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https://issues.apache.org/jira/browse/SPARK-6157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14346800#comment-14346800
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Apache Spark commented on SPARK-6157:
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User 'suyanNone' has created a pull request for this issue:
https://github.com/apache/spark/pull/4887
> Unroll unsuccessful memory_and_disk level block should release reserved
> unroll memory after put success in disk
> ---------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-6157
> URL: https://issues.apache.org/jira/browse/SPARK-6157
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.2.1
> Reporter: SuYan
>
> Current code:
> Now we want to cache a Memory_and_disk level block
> 1. Try to put in memory and unroll unsuccessful. then reserved unroll memory
> because we got a iterator from an unroll Array
> 2. Then put into disk.
> 3. Get value from get(blockId), and iterator from that value, and then
> nothing with an unroll Array. So here we should release the reserved unroll
> memory instead will release until the task is end.
> and also, have somebody already pull a request, for get Memory_and_disk level
> block, while cache in memory from disk, we should, use file.length to check
> if we can put in memory store instead just allocate a file.length buffer, may
> lead to OOM.
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