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https://issues.apache.org/jira/browse/FLINK-35039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17842230#comment-17842230
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Yu Chen commented on FLINK-35039:
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Hi [~wczhu] , sorry for the late response.
It does surprise me that YARN doesn't support POST. But I have a confusing
point: POST requests are already used in many places in the Flink interfaces,
such as Stop-with-savepoint. Are these interfaces currently not accessible on
YARN?
Moreover, according to the principles of RESTful Interface [1], the biggest
difference between POST and PUT is that PUT requests are idempotent, the same
request is submitted N times and the result is still the same, but the
Profiling interface should be a new request each time and the result will be
added to the server.
Therefore, POST may be more in line with the semantics of this interface.
So I wonder if it is appropriate to do this compatibility in Flink. WDYT
[~yunta] ?
[1] https://restfulapi.net/rest-put-vs-post/
!image-2024-04-30-11-12-34-734.png|width=414,height=496!
> Create Profiling JobManager/TaskManager Instance failed
> -------------------------------------------------------
>
> Key: FLINK-35039
> URL: https://issues.apache.org/jira/browse/FLINK-35039
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Web Frontend
> Affects Versions: 1.19.0
> Environment: Hadoop 3.2.2
> Flink 1.19
> Reporter: JJJJude
> Assignee: JJJJude
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2024-04-08-10-21-31-066.png,
> image-2024-04-08-10-21-48-417.png, image-2024-04-08-10-30-16-683.png,
> image-2024-04-30-11-12-34-734.png, image-2024-04-30-11-14-44-335.png
>
>
> I'm test the "async-profiler" feature in version 1.19, but when I submit a
> task in yarn per-job mode, I get an error when I click Create Profiling
> Instance on the flink Web UI page.
> !image-2024-04-08-10-21-31-066.png!
> !image-2024-04-08-10-21-48-417.png!
> The error message obviously means that the yarn proxy server does not support
> *POST* calls. I checked the code of _*WebAppProxyServlet.java*_ and found
> that the *POST* method is indeed not supported, so I changed it to *PUT*
> method and the call was successful.
> !image-2024-04-08-10-30-16-683.png!
>
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