Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/15675#discussion_r86030559
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingQuerySuite.scala
---
@@ -290,7 +290,10 @@ class StreamingQuerySuite extends StreamTest with
BeforeAndAfter with Logging {
// A StreamingQueryListener that gets the query status after the first
completed trigger
val listener = new StreamingQueryListener {
@volatile var firstStatus: StreamingQueryStatus = null
- override def onQueryStarted(queryStarted: QueryStartedEvent): Unit =
{ }
--- End diff --
nit: please add `@volatile`
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