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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/04/30 10:32:04 UTC

[jira] [Commented] (SPARK-20537) OffHeapColumnVector reallocation may not copy existing data

    [ https://issues.apache.org/jira/browse/SPARK-20537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990191#comment-15990191 ] 

Apache Spark commented on SPARK-20537:
--------------------------------------

User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/17811

> OffHeapColumnVector reallocation may not copy existing data
> -----------------------------------------------------------
>
>                 Key: SPARK-20537
>                 URL: https://issues.apache.org/jira/browse/SPARK-20537
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.1.0
>            Reporter: Kazuaki Ishizaki
>
> As SPARK-20474 revealed, reallocation in {{OnHeapColumnVector}} may copy a part of the original storage.
> {{OffHeapColumnVector}} reallocation also copies to the new storage data up to {{elementsAppended}}. This variable is only updated when using the ColumnVector.appendX API, while ColumnVector.putX is more commonly used.



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