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https://issues.apache.org/jira/browse/HDFS-12654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16327000#comment-16327000
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Masatake Iwasaki commented on HDFS-12654:
-----------------------------------------
Hi [~Nuke], could you explain the way to reproduce the issue? I got the same
result for webhdfs and httpfs when I tested this on 3.1.0-SNAPSHOT.
{noformat}
$ curl -X POST -T README.txt -L -i
"http://localhost:9870/webhdfs/v1/tmp/README.txt?op=APPEND";
HTTP/1.1 100 Continue
HTTP/1.1 404 Not Found
Date: Tue, 16 Jan 2018 10:41:24 GMT
Cache-Control: no-cache
Expires: Tue, 16 Jan 2018 10:41:24 GMT
Date: Tue, 16 Jan 2018 10:41:24 GMT
Pragma: no-cache
X-FRAME-OPTIONS: SAMEORIGIN
Content-Type: application/json
Transfer-Encoding: chunked
{"RemoteException":{"exception":"FileNotFoundException","javaClassName":"java.io.FileNotFoundException","message":"File
/tmp/README.txt not found."}}[centos@ip-172-32-1-195 hadoop-3.1.0-SNAPSHOT]$
{noformat}
{noformat}
$ curl -X POST -i --header "Content-Type:application/octet-stream"
--data-binary @README.txt
'http://localhost:14000/webhdfs/v1/tmp/README.txt?op=APPEND&user.name=centos&data=true'
HTTP/1.1 100 Continue
HTTP/1.1 404 Not Found
Date: Tue, 16 Jan 2018 10:42:17 GMT
Cache-Control: no-cache
Expires: Tue, 16 Jan 2018 10:42:17 GMT
Date: Tue, 16 Jan 2018 10:42:17 GMT
Pragma: no-cache
Set-Cookie:
hadoop.auth="u=centos&p=centos&t=simple-dt&e=1516135337720&s=ZDSoknG+/x/a6XnGLAVUyUBs6vE=";
Path=/; HttpOnly
Content-Type: application/json
Transfer-Encoding: chunked
{"RemoteException":{"message":"Failed to append to non-existent file
\/tmp\/README.txt for client
127.0.0.1","exception":"FileNotFoundException","javaClassName":"java.io.FileNotFoundException"}}
{noformat}
> APPEND API call is different in HTTPFS and NameNode REST
> --------------------------------------------------------
>
> Key: HDFS-12654
> URL: https://issues.apache.org/jira/browse/HDFS-12654
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs, httpfs, namenode
> Affects Versions: 2.6.0, 2.7.0, 2.8.0, 3.0.0-beta1
> Reporter: Andras Czesznak
> Priority: Major
>
> The APPEND REST API call behaves differently in the NameNode REST and the
> HTTPFS codes. The NameNode version creates the target file the new data being
> appended to if it does not exist at the time of the call issued. The HTTPFS
> version assumes the target file exists when APPEND is called and can append
> only the new data but does not create the target file it doesn't exist.
> The two implementations should be standardized, preferably the HTTPFS version
> should be modified to execute an implicit CREATE if the target file does not
> exist.
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