I am trying to access the streaming tweets from Spark Streaming.
This is the software configuration.
Ubuntu 14.04.2 LTS
scala -version
Scala code runner version 2.11.7 -- Copyright 2002-2013, LAMP/EPFL
spark-submit --version
Spark version 1.6.0
Following is the code.
object PrintTweets
{
def main(args: Array[String]) {
// Configure Twitter credentials using twitter.txt
setupTwitter()
// Set up a Spark streaming context named "PrintTweets" that runs locally using
// all CPU cores and one-second batches of data
val ssc = new StreamingContext("local[*]", "PrintTweets", Seconds(1))
// Get rid of log spam (should be called after the context is set up)
setupLogging()
// Create a DStream from Twitter using our streaming context
val tweets = TwitterUtils.createStream(ssc, None)
// Now extract the text of each status update into RDD's using map()
val statuses = tweets.map(status => status.getText())
// Print out the first ten
statuses.print()
// Kick it all off
ssc.start()
ssc.awaitTermination()
}
}
Utilities.scala
object Utilities {
/** Makes sure only ERROR messages get logged to avoid log spam. */
def setupLogging() = {
import org.apache.log4j.{Level, Logger}
val rootLogger = Logger.getRootLogger()
rootLogger.setLevel(Level.ERROR)
}
/** Configures Twitter service credentials using twiter.txt in the main workspace directory */
def setupTwitter() = {
import scala.io.Source
for (line <- Source.fromFile("./data/twitter.txt").getLines) {
val fields = line.split(" ")
if (fields.length == 2) {
System.setProperty("twitter4j.oauth." + fields(0), fields(1))
}
}
}
}
Issues:
Since it needs the twitter4j library, i have added
twitter4j-core-4.0.4, twitter4j-stream-4.0.4 in eclipse build path as external jars.
Then i ran the program, it didnt throw any error. But the tweets not appearing in console. It were empty.
So i see some forums and downgraded twitter4j to 3.0.3. Also in Eclipse i chosen Scala 2.10 Library container in Build Path window.
After that i got java.lang.NoSuchMethodError run-time error.
16/05/14 11:46:01 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)
java.lang.NoSuchMethodError: twitter4j.TwitterStream.addListener(Ltwitter4j/StreamListener;)V
at org.apache.spark.streaming.twitter.TwitterReceiver.onStart(TwitterInputDStream.scala:72)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:148)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:130)
at org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:575)
at org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:565)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1992)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1992)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:89)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Please help me to resolve this. Initially i have installed spark by built using Scala 2.11. Is that the problem. Do i need uninstall everything and re-install Scala 2.10, then Spark pre-compiled package.
Or apart from Scala 2.11, do i need to have Scala 2.10 in my system?
local[*]
setting. After i changed it tolocal[2]
, i am able to see the tweets. I thinklocal[*]
is not able to acquire enough threads for processing the input streaming tweets.