[jira] [Created] (SPARK-15993) PySpark RuntimeConfig should be immutable

["Vladimir Feinberg (JIRA)" <ji...@apache.org>]

Vladimir Feinberg created SPARK-15993:
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             Summary: PySpark RuntimeConfig should be immutable
                 Key: SPARK-15993
                 URL: https://issues.apache.org/jira/browse/SPARK-15993
             Project: Spark
          Issue Type: Improvement
          Components: PySpark
    Affects Versions: 2.0.0
            Reporter: Vladimir Feinberg
            Priority: Trivial


{{pyspark.sql.RuntimeConfig}} should be immutable because changing its value does nothing, which only leads to a confusing API (I tried to change a config param by extracting the config of a running {{SparkSession}}, but failed to realize I need to relaunch it).

Furthermore, {{RuntimeConfig}} is unlike {{SparkConf}} in that it can't ever be used to specify a configuration when building a {{SparkSession}} anyway - it's only purpose is to figure out an existing session's params.



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