Samarth Jain afbcb9c07f Improve parallelism of zookeeper based segment change processing (#7088) ... * V1 - improve parallelism of zookeeper based segment change processing * Create zk nodes in batches. Address code review comments. Introduce various configs. * Add documentation for the newly added configs * Fix test failures * Fix more test failures * Remove prinstacktrace statements * Address code review comments * Use a single queue * Address code review comments Since we have a separate load peon for every historical, just having a single SegmentChangeProcessor task per historical is enough. This commit also gets rid of the associated config druid.coordinator.loadqueuepeon.curator.numCreateThreads * Resolve merge conflict * Fix compilation failure * Remove batching since we already have a dynamic config maxSegmentsInNodeLoadingQueue that provides that control * Fix NPE in test * Remove documentation for configs that are no longer needed * Address code review comments * Address more code review comments * Fix checkstyle issue * Address code review comments * Code review comments * Add back monitor node remove executor * Cleanup code to isolate null checks and minor refactoring * Change param name since it conflicts with member variable name		2019-05-03 15:58:42 +02:00
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src	Improve parallelism of zookeeper based segment change processing (#7088)	2019-05-03 15:58:42 +02:00
pom.xml	Set version to 0.15.0-incubating-SNAPSHOT (#7014)	2019-02-07 14:02:52 -08:00