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com.here.platform.data.client.spark

DataClientSparkContextUtils

object DataClientSparkContextUtils

Utility class to initialize and hold shared resource required by DataClient.

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  6. lazy val context: DataClientSparkContext

    Context holder with shared resources used by DataClient.

    Context holder with shared resources used by DataClient.

    This context must be always stored in local variable inside the node closure, otherwise, spark will try to serialize the object:

    rdd.mapPartitions { _  =>
    val dataClientContext = DataClientSparkContextUtils.context
    val catalogApi = DataClient(dataClientContext.actorSystem).queryApi(localHrn)
    ...
  
}

    Calling 

    Await.ready(CoordinatedShutdown(actorSystem).run(UnknownReason), 15.seconds)

    is not required but recommended. It will allow akka to finish jobs and release resources before JVM hard kill the daemon threads.

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