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Error: Only one SparkContext may be running in this JVM

Expert Contributor

I am trying to run some spark streaming examples online. But even before I start, I'm getting this error

Only one SparkContext may be running in this JVM (see SPARK-2243). To ignore this error, set spark.driver.allowMultipleContexts = true. The currently running SparkContext was created at:
org.apache.spark.SparkContext.<init>(SparkContext.scala:82)

I tried this below but doesn't help.

conf.set("spark.driver.allowMultipleContexts","true");

Sample code I was trying to run in HDP 2.5

import org.apache.spark._
import org.apache.spark.streaming._

val conf = new SparkConf().setAppName(appName).setMaster(master)
val ssc = new StreamingContext(conf, Seconds(1))
1 ACCEPTED SOLUTION

Accepted Solutions

Re: Error: Only one SparkContext may be running in this JVM

Hi @Adnan Alvee,

Are you using spark-shell? if yes the spark context is already generated for you (as 'sc') and you don't need to create a new one, you should be able to directly go with:

val ssc = new StreamingContext(sc, Seconds(1))

View solution in original post

2 REPLIES 2

Re: Error: Only one SparkContext may be running in this JVM

Hi @Adnan Alvee,

Are you using spark-shell? if yes the spark context is already generated for you (as 'sc') and you don't need to create a new one, you should be able to directly go with:

val ssc = new StreamingContext(sc, Seconds(1))

View solution in original post

Re: Error: Only one SparkContext may be running in this JVM

Expert Contributor

oh! that worked. Thanks a lot!