Xiangrui Meng fd48d80a61 [SPARK-17822][R] Make JVMObjectTracker a member variable of RBackend ... ## What changes were proposed in this pull request? * This PR changes `JVMObjectTracker` from `object` to `class` and let its instance associated with each RBackend. So we can manage the lifecycle of JVM objects when there are multiple `RBackend` sessions. `RBackend.close` will clear the object tracker explicitly. * I assume that `SQLUtils` and `RRunner` do not need to track JVM instances, which could be wrong. * Small refactor of `SerDe.sqlSerDe` to increase readability. ## How was this patch tested? * Added unit tests for `JVMObjectTracker`. * Wait for Jenkins to run full tests. Author: Xiangrui Meng <meng@databricks.com> Closes #16154 from mengxr/SPARK-17822.		2016-12-09 07:51:46 -08:00
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benchmarks	[SPARK-17335][SQL] Fix ArrayType and MapType CatalogString.	2016-09-03 19:02:20 +02:00
src	[SPARK-17822][R] Make JVMObjectTracker a member variable of RBackend	2016-12-09 07:51:46 -08:00
pom.xml	[SPARK-18695] Bump master branch version to 2.2.0-SNAPSHOT	2016-12-02 21:09:37 -08:00