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https://issues.apache.org/jira/browse/SPARK-26016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16783513#comment-16783513
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Sean Owen commented on SPARK-26016:
-----------------------------------
[~maxgekk] yeah I'm thinking of parts like
https://github.com/apache/hadoop/blob/f365957c6326f88734bc0a5d01cfb7eac713db20/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java#L172
though, which would skip some input if it happened to match the UTF-8 BOM
bytes. Probably pretty rare in practice, but hey.
At least this needs some docs about the text format only reading/writing UTF-8.
I agree, maybe not worth actually validating the UTF-8 encoding here. But what
about supporting conversion if a non-UTF-8 encoding is specified? I think that
could be a pretty clean change, albeit one with perf implications.
> Encoding not working when using a map / mapPartitions call
> ----------------------------------------------------------
>
> Key: SPARK-26016
> URL: https://issues.apache.org/jira/browse/SPARK-26016
> Project: Spark
> Issue Type: Bug
> Components: Java API
> Affects Versions: 2.4.0
> Reporter: Chris Caspanello
> Priority: Major
> Attachments: spark-sandbox.zip
>
>
> Attached you will find a project with unit tests showing the issue at hand.
> If I read in a ISO-8859-1 encoded file and simply write out what was read;
> the contents in the part file matches what was read. Which is great.
> However, the second I use a map / mapPartitions function it looks like the
> encoding is not correct. In addition a simple collectAsList and writing that
> list of strings to a file does not work either. I don't think I'm doing
> anything wrong. Can someone please investigate? I think this is a bug.
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