Wei-Chiu Chuang commented on HDFS-10971:

Thanks for the discussion! I filed HADOOP-13715 to work on adding the new API.

> Distcp should not copy replication factor if source file is erasure coded
> -------------------------------------------------------------------------
>                 Key: HDFS-10971
>                 URL: https://issues.apache.org/jira/browse/HDFS-10971
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: distcp
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>              Labels: hdfs-ec-3.0-must-do
>         Attachments: HDFS-10971.testcase.patch
> The current erasure coding implementation uses replication factor field to 
> store erasure coding policy.
> Distcp copies the source file's replication factor to the destination if 
> {{-pr}} is specified. However, if the source file is EC, the replication 
> factor (which is EC policy) should not be replicated to the destination file. 
> When a HdfsFileStatus is converted to FileStatus, the replication factor is 
> set to 0 if it's an EC file.
> In fact, I will attach a test case that shows trying to replicate the 
> replication factor of an EC file results in an IOException: "Requested 
> replication factor of 0 is less than the required minimum of 1 for 
> /tmp/dst/dest2"

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