Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11250#discussion_r53547645
--- Diff:
extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
---
@@ -268,9 +270,9 @@ abstract class KinesisStreamTests(aggregateTestData:
Boolean) extends KinesisFun
// Verify that the recomputed RDDs are KinesisBackedBlockRDDs with the
same sequence ranges
// and return the same data
- val times = collectedData.keySet
+ val times = collectedData.synchronized { collectedData.keySet }
--- End diff --
I think you'd either have to make a copy of the key set being returned, or
synchronize the entire `foreach` block below. The set is (I believe) backed by
the collection and can be modified during iteratio.
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