线程"main"中的异常java.lang.NoClassDefFoundError:org/apache/spark/sql/SQLContext [英] Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/sql/SQLContext
问题描述
我正在使用IntelliJ 2016.3版本.
I am using IntelliJ 2016.3 version.
import sbt.Keys._
import sbt._
object ApplicationBuild extends Build {
object Versions {
val spark = "1.6.3"
}
val projectName = "example-spark"
val common = Seq(
version := "1.0",
scalaVersion := "2.11.7"
)
val customLibraryDependencies = Seq(
"org.apache.spark" %% "spark-core" % Versions.spark % "provided",
"org.apache.spark" %% "spark-sql" % Versions.spark % "provided",
"org.apache.spark" %% "spark-hive" % Versions.spark % "provided",
"org.apache.spark" %% "spark-streaming" % Versions.spark % "provided",
"org.apache.spark" %% "spark-streaming-kafka" % Versions.spark
exclude("log4j", "log4j")
exclude("org.spark-project.spark", "unused"),
"com.typesafe.scala-logging" %% "scala-logging" % "3.1.0",
"org.slf4j" % "slf4j-api" % "1.7.10",
"org.slf4j" % "slf4j-log4j12" % "1.7.10"
exclude("log4j", "log4j"),
"log4j" % "log4j" % "1.2.17" % "provided",
"org.scalatest" %% "scalatest" % "2.2.4" % "test"
)
尽管我正确地提到了所有依赖项,但我一直低于运行时例外.
I have been getting below run time exception., even though i mentioned all the dependencies correctly as shown above.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/sql/SQLContext
at example.SparkSqlExample.main(SparkSqlExample.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: org.apache.spark.sql.SQLContext
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 6 more
在此网络上进行了更多调查.发现这主要是由于 buld.sbt
中的条目不适当或版本不匹配.请建议我在这里做错了什么?
Investigated more on this web.And found that this is mainly due to in-appropriate entries in buld.sbt
or version mismatches.But in my case everything looks good as shown above.
Please suggest where did i do wrong here?
推荐答案
我想这是因为您将依赖项标记为已提供",但显然您(或IDEA)没有提供它们.
I guess this is because you marked your dependencies as "provided", but apparently you (or IDEA) don't provide them.
尝试删除提供的"选项或(我的首选方式):将带有主方法的类移至 src/test/scala
Try to remove the "provided" option or (my preferred way): move the class with the main method to src/test/scala
这篇关于线程"main"中的异常java.lang.NoClassDefFoundError:org/apache/spark/sql/SQLContext的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!