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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java/org/apache/spark/sql	[SPARK-17993][SQL] Fix Parquet log output redirection	2016-11-10 13:41:13 -08:00
resources	[SPARK-16031] Add debug-only socket source in Structured Streaming	2016-06-19 21:27:04 -07:00
scala/org/apache/spark/sql	[SPARK-17822][R] Make JVMObjectTracker a member variable of RBackend	2016-12-09 07:51:46 -08:00