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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11544) LazyInteger should avoid throwing NumberFormatException
Date Thu, 13 Aug 2015 21:56:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696015#comment-14696015
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Gopal V commented on HIVE-11544:
--------------------------------

[~bills]: attached a preliminary patch - can you try this to see whether it covers the cases
that affects your ETL?

> LazyInteger should avoid throwing NumberFormatException
> -------------------------------------------------------
>
>                 Key: HIVE-11544
>                 URL: https://issues.apache.org/jira/browse/HIVE-11544
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>    Affects Versions: 0.14.0, 1.2.0, 1.3.0, 2.0.0
>            Reporter: William Slacum
>            Assignee: Gopal V
>            Priority: Minor
>              Labels: Performance
>         Attachments: HIVE-11544.1.patch
>
>
> {{LazyInteger#parseInt}} will throw a {{NumberFormatException}} under these conditions:
> # bytes are null
> # radix is invalid
> # length is 0
> # the string is '+' or '-'
> # {{LazyInteger#parse}} throws a {{NumberFormatException}}
> Most of the time, such as in {{LazyInteger#init}} and {{LazyByte#init}}, the exception
is caught, swallowed, and {{isNull}} is set to {{true}}.
> This is generally a bad workflow, as exception creation is a performance bottleneck,
and potentially repeating for many rows in a query can have a drastic performance consequence.
> It would be better if this method returned an {{Optional<Integer>}}, which would
provide similar functionality with a higher throughput rate.
> I've tested against 0.14.0, and saw that the logic is unchanged in 1.2.0, so I've marked
those as affected. Any version in between would also suffer from this.



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