610ba7e427
* Register data node stats from info carried back in search responses This is part of #24915, where we now calculate the EWMA of service time for tasks in the search threadpool, and send that as well as the current queue size back to the coordinating node. The coordinating node now tracks this information for each node in the cluster. This information will be used in the future the determining the best replica a search request should be routed to. This change has no user-visible difference. * Move response time timing into ResponseListenerWrapper * Move ResponseListenerWrapper to ActionListener instead of SearchActionListener Also removes the logger * Move `requestIndex` back to private * De-guice-ify ResponseCollectorService \o/ * Undo all changes to SearchQueryThenFetchAsyncAction * Remove unneeded response collector from TransportSearchAction * Undo all changes to SearchDfsQueryThenFetchAsyncAction * Completely rewrite the inside of ResponseCollectorService's record keeping * Documentation and cleanups for ResponseCollectorService * Add unit test for collection of queue size and service time * Fix Guice construction error * Add basic unit tests for ResponseCollectorService * Fix version constant for the master merge * Fix test compilation after master merge * Add a test for node removal on cluster changed event * Remove integration test as there are now unit tests * Rename ResponseListenerWrapper -> SearchExecutionStatsCollector * Fix line-length * Make classes private and final where appropriate * Pass nodeId into SearchExecutionStatsCollector and use only ActionListener * Get nodeId from connection so searchShardTarget can be private * Remove threadpool from SearchContext, get it from IndexShard instead * Add missing import * Use BiFunction for responseWrapper rather than passing in collector service |
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