GitHub user kennknowles opened a pull request:

    https://github.com/apache/incubator-beam/pull/1409

    [BEAM-25] Temporarily reject stateful ParDo in SparkRunner (until support 
is added)

    Be sure to do all of the following to help us incorporate your contribution
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    ---
    
    R: @amitsela 
    
    At present, the user-facing API for stateful `DoFn` is in the codebase but 
prevented from use. It is `ParDo.of(...)` that rejects stateful `DoFn`. In 
#1399 I am removing this rejection, so I need to add it to all runners until 
they support the API.
    
    I have also added a JUnit category so runners can exclude this from their 
`RunnableOnService` test suites.


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

    $ git pull https://github.com/kennknowles/incubator-beam SparkRunner-state

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

    https://github.com/apache/incubator-beam/pull/1409.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 #1409
    
----
commit 8d715689dd5283b7b180c0b9ec4e188abba140f5
Author: Kenneth Knowles <k...@google.com>
Date:   2016-11-21T23:41:13Z

    Add JUnit category for stateful ParDo tests

commit b0d07d74f7805ee1d30fdedf54c089790d63d898
Author: Kenneth Knowles <k...@google.com>
Date:   2016-11-16T05:33:13Z

    Reject stateful DoFn in SparkRunner

----


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