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From "Wenchen Fan (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-21271) UnsafeRow.hashCode assertion when sizeInBytes not multiple of 8
Date Thu, 27 Jul 2017 07:28:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-21271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wenchen Fan resolved SPARK-21271.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0

Issue resolved by pull request 18503
[https://github.com/apache/spark/pull/18503]

> 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
>             Fix For: 2.3.0
>
>
> 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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