[jira] [Commented] (ARROW-11872) Array Validation of GPU buffers fails due to incorrect validation check

["Prem Sagar Gali (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-11872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17296069#comment-17296069 ] 

Prem Sagar Gali commented on ARROW-11872:
-----------------------------------------

cc: [~paul.e.taylor]

> Array Validation of GPU buffers fails due to incorrect validation check
> -----------------------------------------------------------------------
>
>                 Key: ARROW-11872
>                 URL: https://issues.apache.org/jira/browse/ARROW-11872
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++, Python
>    Affects Versions: 3.0.0
>            Reporter: Prem Sagar Gali
>            Priority: Major
>
> Whenever we try to create an array or a Table from a GPU buffer we get the following Invalid missing values buffer error.
> pyarrow/table.pxi:485: in pyarrow.lib.chunked_array
>     ???
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ >   ???
> E   pyarrow.lib.ArrowInvalid: In chunk 0: Invalid: Missing values buffer in non-empty arraypyarrow/error.pxi:84: ArrowInvalid
> This is because the GPU buffers aren't passing the following validation check: [https://github.com/apache/arrow/blob/7be266be98d08214ef4b3f067059b6e6a8a6e5c0/cpp/src/arrow/array/validate.cc#L183]
>  
> But this has to be changed to something like: 
> static bool IsBufferValid(const ArrayData& data, int index) {
>     return data.buffers[index] != nullptr && (data.buffers[index]->is_cpu() ? data.buffers[index]->data() != nullptr : true);
>   }



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