[jira] [Commented] (HIVE-3168) LazyBinaryObjectInspector.getPrimitiveJavaObject copies beyond length of underlying BytesWritable

["Thejas M Nair (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-3168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13399000#comment-13399000 ] 

Thejas M Nair commented on HIVE-3168:
-------------------------------------

review board link - https://reviews.facebook.net/D3777
                
> LazyBinaryObjectInspector.getPrimitiveJavaObject copies beyond length of underlying BytesWritable
> -------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-3168
>                 URL: https://issues.apache.org/jira/browse/HIVE-3168
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.9.0
>            Reporter: Thejas M Nair
>            Assignee: Thejas M Nair
>             Fix For: 0.10.0, 0.9.1
>
>         Attachments: HIVE-3168.1.patch
>
>
> LazyBinaryObjectInspector.getPrimitiveJavaObject copies the full capacity of the LazyBinary's underlying BytesWritable object, which can be greater than the size of the actual contents. 
> This leads to additional characters at the end of the ByteArrayRef returned. When the LazyBinary object gets re-used, there can be remnants of the later portion of previous entry. 
> This was not seen while reading through hive queries, which I think is because a copy elsewhere seems to create LazyBinary with length == capacity. (probably LazyBinary copy constructor). This was seen when MR or pig used Hcatalog to read the data.

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