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https://issues.apache.org/jira/browse/HDFS-11156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16413275#comment-16413275
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Weiwei Yang commented on HDFS-11156:
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Hi [~ywskycn]
Correct. [~andrew.wang] did the revert, tracked by HDFS-12457, sees not have
been reverted from branch-2.
I can see 2 options here for a closure
# Reverted this from branch-2, another review on HDFS-12459 and decide if it
can be committed to trunk and branch-3. (A polished patch was posted in
HDFS-12459, [~shahrs87] did the review and gave his +1, but he did not commit
:P. FYI: we have been using the patch in our cluster for over more than 8
months now, it works fine.)
# If no body else wants this, I am OK to do a complete revert in branch-2 and
close HDFS-12459 as not to fix.
I am fine with either way and can help to move forward, but I guess
[~andrew.wang]/[~shahrs87] need to provide their opinion.
Thanks
> Add new op GETFILEBLOCKLOCATIONS to WebHDFS REST API
> ----------------------------------------------------
>
> Key: HDFS-11156
> URL: https://issues.apache.org/jira/browse/HDFS-11156
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: webhdfs
> Affects Versions: 2.7.3
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Priority: Major
> Fix For: 3.0.0-alpha2
>
> Attachments: BlockLocationProperties_JSON_Schema.jpg,
> BlockLocations_JSON_Schema.jpg, FileStatuses_JSON_Schema.jpg,
> HDFS-11156-branch-2.01.patch, HDFS-11156.01.patch, HDFS-11156.02.patch,
> HDFS-11156.03.patch, HDFS-11156.04.patch, HDFS-11156.05.patch,
> HDFS-11156.06.patch, HDFS-11156.07.patch, HDFS-11156.08.patch,
> HDFS-11156.09.patch, HDFS-11156.10.patch, HDFS-11156.11.patch,
> HDFS-11156.12.patch, HDFS-11156.13.patch, HDFS-11156.14.patch,
> HDFS-11156.15.patch, HDFS-11156.16.patch, Output_JSON_format_v10.jpg,
> SampleResponse_JSON.jpg
>
>
> Following webhdfs REST API
> {code}
> http://<HOST>:<PORT>/webhdfs/v1/<PATH>?op=GET_BLOCK_LOCATIONS&offset=0&length=1
> {code}
> will get a response like
> {code}
> {
> "LocatedBlocks" : {
> "fileLength" : 1073741824,
> "isLastBlockComplete" : true,
> "isUnderConstruction" : false,
> "lastLocatedBlock" : { ... },
> "locatedBlocks" : [ {...} ]
> }
> }
> {code}
> This represents for *o.a.h.h.p.LocatedBlocks*. However according to
> *FileSystem* API,
> {code}
> public BlockLocation[] getFileBlockLocations(Path p, long start, long len)
> {code}
> clients would expect an array of BlockLocation. This mismatch should be
> fixed. Marked as Incompatible change as this will change the output of the
> GET_BLOCK_LOCATIONS API.
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