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https://issues.apache.org/jira/browse/HADOOP-12657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira AJISAKA moved HDFS-8836 to HADOOP-12657:
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Affects Version/s: (was: 2.7.1)
(was: 2.6.0)
2.6.0
2.7.1
Key: HADOOP-12657 (was: HDFS-8836)
Project: Hadoop Common (was: Hadoop HDFS)
> Skip newline on empty files with getMerge -nl
> ---------------------------------------------
>
> Key: HADOOP-12657
> URL: https://issues.apache.org/jira/browse/HADOOP-12657
> Project: Hadoop Common
> Issue Type: New Feature
> Affects Versions: 2.7.1, 2.6.0
> Reporter: Jan Filipiak
> Assignee: Kanaka Kumar Avvaru
> Priority: Minor
> Attachments: HDFS-8836-01.patch, HDFS-8836-02.patch,
> HDFS-8836-03.patch, HDFS-8836-04.patch, HDFS-8836-05.patch,
> HDFS-8836-06.patch, HDFS-8836-07.patch
>
>
> Hello everyone,
> I recently was in the need of using the new line option -nl with getMerge
> because the files I needed to merge simply didn't had one. I was merging all
> the files from one directory and unfortunately this directory also included
> empty files, which effectively led to multiple newlines append after some
> files. I needed to remove them manually afterwards.
> In this situation it is maybe good to have another argument that allows
> skipping empty files.
> Thing one could try to implement this feature:
> The call for IOUtils.copyBytes(in, out, getConf(), false); doesn't
> return the number of bytes copied which would be convenient as one could
> skip append the new line when 0 bytes where copied or one would check the
> file size before.
> I posted this Idea on the mailing list
> http://mail-archives.apache.org/mod_mbox/hadoop-user/201507.mbox/%3C55B25140.3060005%40trivago.com%3E
> but I didn't really get many responses, so I thought I my try this way.
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