CR Hota created HDFS-14369:
------------------------------

             Summary: RBF: Fix trailing "/" for webhdfs
                 Key: HDFS-14369
                 URL: https://issues.apache.org/jira/browse/HDFS-14369
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: CR Hota
            Assignee: CR Hota


WebHDFS doesn't trim trailing slash causing discrepancy in operations.

Example below
--------------------------
Using HDFS API, two directory are listed.

$ hdfs dfs -ls hdfs://<router>:8888/tmp/
Found 2 items
drwxrwxrwx   - hdfs supergroup          0 2018-11-09 17:50 
hdfs://<router>:8888/tmp/tmp1
drwxrwxrwx   - hdfs supergroup          0 2018-11-09 17:50 
hdfs://<router>:8888/tmp/tmp2

Using WebHDFS API, only one directory is listed.
$ curl -u : --negotiate -i "http://<router>:50071/webhdfs/v1/tmp/?op=LISTSTATUS"
(snip)
{"FileStatuses":{"FileStatus":[
{"accessTime":0,"blockSize":0,"childrenNum":0,"fileId":16387,"group":"supergroup","length":0,"modificationTime":1552016766769,"owner":"hdfs","pathSuffix":"tmp1","permission":"755","replication":0,"storagePolicy":0,"type":"DIRECTORY"}
]}}

The mount table is as follows:
$ hdfs dfsrouteradmin -ls /tmp
Mount Table Entries:
Source                    Destinations              Owner                     
Group                     Mode                      Quota/Usage              
/tmp                      ns1->/tmp                 aajisaka                  
users                     rwxr-xr-x                 [NsQuota: -/-, SsQuota: -/-]
/tmp/tmp1                 ns1->/tmp/tmp1            aajisaka                  
users                     rwxr-xr-x                 [NsQuota: -/-, SsQuota: -/-]
/tmp/tmp2                 ns2->/tmp/tmp2            aajisaka                  
users                     rwxr-xr-x                 [NsQuota: -/-, SsQuota: -/-]

Without trailing thrash, two directories are listed.
$ curl -u : --negotiate -i "http://<router>:50071/webhdfs/v1/tmp?op=LISTSTATUS"
(snip)
{"FileStatuses":{"FileStatus":[
{"accessTime":1541753421917,"blockSize":0,"childrenNum":0,"fileId":0,"group":"supergroup","length":0,"modificationTime":1541753421917,"owner":"hdfs","pathSuffix":"tmp1","permission":"777","replication":0,"storagePolicy":0,"symlink":"","type":"DIRECTORY"},
{"accessTime":1541753429812,"blockSize":0,"childrenNum":0,"fileId":0,"group":"supergroup","length":0,"modificationTime":1541753429812,"owner":"hdfs","pathSuffix":"tmp2","permission":"777","replication":0,"storagePolicy":0,"symlink":"","type":"DIRECTORY"}
]}}

[~ajisakaa] Thanks for reporting this, I borrowed the text from 
HDFS-13972



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