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Apache Spark commented on SPARK-15045:
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User 'abhi951990' has created a pull request for this issue:
https://github.com/apache/spark/pull/12829
> Remove dead code in TaskMemoryManager.cleanUpAllAllocatedMemory for pageTable
> -----------------------------------------------------------------------------
>
> Key: SPARK-15045
> URL: https://issues.apache.org/jira/browse/SPARK-15045
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.0
> Reporter: Jacek Laskowski
> Priority: Trivial
>
> Unless my eyes trick me, {{TaskMemoryManager}} first clears up {{pageTable}} in a synchronized
block and right after the block it does it again. I think the outside cleaning is a dead code.
> See https://github.com/apache/spark/blob/master/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java#L382-L397
with the relevant snippet pasted below:
> {code}
> public long cleanUpAllAllocatedMemory() {
> synchronized (this) {
> Arrays.fill(pageTable, null);
> ...
> }
> for (MemoryBlock page : pageTable) {
> if (page != null) {
> memoryManager.tungstenMemoryAllocator().free(page);
> }
> }
> Arrays.fill(pageTable, null);
> ...
> {code}
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