Gabor Gevay created FLINK-2121:
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Summary: FileInputFormat.addFilesInDir miscalculates total size
Key: FLINK-2121
URL: https://issues.apache.org/jira/browse/FLINK-2121
Project: Flink
Issue Type: Bug
Components: Core
Reporter: Gabor Gevay
Assignee: Gabor Gevay
Priority: Minor
In FileInputFormat.addFilesInDir, the length variable should start from 0,
because the return value is always used by adding it to the length (instead of
just assigning). So with the current version, the length before the call will
be seen twice in the result.
mvn verify caught this for me now. The reason why this hasn't been seen yet, is
because testGetStatisticsMultipleNestedFiles catches this only if it gets the
listings of the outer directory in a certain order. Concretely, if the inner
directory is seen before the other file in the outer directory, then length is
0 at that point, so the bug doesn't show. But if the other file is seen first,
then its size is added twice to the total result.
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