我正在尝试使用带有scala的spark使用sbt来传输twitter数据，一切顺利，但我有一个问题：
这是我的buld.sbt：
import Assembly._
import AssemblyPlugin._
name := "TwitterSparkStreaming"
version := "0.1"
scalaVersion := "2.12.3"
libraryDependencies ++= Seq(
"org.apache.spark" % "spark-core_2.11" % "1.5.2",
"org.apache.spark" % "spark-sql_2.11" % "1.5.2",
"org.apache.spark" % "spark-streaming_2.11" % "1.5.2",
"org.apache.spark" % "spark-streaming-twitter_2.11" % "1.6.3",
"joda-time" %% "joda-time" % "2.9.1",
"org.twitter4j" % "twitter4j-core" % "3.0.3",
"org.twitter4j" % "twitter4j-stream" % "3.0.3",
"edu.stanford.nlp" % "stanford-corenlp" % "3.5.2",
"edu.stanford.nlp" % "stanford-corenlp" % "3.5.2" classifier "models"
)
resolvers += "Akka Repository" at "http://repo.akka.io./releases/"
assemblyMergeStrategy in assembly := {
case PathList("META-INF", xs @ _*) => MergeStrategy.discard
case x => MergeStrategy.first
}
这是包含org.apache.spark.Logging的类：
import org.apache.log4j.{Logger, Level}
import org.apache.spark.Logging
object LogUtils extends Logging{
def setStreamingLogLevels(): Unit ={
val log4jInitialized = Logger.getRootLogger.getAllAppenders.hasMoreElements
if(!log4jInitialized)
{
logInfo("Setting log level to [WARN] for streaming example." + " To override add a custom log4j.properties to the classpath.")
Logger.getRootLogger.setLevel(Level.WARN)
}
}
}
这是我出现的错误：
Exception in thread "main" java.lang.NoSuchMethodError: org.apache.spark.Logging.$init$(Lorg/apache/spark/Logging;)V
at LogUtils$.<init>(LogUtils.scala:4)
at LogUtils$.<clinit>(LogUtils.scala)
at TwitterStreaming$.main(TwitterStreaming.scala:30)
at TwitterStreaming.main(TwitterStreaming.scala)
我能知道如何解决这个问题吗？
注意：我尝试将org.apache.spark依赖项从2.2.0更改为1.5.2，但问题是相同的
1 回答
我不确定为什么这段代码会出错 . 但是有一种更好的方法可以在Spark中设置日志级别 .
请参阅链接https://spark.apache.org/docs/latest/api/java/org/apache/spark/SparkContext.html#setLogLevel-java.lang.String-
Spark在sparkContext级别有方法，所以你可以调用，