[jira] [Created] (SPARK-4667) Spillable can request more than twice its current memory from pool

["Ryan Williams (JIRA)" <ji...@apache.org>]

Ryan Williams created SPARK-4667:
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             Summary: Spillable can request more than twice its current memory from pool
                 Key: SPARK-4667
                 URL: https://issues.apache.org/jira/browse/SPARK-4667
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
            Reporter: Ryan Williams


[Spillable|https://github.com/apache/spark/blob/0eb4a7fb0fa1fa56677488cbd74eb39e65317621/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala#L78] has a comment that says "{{Claim up to double our current memory from the shuffle memory pool}}", but then it proceeds to request {{2 * currentMemory - myMemoryThreshold}}, which can more than double its current memory amount. The requested amount (or the comment) should be changed.



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