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https://issues.apache.org/jira/browse/SPARK-24677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16526051#comment-16526051
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Apache Spark commented on SPARK-24677:
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User 'cxzl25' has created a pull request for this issue:
https://github.com/apache/spark/pull/21656
> MedianHeap is empty when speculation is enabled, causing the SparkContext to
> stop
> ---------------------------------------------------------------------------------
>
> Key: SPARK-24677
> URL: https://issues.apache.org/jira/browse/SPARK-24677
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.1
> Reporter: dzcxzl
> Priority: Critical
>
> When introducing SPARK-23433 , maybe cause stop sparkcontext.
> {code:java}
> ERROR Utils: uncaught error in thread task-scheduler-speculation, stopping
> SparkContext
> java.util.NoSuchElementException: MedianHeap is empty.
> at org.apache.spark.util.collection.MedianHeap.median(MedianHeap.scala:83)
> at
> org.apache.spark.scheduler.TaskSetManager.checkSpeculatableTasks(TaskSetManager.scala:968)
> at
> org.apache.spark.scheduler.Pool$$anonfun$checkSpeculatableTasks$1.apply(Pool.scala:94)
> at
> org.apache.spark.scheduler.Pool$$anonfun$checkSpeculatableTasks$1.apply(Pool.scala:93)
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at org.apache.spark.scheduler.Pool.checkSpeculatableTasks(Pool.scala:93)
> at
> org.apache.spark.scheduler.Pool$$anonfun$checkSpeculatableTasks$1.apply(Pool.scala:94)
> at
> org.apache.spark.scheduler.Pool$$anonfun$checkSpeculatableTasks$1.apply(Pool.scala:93)
> {code}
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