Github user seyfe commented on the issue:
https://github.com/apache/spark/pull/15371
@zsxwing . `JArray(v.asInstanceOf[java.util.List[(BlockId,
BlockStatus)]].asScala.toList.map` this is the line of code which is causing
ConcurrentModificationException. And you can see that from call stack. This is
coming from BlockStatusesAccumulator. Am I missing something here?
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