解决办法:在 创建main文件夹和scala文件夹的时候,注意src与这两个文件夹不能同时设置为resources,否则就会产生报错,解决办法将src文件夹的resources取消,右键.

运行spark官方的graphx 示例 ComprehensiveExample.scala报错解决 在Idea中,直接运行ComprehensiveExample.scala,报需要指定master异常. 修改源码:指定master为local模式, val spark = SparkSession .builder .appName(s"${this.getClass.getSimpleName}").master("local[2]") .getOrCreat

一.情况描述 使用idea +scala+spark,运行程序代码如下: package cn.idcast.hello import org.apache.spark.rdd.RDD import org.apache.spark import org.apache.spark.SparkConf import org.apache.spark.SparkContext /** * Author itcast * Desc 演示Spark入门案例-WordCount */ object Wor

FROM: http://j-q-j.org/scala/scala-2-11-application-error.html 这两天学习scala,官网下载的最新版本2.11,书用的是<Programming in scala>,看到类和对象,这一章最后一段代码 1 2 3 4 5 import ChecksumAccumulator.calculate object FallWinterSpringSummer extends Application {   for (season <

报错背景: CDH集成kafka插件之后,启动kafka时就报出此错误. 报错现象: -- ::, ERROR state.change.logger: [Controller epoch=] Initiated state change from OfflinePartition to OnlinePartition failed kafka.common.NoReplicaOnlineException: No replica in ISR for partition __consumer_

报错背景: CDH中集成kafka的服务,解决完kafka的jar包报错之后重启,发现这个报错. 报错现象: java.lang.VerifyError: Instruction type does not match stack map Exception Details: Location: org/eclipse/jetty/servlet/ServletHandler.doStart()V @: putfield Reason: Type ]) is not assignable to

报错背景: CDH启动kafka的时候出现报错情况,并且报错的节点挂掉. 报错现象: Exiting Kafka due to fatal exception java.lang.AbstractMethodError: nl.techop.kafka.KafkaHttpMetricsReporter.logger()Lcom/typesafe/scalalogging/Logger; at kafka.utils.Logging$class.) at ) at ) at kafka.metri

报错背景: CDH中安装完成kafka的组件后不能成功启动,发现UI界面中的broker.id和服务器中的broker.id不一致, 因此更改了服务器中broker.id 但是更改完成之后还是报错. 报错现象: Fatal error during KafkaServer startup. Prepare to shutdown kafka.common.InconsistentBrokerIdException: Configured broker. doesn't match stored

spark用的是cdh spark-2.0.1 package main.scala import org.apache.spark.rdd.RDD import org.apache.spark.{SparkConf, SparkContext} /* Created by tomtang on 2016/12/16. */ object tomhelloworld { def FILE_NAME:String = "word_count_results_" def main(arg

可以打包的pom.xml: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

各种报错信息如下: java.lang.NoClassDefFoundError: scala/Function0 at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.C

遇到比较奇怪的问题,mvn项目中的main函数可以正常运行,但是test阶段出错,报错信息如下: Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.l

代码: 报错信息: java.lang.NoClassDefFoundError: scala/xml/MetaData 原因:确失jar包 <dependency> <groupId>org.scala-lang</groupId> <artifactId>scala-xml</artifactId> <version>2.11.0-M4</version></dependency>

scala的trait执行报错: 错误: 找不到或无法加载主类 cn.itcast.scala.`trait`.Children 原因:包名写成了trait,与trait关键字重名了: package cn.itcast.scala.`trait` 解决方法:将包名trait修改为其他名字,比如trait_demo

如果小于Int.max时他不会报错 def sumcount(str:String): Int ={ val ints = for(c <- str)yield { println(c.asInstanceOf[Int]) ; c.asInstanceOf[Int]} println(ints.reduce(_*_)) println(Int.MaxValue) ints.sum } sumcount("Hello") 721011081081118251528962147483

环境: openSUSE42.2 hadoop2.6.0-cdh5.10.0 spark1.6.0-cdh5.10.0 按照网上的spark安装教程安装完之后,启动spark-shell,出现如下报错: 报错信息: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream at org.apache.spark.deploy.SparkSubmitA

1. 使用127.0.0.1启动生产和消费进程: 1)启动生产者进程: bin/kafka-console-producer.sh --broker-list 127.0.0.1:9092 --topic test 输入消息: this is msg 生产者进程报错: [2016-06-03 11:33:47,934] WARN Bootstrap broker 127.0.0.1:9092 disconnected (org.apache.kafka.clients.NetworkClient

spark 2.1.1 一 问题重现 问题代码示例 object MethodPositionTest { val sparkConf = new SparkConf().setAppName("MethodPositionTest") val sc = new SparkContext(sparkConf) val spark = SparkSession.builder().enableHiveSupport().getOrCreate() def main(args : Arra

spark 2.1.1 一 问题重现 spark-submit --master local[*] --class app.package.AppClass --jars /jarpath/zkclient-0.3.jar --driver-memory 1g app.jar 报错 Java HotSpot(TM) 64-Bit Server VM warning: Setting CompressedClassSpaceSize has no effect when compressed cl

kafka0.8.1 一 问题 10月22号应用系统忽然报错: [2014/12/22 11:52:32.738]java.net.SocketException: 打开的文件过多 [2014/12/22 11:52:32.738]       at java.net.Socket.createImpl(Socket.java:447) [2014/12/22 11:52:32.738]       at java.net.Socket.connect(Socket.java:577) [201

最近用yarn cluster方式提交spark任务时,有时会报错,报错几率是40%,报错如下: 18/03/15 21:50:36 116 ERROR ApplicationMaster91: User class threw exception: org.apache.spark.sql.AnalysisException: java.lang.NoSuchFieldError: HIVE_MOVE_FILES_THREAD_COUNT; org.apache.spark.sql.Analy