Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/11162#discussion_r52565040
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FileStreamSource.scala
---
@@ -35,6 +36,7 @@ import org.apache.spark.util.collection.OpenHashSet
*
* TODO Clean up the metadata files periodically
*/
+@ThreadSafe
--- End diff --
It's just a tag saying the class is thread safe. I just realized we don't
use it in Spark. I will remove it and add document instead.
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