As the wise man @ywelsch said: currently when we batch cluster state update tasks by the same executor, we the first task un-queued from the pending task queue. That means that other tasks for the same executor are left in the queue. When those are dequeued, they will trigger another run for the same executor. This can give unfair precedence to future tasks of the same executor, even if they weren't batched in the first run. Take this queue for example (all with equal priority)
```
T1 (executor 1)
T2 (executor 1)
T3 (executor 2)
T4 (executor 2)
T5 (executor 1)
T6 (executor 1)
```
If T1 & T2 are picked up first (when T5 & T6 are not yet queued), one would expect T3 & T4 to run second. However, since T2 is still in the queue, it will trigger execution of T5 & T6.
The fix is easy - ignore processed tasks when extracting them from the queue.
Closes#20768
Today it compiles when creating the aggregator, meaning that scripts will be
compiled as many times as there are buckets. Instead it should compile when
creating the factory so that scripts are compiled only once regardless of the
number of buckets.
TRA currently resolves incoming requests to IndexShards in order to acquire operations locks on them. There is no need for all subclasses to have to go through the same IndicesService/IndexService song and dance. Also, doing it once means we don't need to worry about edge cases where the shard is removed while a TRA is in flight.
LongGCDisruption suspends and resumes node threads but respects several
`unsafe` class name patterns where it's unsafe to suspend. For instance
log4j uses a global lock so we can't suspend a thread that is currently
calling into log4j. The same is true for the security manager, it's similar
to log4j a shared resource between the test and the node that is _suspended_.
This change adds `java.lang.SecrityManager` to the unsafe patterns.
This prevents test framework deadlocking if a nodes thread is supended
while it's calling into the security manager that uses synchronized maps etc.
This commit improves the logic flow of BalancedShardsAllocator in
preparation for separating out components of this class to be used
in the cluster allocation explain APIs. In particular, this commit:
1. Adds a minimum value for the index/shard balance factor settings (0.0)
2. Makes the Balancer data structures immutable and pre-calculated at
construction time.
3. Removes difficult to follow labeled blocks / GOTOs
4. Better logic for skipping over the same replica set when one of
the replicas received a NO decision
5. Separates the decision making logic for a single shard from the logic
to iterate over all unassigned shards.
* Add parametrized retries for dnf install
Given that dnf doesn't do retries installation of openjdk can sometimes
be affected by checksum or network issues with mirrors offered by
metalink.
Allow setting number of retries through the parameter
`install_command_retries`
* Insert delay between package install retries
Fedora's metalink occasionally returns broken mirrors. Pausing for a few
seconds between retries increases the chance of receiving a different
list of mirrors from metalink and success with package installation.
This causes the snippets to be tested during the build and gives
helpful links to the reader to open the docs in console or copy them
as curl commands.
Relates to #18160
Before this change the processing of the ranges in the date range (and
other range type) aggregations was done when the Aggregator was created.
This meant that the SearchContext did not know that now had been used in
a range until after the decision to cache was made.
This change moves the processing of the ranges to the aggregation builders
so that the search context is made aware that now has been used before
it decides if the request should be cached
This commit adds a did you mean feature to the strict REST params error
message. This works by comparing any unconsumed parameters to all of the
consumer parameters, comparing the Levenstein distance between those
parameters, and taking any consumed parameters that are close to an
unconsumed parameter as candiates for the did you mean.
* Fix pluralization in strict REST params message
This commit fixes the pluralization in the strict REST parameters error
message so that the word "parameter" is not unconditionally written as
"parameters" even when there is only one unrecognized parameter.
* Strength strict REST params did you mean test
This commit adds an unconsumed parameter that is too far from every
consumed parameter to have any candidate suggestions.
Relates #20747
This commit changes the strict REST parameters message to say that
unconsumed parameters are unrecognized rather than unused. Additionally,
the test is beefed up to include two unused parameters.
Relates #20745
Before this change the processing of the ranges in the date range (and
other range type) aggregations was done when the Aggregator was created.
This meant that the SearchContext did not know that now had been used in
a range until after the decision to cache was made.
This change moves the processing of the ranges to the aggregation builders
so that the search context is made aware that now has been used before
it decides if the request should be cached
This commit adds a did you mean feature to the strict REST params error
message. This works by comparing any unconsumed parameters to all of the
consumer parameters, comparing the Levenstein distance between those
parameters, and taking any consumed parameters that are close to an
unconsumed parameter as candiates for the did you mean.
* Fix pluralization in strict REST params message
This commit fixes the pluralization in the strict REST parameters error
message so that the word "parameter" is not unconditionally written as
"parameters" even when there is only one unrecognized parameter.
* Strength strict REST params did you mean test
This commit adds an unconsumed parameter that is too far from every
consumed parameter to have any candidate suggestions.
Relates #20747
This commit changes the strict REST parameters message to say that
unconsumed parameters are unrecognized rather than unused. Additionally,
the test is beefed up to include two unused parameters.
Relates #20745
Today when parsing a request, Elasticsearch silently ignores incorrect
(including parameters with typos) or unused parameters. This is bad as
it leads to requests having unintended behavior (e.g., if a user hits
the _analyze API and misspell the "tokenizer" then Elasticsearch will
just use the standard analyzer, completely against intentions).
This commit removes lenient URL parameter parsing. The strategy is
simple: when a request is handled and a parameter is touched, we mark it
as such. Before the request is actually executed, we check to ensure
that all parameters have been consumed. If there are remaining
parameters yet to be consumed, we fail the request with a list of the
unconsumed parameters. An exception has to be made for parameters that
format the response (as opposed to controlling the request); for this
case, handlers are able to provide a list of parameters that should be
excluded from tripping the unconsumed parameters check because those
parameters will be used in formatting the response.
Additionally, some inconsistencies between the parameters in the code
and in the docs are corrected.
Relates #20722
On Windows the JDK uses `CreateFileW` which has a stupidly high
limit for the number of `Handle`s it can make - `16 * 1024 * 1024`.
So this isn't really a problem on Windows at all.
Closes#20732
Today, the individual allocation deciders appear in random
order when initialized in AllocationDeciders, which means
potentially more performance intensive allocation deciders
could run before less expensive deciders. This adds to the
execution time when a less expensive decider could terminate
the decision making process early with a NO decision. This
commit orders the initialization of allocation deciders,
based on a general assessment of the big O runtime of each
decider, moving the likely more expensive deciders last.
Closes#12815
IndicesClusterStateService and IndicesStore are responsible for synchronizing local shard state based on incoming cluster state updates. On client/tribe nodes, which don't store any such shard/index data/metadata, all of the logic that computes which data is to be deleted, which shards to be initialized etc. can be completely skipped, saving precious CPU cycles.
