which contains both the
instance type and compiled type for a script. Instance type may be
stateful (for example, pre loading field information for the index a
script will execute on, like in expressions), while the compiled type is
stateless and used to construct instance type instances. This change is
only a first step to cutover ScriptService to the new paradigm. It only
converts callers to the script service, and has a small shim to wrap
compilation from the script engines to support the current two fixed
instance types, SearchScript and ExecutableScript.
Since groovy was removed, we no longer have any ScriptEngines with
resources to release. We may want to keep the option open for a script
engine to close resources, but this would not be common. This commit
adds a default implementation to ScriptEngine for `close()` to reduce
the boiler plate that must be added for a ScriptEngine implementation.
This commit increases the logging level on the index and relocate
concurrently test to obtain some insight into the global checkpoint
moving backwards.
The current log tries make sure we waited some (but not too long). This is unpredictable and fails all the time. This commit removes all of it and just make sure that we throw the right exceptions after timing out.
Fixes#24369
* SignificantText aggregation - like significant_terms but doesn’t require fielddata=true, recommended used with `sampler` agg to limit expense of tokenizing docs and takes optional `filter_duplicate_text`:true setting to avoid stats skew from repeated sections of text in search results.
Closes#23674
With #24779 in place, we can now guaranteed that a single translog generation file will never have a sequence number conflict that needs to be resolved by looking at primary terms. These conflicts can a occur when a replica contains an operation which isn't part of the history of a newly promoted primary. That primary can then assign a different operation to the same slot and replicate it to the replica.
PS. Knowing that each generation file is conflict free will simplifying repairing these conflicts when we read from the translog.
PPS. This PR also fixes some bugs in the piping of primary terms in the bulk shard action. These bugs are a result of the legacy of IndexRequest/DeleteRequest being a ReplicationRequest. We need to change that as a follow up.
Relates to #10708
This commit cleans up tests which currently use custom script engine
implementations, converting them to use a MockScriptEngine with script
functions provided by the tests. It also creates a common set of metric
scripts which were copied across a couple metric agg tests.
A user reported uneven balancing of load on nodes handling search requests from Kibana which supplies a session ID in a routing preference. Each shardId was selecting the same node for a given session ID because one data node had all primaries and the other data node held all replicas after cluster startup.
This change counteracts the tendency to opt for the same node given the same user-supplied preference by incorporating shard ID in the hash of the preference key. This will help randomise node choices across shards.
Closes#24642
This commit adds comments to org.elasticsearch.Assertions that disables
IntelliJ from complaining about using assert with side-effects, and
using constant conditions there as the side-effect with a constant
condition is intentionally employed.
Today in the code base we have lots of ugly code blocks like:
boolean assertionsEnabled = false;
assert assertionsEnabled = true;
if (assertionsEnabled) {
// something
}
These are a nuisance. Instead, we can do this in exactly one place and
replace these blocks with
if (Assertions.ENABLED) {
// something
}
The cool thing here is that since this is a static final field, the JIT
can optimize away the check at runtime if assertions are disabled.
Relates #24834
This commit moves the handling of nested and parent/child inner hits to specialized classes that can be defined outside of ES core.
InnerHitBuilderContext is now used by the parent query (nested or hasChild, ...) to build the sub context from the InnerHitBuilder definition.
BWC is also ensured so that nodes in previous versions can still send/receive inner hits to/from this version.
Relates #20257
After releasing 5.3.2, the 5.3.3 version constant was created. However,
this causes issues for the rolling upgrade tests, which expect to have
all older versions artifacts published and no point releases created off
of the older versions (older meaning more than one version behind the
current version). This commit removes the 5.3.3 version constant,
assuming we will not need it anywhere.
As we work towards contexts implying the return type of compilation, we
first need ScriptContext to not be an enum. This commit removes the
Standard enum and Plugin subclass of ScriptContext.
This commit fixes the RangeFieldMapper and RangeQueryBuilder to pass the correct relation to the RangeQuery when performing a range query over range fields.
Currently a `delete document` request against a non-existing index actually **creates** this index.
With this change the `delete document` no longer creates the previously non-existing index and throws an `index_not_found` exception instead.
However as discussed in https://github.com/elastic/elasticsearch/pull/15451#issuecomment-165772026, if an external version is explicitly used, the current behavior is preserved and the index is still created and the document is marked for deletion.
Fixes#15425
This commit is a simple cleanup to remove an unnecessary extra method on
ScriptService which was only used in 3 places. There is now only one
search method.
ScriptEngine implementations have an overridable method to indicate they
are safe to use as inline scripts. Since groovy was removed fro 6.0,
there are no longer any implementations which used the default false
value. Furthermore, the value was not actually read anywhere. This
commit removes the method. The ScriptEngineRegistry was also no longer
necessary as it only was used to build a map from language to engine.
This commit removes a convenience method from index shard that is used
at exactly one call site. This method is used to callback a listener
when an operation is on too old of a primary term. Since it is only used
at one call site, we simply inline the method.
Today a replica learns of a new primary term via a cluster state update
and there is not a clean transition between the older primary term and
the newer primary term. This commit modifies this situation so that:
- a replica shard learns of a new primary term via replication
operations executed under the mandate of the new primary
- when a replica shard learns of a new primary term, it blocks
operations on older terms from reaching the engine, with a clear
transition point between the operations on the older term and the
operations on the newer term
This work paves the way for a primary/replica sync on primary
promotion. Future work will also ensure a clean transition point on a
promoted primary, and prepare a replica shard for a sync with the
promoted primary.
Relates #24779
Allows plugins to register pre-configured tokenizers. Much
of the decisions are the same as those in #24223, #24572,
and #24223. This only migrates the lowercase tokenizer but
I figure that is a good start because it proves out the features.
This change removes the field data specialization needed for the parent field and replaces it with
a simple DocValuesIndexFieldData. The underlying global ordinals are retrieved via a new function called
IndexOrdinalsFieldData#getOrdinalMap.
The children aggregation is also modified to use a simple WithOrdinals value source rather than the deleted WithOrdinals.Parent.
Relates #20257
Today when we get a metadata snapshot from the index shard we ensure
that if there is no engine started on the shard that we lock the index
writer before we go and fetch the store metadata. Yet, if we concurrently
recover that shard, recovery finalization might fail since it can't acquire
the IW lock on the directory. This is mainly due to the wrong order of aquiring
the IW lock and the metadata lock. Fetching store metadata without a started engine
should block on the metadata lock in Store.java but since IndexShard locks the writer
first we get into a failed recovery dance especially in test. In production
this is less of an issue since we rarely get into this siutation if at all.
Closes#24481
The method should rather advance one token and only then require a START_OBJECT as the current token. This allows to parse given a parser that's at the beginning of the response, where the initial/current token is null.
Now the Java High Level Rest Client has tests to parse all aggregations,
this test is not needed anymore. We have better tests like
AggregationsTests and sub classes of InternalAggregationTestCase.
Related to #23965
