Github user dalaro commented on the issue: https://github.com/apache/incubator-tinkerpop/pull/325 To do that cleanly, users would have to write serializers against the shim interface. Of course, the shim is only relevant to users writing new serializers or willing to refactor their old ones. I see no clean way to make this work with existing serializers that users have hypothetically already compiled against TP's shaded Kryo. To make a user serializer written for TP's shaded Kryo link against Spark's unshaded Kryo is technically possible with some degree of skulduggery, it's just that all of the ways to do it that I'm aware of are unspeakably ugly.
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