weixiuli 8b0aa59218 [SPARK-26288][CORE] add initRegisteredExecutorsDB ... ## What changes were proposed in this pull request? As we all know that spark on Yarn uses DB https://github.com/apache/spark/pull/7943 to record RegisteredExecutors information which can be reloaded and used again when the ExternalShuffleService is restarted . The RegisteredExecutors information can't be recorded both in the mode of spark's standalone and spark on k8s , which will cause the RegisteredExecutors information to be lost ,when the ExternalShuffleService is restarted. To solve the problem above, a method is proposed and is committed . ## How was this patch tested? new unit tests Closes #23393 from weixiuli/SPARK-26288. Authored-by: weixiuli <weixiuli@jd.com> Signed-off-by: Imran Rashid <irashid@cloudera.com>		2019-03-19 16:16:43 -05:00
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src	[SPARK-26288][CORE] add initRegisteredExecutorsDB	2019-03-19 16:16:43 -05:00
pom.xml	[SPARK-25956] Make Scala 2.12 as default Scala version in Spark 3.0	2018-11-14 16:22:23 -08:00