getting & setting spark.driver/executor.extraClassPath on EMR -

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as far can tell, when setting / using spark.driver.extraclasspath , spark.executor.extraclasspath on aws emr within spark-defaults.conf or elsewhere flag, have first existing value [...].extraclasspath set to, append :/my/additional/classpath in order work.

is there function in spark allows me to append additional class path retains/respects existing paths set emr in /etc/spark/conf/spark-defaults.conf?

no such "function" in spark but: on emr ami's can write bootstrap append/set whatever want in spark-defaults, of course affect spark jobs.

when emr moved newer "release-label" stopped working bootstrap-steps replaced configuration jsons , manual bootstraps run before applications installed ( @ least when tried )


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