GitHub user tillrohrmann opened a pull request:

    https://github.com/apache/flink/pull/5430

     [FLINK-8605] [rest] Enable job cancellation from the web UI

    ## What is the purpose of the change
    
    In order to support the job cancellation from the web UI, including when 
using
    Yarn, we have to register the JobTerminationHandler under 
/jobs/:jobid/yarn-cancel
    and /jobs/:jobid/yarn-stop. This is just a temporary fix until we can send
    arbitrary REST verbs through the Yarn proxy.
    
    ## Brief change log
    
    - Introduce `YarnCancelJobTerminationHeaders`
    - Introduce `YarnStopJobTerminationHeaders`
    - Register `JobTerminationHandler` with default `TerminationMode#CANCEL` 
under `YarnCancelJobTerminationHeaders`
    - Register `JobTerminationHandler` with default `TerminationMode#STOP` 
under `YarnStopJobTerminationHeaders`
    
    ## Verifying this change
    
    - Added `YarnCancelJobTerminationHeadersTest` and 
`YarnStopJobTerminationHeadersTest`
    - Tested manually
    
    ## Does this pull request potentially affect one of the following parts:
    
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
      - The serializers: (no)
      - The runtime per-record code paths (performance sensitive): (no)
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
      - The S3 file system connector: (no)
    
    ## Documentation
    
      - Does this pull request introduce a new feature? (no)
      - If yes, how is the feature documented? (not applicable)


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tillrohrmann/flink enableWebJobCancellation

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/5430.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5430
    
----
commit 216876ae1d3fd0509bd5591576d9d4c960c1aa80
Author: Till Rohrmann <trohrmann@...>
Date:   2018-02-06T18:11:53Z

    [hotfix] Change shutdown order in WebMonitorEndpoint to avoid illegal state

commit f906423456b0f42c46213584b91d7c75321289c5
Author: Till Rohrmann <trohrmann@...>
Date:   2018-02-08T12:43:09Z

    [FLINK-8604] [rest] Move JobTerminationHandler into WebMonitorEndpoint
    
    Register the JobTerminationHandler at the WebMonitorEndpoint to make it 
accessible to
    all REST endpoints.

commit e5a80cc4a2c676c08de65cc1d68c2e4937b5f499
Author: Till Rohrmann <trohrmann@...>
Date:   2018-02-07T11:35:58Z

    [FLINK-8605] [rest] Enable job cancellation from the web UI
    
    In order to support the job cancellation from the web UI, including when 
using
    Yarn, we have to register the JobTerminationHandler under 
/jobs/:jobid/yarn-cancel
    and /jobs/:jobid/yarn-stop. This is just a temporary fix until we can send
    arbitrary REST verbs through the Yarn proxy.

----


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