Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11250#discussion_r53547651
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/dstream/FileInputDStream.scala
---
@@ -148,7 +148,10 @@ class FileInputDStream[K, V, F <: NewInputFormat[K,
V]](
// Find new files
val newFiles = findNewFiles(validTime.milliseconds)
logInfo("New files at time " + validTime + ":\n" +
newFiles.mkString("\n"))
- batchTimeToSelectedFiles += ((validTime, newFiles))
+ batchTimeToSelectedFiles.synchronized
+ {
--- End diff --
Nit: put this brace on the previous line
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