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https://issues.apache.org/jira/browse/FLINK-1820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483973#comment-14483973
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Felix Neutatz commented on FLINK-1820:
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ok, I agree with you. I will add the exceptions instead
> 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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