[jira] [Created] (HDFS-11156) WebHDFS GET_BLOCK_LOCATIONS

["Weiwei Yang (JIRA)" <ji...@apache.org>]

Weiwei Yang created HDFS-11156:
----------------------------------

             Summary: WebHDFS GET_BLOCK_LOCATIONS 
                 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


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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