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https://issues.apache.org/jira/browse/SPARK-21271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16070961#comment-16070961
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Kazuaki Ishizaki commented on SPARK-21271:
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I see. For var-length part, its regulation (or specification) is a multiple of 
4. Should we use {{hashUnsafeBytes}} instead of 
{{Murmur3_x86_32.hashUnsafeWords}} for {{UnsafeRow.hashCode()}}?


> UnsafeRow.hashCode assertion when sizeInBytes not multiple of 8
> ---------------------------------------------------------------
>
>                 Key: SPARK-21271
>                 URL: https://issues.apache.org/jira/browse/SPARK-21271
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Bogdan Raducanu
>
> The method is:
> {code}
> public int hashCode() {
>     return Murmur3_x86_32.hashUnsafeWords(baseObject, baseOffset, 
> sizeInBytes, 42);
>   }
> {code}
> but sizeInBytes is not always a multiple of 8 (in which case hashUnsafeWords 
> throws assertion) - for example here: 
> {code}FixedLengthRowBasedKeyValueBatch.appendRow{code}
> The fix could be to use hashUnsafeBytes or to use hashUnsafeWords but on a 
> prefix that is multiple of 8.



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