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https://issues.apache.org/jira/browse/FLINK-2989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14998474#comment-14998474
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Maximilian Michels commented on FLINK-2989:
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Should we allow both, GET and DELETE? Via DELETE we would support Rest-style
API calls if desired. For the cancel button we would use the GET interface to
support YARN properly.
> Job Cancel button doesn't work on Yarn
> --------------------------------------
>
> Key: FLINK-2989
> URL: https://issues.apache.org/jira/browse/FLINK-2989
> Project: Flink
> Issue Type: Bug
> Components: Webfrontend
> Reporter: Sachin Goel
>
> The newly added Cancel button doesn't work on Yarn, when accessing via Yarn
> Web Application proxy. It works fine when we're directly on the web monitor.
> The reason is Yarn doesn't allow DELETE requests to the AM yet. It should be
> enabled in 2.8.0. [YARN-2031, YARN-2084.]
> A workaround for now can be to use a {{GET}} method instead of {{DELETE}},
> but that breaks the conventions of REST.
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