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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1820) Bug in DoubleParser and FloatParser - empty String is not casted to 0
Date Tue, 07 Apr 2015 14:11:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483215#comment-14483215
] 

Stephan Ewen commented on FLINK-1820:
-------------------------------------

Given the discussion here, I agree with Fabian. An exception is easier to understand than
strange results because of a sneaky zero inserted for empty fields...

> Bug in DoubleParser and FloatParser - empty String is not casted to 0
> ---------------------------------------------------------------------
>
>                 Key: FLINK-1820
>                 URL: https://issues.apache.org/jira/browse/FLINK-1820
>             Project: Flink
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.8.0, 0.9, 0.8.1
>            Reporter: Felix Neutatz
>            Assignee: Felix Neutatz
>            Priority: Critical
>             Fix For: 0.9
>
>
> Hi,
> I found the bug, when I wanted to read a csv file, which had a line like:
> "||\n"
> If I treat it as a Tuple2<Long,Long>, I get as expected a tuple (0L,0L).
> But if I want to read it into a Double-Tuple or a Float-Tuple, I get the following error:
> java.lang.AssertionError: Test failed due to a org.apache.flink.api.common.io.ParseException:
Line could not be parsed: '||'
> ParserError NUMERIC_VALUE_FORMAT_ERROR 
> This error can be solved by adding an additional condition for empty strings in the FloatParser
/ DoubleParser.
> We definitely need the CSVReader to be able to read "empty values".
> I can fix it like described if there are no better ideas :)



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