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https://issues.apache.org/jira/browse/HDFS-11156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15704644#comment-15704644
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Weiwei Yang commented on HDFS-11156:
------------------------------------
Hello [~andrew.wang]
Thanks for providing your thought.
>From the [webhdfs
>document|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html]
>
{{The HTTP REST API supports the complete FileSystem/FileContext interface for
HDFS}}
user would expect the BlockLocation[] instead of LocatedBlocks according to
[FileSystem#getFileBlockLocations|https://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileSystem.html#getFileBlockLocations-org.apache.hadoop.fs.Path-long-long-]
interface. I checked rest of APIs, they seemed good like
{{GETFILESTATUS (see FileSystem.getFileStatus)}}
Isn't this a bug worth to fix? I am hoping you can reconsider this.
Thank you
> Webhdfs rest api GET_BLOCK_LOCATIONS output doesn't comply with FileSystem API
> ------------------------------------------------------------------------------
>
> Key: HDFS-11156
> URL: https://issues.apache.org/jira/browse/HDFS-11156
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: webhdfs
> Affects Versions: 2.7.3
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Attachments: HDFS-11156.01.patch, HDFS-11156.02.patch,
> HDFS-11156.03.patch, HDFS-11156.04.patch
>
>
> 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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