Ismaël Mejía created BEAM-8384:
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             Summary: Spark runner is not respecting spark.default.parallelism 
user defined configuration
                 Key: BEAM-8384
                 URL: https://issues.apache.org/jira/browse/BEAM-8384
             Project: Beam
          Issue Type: Bug
          Components: runner-spark
    Affects Versions: 2.16.0
            Reporter: Ismaël Mejía
            Assignee: Ismaël Mejía


It was reported in [the mailing 
list|https://lists.apache.org/thread.html/792fb7fc2a5113837fbcdafce6a5d9100309881b366c1a7163d2c898@%3Cdev.beam.apache.org%3E]
 that the Spark runner is not respecting the user defined Spark default 
parallelism configuration. We should investigate and if it is the case ensure 
that a user defined configuration is always respected. Runner optimizations 
should apply only for default (unconfigured) values otherwise we will confuse 
users and limit them from parametrizing Spark for their best convenience.



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