[SPARK-31592] bufferPoolsBySize in HeapMemoryAllocator should be thread safe - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Major
Resolution: Cannot Reproduce
Affects Version/s: 2.4.3
Fix Version/s: None
Component/s: Spark Core
Labels:
None

Description

Currently, bufferPoolsBySize in HeapMemoryAllocator uses a Map type whose value type is LinkedList.

LinkedList is not thread safe and may hit the error below

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)