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Posted to hdfs-dev@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2018/09/24 12:36:00 UTC

[jira] [Created] (HDFS-13936) multipart upload to HDFS to support 0 byte upload

Steve Loughran created HDFS-13936:
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             Summary: multipart upload to HDFS to support 0 byte upload
                 Key: HDFS-13936
                 URL: https://issues.apache.org/jira/browse/HDFS-13936
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: fs, hdfs
    Affects Versions: 3.2.0
            Reporter: Steve Loughran
            Assignee: Ewan Higgs


MPUs to HDFS fail as you can't concat an empty block. 

Whatever uploads to HDFS needs to recognise that specific case "0-byte file" and rather than try and concat things, just create a 0-byte file there.

Without this, you can't use MPU as a replacement for distcp or alternative commit protocols.



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