Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/3663#discussion_r21938246
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala ---
@@ -218,34 +219,26 @@ class HiveContext(sc: SparkContext) extends
SQLContext(sc) {
}
}
- /**
- * SQLConf and HiveConf contracts:
- *
- * 1. reuse existing started SessionState if any
- * 2. when the Hive session is first initialized, params in HiveConf
will get picked up by the
- * SQLConf. Additionally, any properties set by set() or a SET
command inside sql() will be
- * set in the SQLConf *as well as* in the HiveConf.
- */
- @transient protected[hive] lazy val (hiveconf, sessionState) =
- Option(SessionState.get())
- .orElse {
- val newState = new SessionState(new
HiveConf(classOf[SessionState]))
- // Only starts newly created `SessionState` instance. Any
existing `SessionState` instance
- // returned by `SessionState.get()` must be the most recently
started one.
- SessionState.start(newState)
- Some(newState)
- }
- .map { state =>
+ @transient lazy val currentSessionState = new
ThreadLocal[SessionState]() {
--- End diff --
I'm not sure we want to expose this as part of the public API, perhaps keep
it as `protected[sql]`.
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