[jira] [Created] (FLINK-4787) Add REST API call for cancel-with-savepoints

[Shang Yuanchun (Jira)]

Ufuk Celebi created FLINK-4787:
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             Summary: Add REST API call for cancel-with-savepoints
                 Key: FLINK-4787
                 URL: https://issues.apache.org/jira/browse/FLINK-4787
             Project: Flink
          Issue Type: Improvement
          Components: Webfrontend
            Reporter: Ufuk Celebi


As a follow up to FLINK-4717, expose the cancel-with-savepoint command via the REST API.

{code}
/jobs/:jobid/cancel-with-savepoint/
/jobs/:jobid/cancel-with-savepoint/:targetDirectory
{code}

The first command goes to the default savepoint directory, the second one uses the given target directory.

The calls need to be async, as triggering a savepoint can take some time. For this, the handlers return a {{201 (Accepted)}} response with the location of the status, e.g. {{/jobs/:jobid/cancel-with-savepoint/in-progress/:id}}.

The user has to check that location until the final savepoint path is returned.




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