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From "Aviem Zur (JIRA)" <j...@apache.org>
Subject [jira] [Created] (BEAM-1810) Spark runner combineGlobally uses Kryo serialization
Date Sat, 25 Mar 2017 18:47:41 GMT
Aviem Zur created BEAM-1810:
-------------------------------

             Summary: Spark runner combineGlobally uses Kryo serialization
                 Key: BEAM-1810
                 URL: https://issues.apache.org/jira/browse/BEAM-1810
             Project: Beam
          Issue Type: Bug
          Components: runner-spark
            Reporter: Aviem Zur
            Assignee: Amit Sela


{{TransformTranslator#combineGlobally}} uses Kryo serialization to serialize data. This should
never happen.

This is due to Spark's implementation of {{RDD.isEmpty}} which takes the first element to
check if they are elements in the {{RDD}}, it is then serialized with Spark's configured serializer
(In our case, Kryo).



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