Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/6406#discussion_r31013556
--- Diff:
core/src/main/scala/org/apache/spark/status/api/v1/SimpleDateParam.scala ---
@@ -42,14 +42,16 @@ private[v1] class SimpleDateParam(val originalValue:
String) {
private[v1] object SimpleDateParam {
- val formats: Seq[SimpleDateFormat] = {
+ // `SimpleDateFormat` is not thread-safe
+ val formats = new ThreadLocal[Seq[SimpleDateFormat]]() {
--- End diff --
I just feel using `ThreadLocal` is easy and minimizes the changes.
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