* master: (911 commits)
[TEST] wait for yellow after setup doc tests (#18726)
Fix recovery throttling to properly handle relocating non-primary shards (#18701)
Fix merge stats rendering in RestIndicesAction (#18720)
[TEST] mute RandomAllocationDeciderTests.testRandomDecisions
Reworked docs for index-shrink API (#18705)
Improve painless compile-time exceptions
Adds UUIDs to snapshots
Add test rethrottle test case for delete-by-query
Do not start scheduled pings until transport start
Adressing review comments
Only filter intial recovery (post API) when shrinking an index (#18661)
Add tests to check that toQuery() doesn't return null
Removing handling of null lucene query where we catch this at parse time
Handle empty query bodies at parse time and remove EmptyQueryBuilder
Mute failing assertions in IndexWithShadowReplicasIT until fix
Remove allow running as root
Add upgrade-not-supported warning to alpha release notes
remove unrecognized javadoc tag from matrix aggregation module
set ValuesSourceConfig fields as private
Adding MultiValuesSource support classes and documentation to matrix stats agg module
...
A RestClient instance is now created whenever EsIntegTestCase#getRestClient is invoked for the first time. It is then kept until the cluster is cleared (depending on the cluster scope of the test).
Renamed other two restClient methods to createRestClient, as that instance needs to be closed and managed in the tests.
A RestClient instance is now created whenever EsIntegTestCase#getRestClient is invoked for the first time. It is then kept until the cluster is cleared (depending on the cluster scope of the test).
Renamed other two restClient methods to createRestClient, as that instance needs to be closed and managed in the tests.
* [TEST] wait for yellow after setup doc tests
We have many places in the doc where we expect and index to be
yellow before we execute a query. Therefore we have to
always wait for yellow after setup.
Unit tests rely on mockito to mock the internal HttpClient instance. No http request is performed, we only simulate interaction between RestClient and its internal HttpClient.
Store default headers ourselves instead, otherwise default ones cannot be replaced. Don't allow for multiple headers with same key, last one wins and replaces previous ones with same key.
Also fail with null params or headers.
Although elasticsearch doesn't support these methods (RestController doesn't even allow to register handler for them), the RestClient should allow to send requests using them.
Use sun HttpServer instead and disable forbidden-apis for test classes. It turns out to be more flexible than okhttp as it allows get & delete with body.
Create a new subproject called client-sniffer that contains the o.e.client.sniff package. Since it is going to go to a separate jar, due to its additional functionalities and dependency on jackson, it makes sense to have it as a separate project that depends on client. This way we make sure that client doesn't depend on it etc.
ElasticsearchResponseException, as well as ElasticsearchResponse, should only be created from o.e.client package.
RequestLogger should only be used from this package too.
Instead of having a Connection mutable object that holds the state of the connection to each host, we now have immutable objects only. We keep two sets, one with all the hosts, one with the blacklisted ones. Once we blacklist a host we associate it with a DeadHostState which keeps track of the number of failed attempts and when the host should be retried. A new state object is created each and every time the state of the host needs to be updated.
We still have a wrapper called RestTestClient that is very specific to Rest tests, as well as RestTestResponse etc. but all the low level bits around http connections etc. are now handled by RestClient.
The only small problem is that the response gets closed straightaway and its body read immediately into a string. Should be ok to load it all into memory eagerly though in case of errors. Otherwise it becomes cumbersome to have an exception implement Closeable...
