apache spark - Error when creating a StreamingContext -

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i open spark shell

spark-shell --packages org.apache.spark:spark-streaming-kafka_2.10:1.6.0

then want create streaming context

import org.apache.spark._ import org.apache.spark.streaming._   val conf = new sparkconf().setmaster("local[2]").setappname("networkwordcount").set("spark.driver.allowmultiplecontexts", "true") val ssc = new streamingcontext(conf, seconds(1))

i run exception:

org.apache.spark.sparkexception: 1 sparkcontext may running in jvm (see spark-2243). ignore error, set spark.driver.allowmultiplecontexts = true. running sparkcontext created at:

when open spark-shell, there streaming context created. called sc, meaning not need create configure object. use existing sc object.

val ssc = new streamingcontext(sc,seconds(1))

instead of var use val


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