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https://issues.apache.org/jira/browse/HDFS-13870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16701302#comment-16701302
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Hadoop QA commented on HDFS-13870:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
18s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 19m 
42s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
7s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
32m  0s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
56s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
11m 39s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
20s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 46m 43s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | HDFS-13870 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12949778/HDFS-13870.001.patch |
| Optional Tests |  dupname  asflicense  mvnsite  |
| uname | Linux 0fe731d38db9 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 
17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / f657a2a |
| maven | version: Apache Maven 3.3.9 |
| Max. process+thread count | 401 (vs. ulimit of 10000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/25655/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> WebHDFS: Document ALLOWSNAPSHOT and DISALLOWSNAPSHOT
> ----------------------------------------------------
>
>                 Key: HDFS-13870
>                 URL: https://issues.apache.org/jira/browse/HDFS-13870
>             Project: Hadoop HDFS
>          Issue Type: Task
>          Components: documentation, webhdfs
>            Reporter: Siyao Meng
>            Assignee: Siyao Meng
>            Priority: Minor
>         Attachments: HDFS-13870.001.patch
>
>
> Adding ALLOWSNAPSHOT and DISALLOWSNAPSHOT (since 2.8.0, HDFS-9057) to WebHDFS 
> REST API 
> [doc|https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html].
> Below are my examples of the APIs:
> {code:bash}
> # ALLOWSNAPSHOT uses http method PUT.
> curl -X "PUT" 
> "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=ALLOWSNAPSHOT&user.name=hdfs"
> Response on success:
> HTTP/1.1 200 OK
> Content-Type: application/octet-stream
> {code}
> {code:bash}
> # DISALLOWSNAPSHOT uses http method PUT.
> curl -X "PUT" 
> "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=DISALLOWSNAPSHOT&user.name=hdfs"
> Response on success:
> HTTP/1.1 200 OK
> Content-Type: application/octet-stream
> {code}
> Note: GETSNAPSHOTDIFF and GETSNAPSHOTTABLEDIRECTORYLIST are already 
> documented.
> {code:bash}
> # GETSNAPSHOTDIFF uses GET.
> curl 
> "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTDIFF&user.name=hdfs&oldsnapshotname=snap1&snapshotname=snap2"
> Response on success (example):
> HTTP/1.1 200 OK
> Content-Type: application/json
> {"SnapshotDiffReport":{"diffList":[{"sourcePath":"","type":"MODIFY"},{"sourcePath":"newfile.txt","type":"CREATE"}],"fromSnapshot":"snapOld","snapshotRoot":"/snaptest","toSnapshot":"snapNew"}}
> {code}
> {code:bash}
> # GETSNAPSHOTTABLEDIRECTORYLIST uses GET.
> curl 
> "http://<SERVER>:<PORT>/webhdfs/v1/snaptest/?op=GETSNAPSHOTTABLEDIRECTORYLIST&user.name=hdfs"
> Response on success (example):
> HTTP/1.1 200 OK
> Content-Type: application/json
> {"SnapshottableDirectoryList":[{"dirStatus":{"accessTime":0,"blockSize":0,"childrenNum":0,"fileId":16392,"group":"supergroup","length":0,"modificationTime":1535151813500,"owner":"hdfs","pathSuffix":"snaptest","permission":"755","replication":0,"storagePolicy":0,"type":"DIRECTORY"},"parentFullPath":"/","snapshotNumber":2,"snapshotQuota":65536}]}
> {code}



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