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From balidani <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-1514][Gelly] Add a Gather-Sum-Apply ite...
Date Mon, 23 Feb 2015 14:08:35 GMT
Github user balidani commented on the pull request:

    Hi @vasia!
    Thanks for the review! I started making the changed, but I got stuck. I get an exception
about `GatherUdf` not being Serializable. I tried copying from `VertexCentricIteration` and
I'm not sure what's the difference that causes the exception.
    Here is the full stack trace: https://gist.github.com/balidani/e6f716d3562d2aa131fb
    Here is `GatherSumApplyIteration.java`: https://gist.github.com/balidani/1139eddcb1b4cbf60404
    The GatherUdf is at the end. I didn't bother fully converting the Sum and Apply UDFs,
because I already get an exception for gather.
    What exactly is `ResultTypeQueryable`? Does it have anything to do with Serializability?
Should we implement this with all UDFs, just like in `VertexCentricIteration`?

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