Steve Loughran updated HADOOP-14943:
    Priority: Minor  (was: Major)

> Add common getFileBlockLocations() emulation for object stores, including S3A
> -----------------------------------------------------------------------------
>                 Key: HADOOP-14943
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14943
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-14943-001.patch, HADOOP-14943-002.patch, 
> HADOOP-14943-002.patch, HADOOP-14943-003.patch, HADOOP-14943-004.patch
> It looks suspiciously like S3A isn't providing the partitioning data needed 
> in {{listLocatedStatus}} and {{getFileBlockLocations()}} needed to break up a 
> file by the blocksize. This will stop tools using the MRv1 APIS doing the 
> partitioning properly if the input format isn't doing it own split logic.
> FileInputFormat in MRv2 is a bit more configurable about input split 
> calculation & will split up large files. but otherwise, the partitioning is 
> being done more by the default values of the executing engine, rather than 
> any config data from the filesystem about what its "block size" is,
> NativeAzureFS does a better job; maybe that could be factored out to 
> hadoop-common and reused?

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