Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/17933#discussion_r116398915
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
---
@@ -98,6 +101,15 @@ object DateTimeUtils {
sdf
}
+ private val computedTimeZones = new ConcurrentHashMap[String, TimeZone]
+ private val computeTimeZone = new JFunction[String, TimeZone] {
+ override def apply(timeZoneId: String): TimeZone =
TimeZone.getTimeZone(timeZoneId)
+ }
+
+ def getTimeZone(timeZoneId: String): TimeZone = {
+ computedTimeZones.computeIfAbsent(timeZoneId, computeTimeZone)
--- End diff --
I believe Java 7 support was removed as of Spark 2.2.0.
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