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https://issues.apache.org/jira/browse/SPARK-31592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17096743#comment-17096743
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Apache Spark commented on SPARK-31592:
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User 'fanyunbojerry' has created a pull request for this issue:
https://github.com/apache/spark/pull/28389
> bufferPoolsBySize in HeapMemoryAllocator should be thread safe
> --------------------------------------------------------------
>
> Key: SPARK-31592
> URL: https://issues.apache.org/jira/browse/SPARK-31592
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.3
> Reporter: Yunbo Fan
> Priority: Major
>
> Currently, bufferPoolsBySize in HeapMemoryAllocator uses a Map type whose
> value type is LinkedList.
> LinkedList is not thread safe and may hit the error below
> {code:java}
> java.util.NoSuchElementExceptionException
> at java.util.LinkedList.removeFirst(LinkedList.java:270)
> at java.util.LinkedList.remove(LinkedList.java:685)
> at
> org.apache.spark.unsafe.memory.HeapMemoryAllocator.allocate(HeapMemoryAllocator.java:57){code}
>
>
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