Question

我正在尝试编写一个简单的程序，以便在Spark SQL中将数据从HBase加载到Dataframe。某个旧版本的Spark正在偷偷摸摸，我收到了错误..请告知

Caused by: java.lang.NoClassDefFoundError: org/apache/spark/Logging

主程序

object LoadHBase {
  def main(args: Array[String]): Unit = {
    val sparkSession = SparkSession.builder().appName("HBase-Demo").master("local[*]").getOrCreate()
    val sqlContext = sparkSession.sqlContext
    val dataset = sqlContext.read.format("org.apache.hadoop.hbase.spark").options(Map(
      "hbase.columns.mapping" -> "KEY_FIELD STRING :key, A_FIELD STRING c:a, B_FIELD STRING c:b",
      "hbase.table" -> "default:employee"
    )).load()
    dataset.createOrReplaceTempView("temp_emp")
    sqlContext.sql("SELECT count(*) from temp_emp").show()
  }
}

build.sbt

name := "scalaworks"

version := "1.0"

scalaVersion := "2.11.0"

resolvers += "Cloudera Repo" at "https://repository.cloudera.com/artifactory/cloudera-repos"

libraryDependencies += "org.apache.spark" % "spark-core_2.11" % "2.2.0"

libraryDependencies += "org.apache.spark" % "spark-streaming_2.11" % "2.2.0"

libraryDependencies += "org.apache.spark" % "spark-mllib_2.11" % "2.2.0"

libraryDependencies += "org.apache.spark" % "spark-sql_2.11" % "2.2.0"

libraryDependencies += "org.apache.hbase" % "hbase-server" % "1.2.0-cdh5.10.0"

libraryDependencies += "org.apache.hbase" % "hbase-client" % "1.2.0-cdh5.10.0"

libraryDependencies += "org.apache.hbase" % "hbase-common" % "1.2.0-cdh5.10.0"

libraryDependencies += "org.apache.hbase" % "hbase-spark" % "1.2.0-cdh5.10.0"

错误堆栈跟踪

Caused by: java.lang.NoClassDefFoundError: org/apache/spark/Logging
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$21$$anonfun$apply$12.apply(DataSource.scala:533)

    ... 7 more
Caused by: java.lang.ClassNotFoundException: org.apache.spark.Logging
    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)
    ... 26 more

**更新**

Spark 2.0上不支持Spark on Hbase

在Spark SQL中加载HBase表 - NoClassDefFoundError：org / apache / spark / Logging

0 个答案: