Hi,

looks like there is no Flink jar in the classpath with which you run your 
program. You need to make sure that they relevant jars are there or else your 
program cannot find Flinkā€™s classes, leading to a ClassNotFoundException.

Best,
Stefan

> Am 16.10.2016 um 19:26 schrieb Kaepke, Marc <marc.kae...@haw-hamburg.de>:
> 
> Hi guys,
> 
> I followed this guide 
> (https://ci.apache.org/projects/flink/flink-docs-release-1.2/quickstart/java_api_quickstart.html
>  
> <https://ci.apache.org/projects/flink/flink-docs-release-1.2/quickstart/java_api_quickstart.html>),
>  but I get an Exception if I run WordCount 
> 
> /usr/lib/jvm/java-8-oracle/bin/java -Didea.launcher.port=7536 
> -Didea.launcher.bin.path=/home/marc/Programs/idea-IC-162.2032.8/bin 
> -Dfile.encoding=UTF-8 -classpath 
> "/usr/lib/jvm/java-8-oracle/jre/lib/charsets.jar:/usr/lib/jvm/java-8-oracle/jre/lib/deploy.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/cldrdata.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/dnsns.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/jaccess.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/jfxrt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/localedata.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/nashorn.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/sunec.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/zipfs.jar:/usr/lib/jvm/java-8-oracle/jre/lib/javaws.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jce.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfr.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfxswt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jsse.jar:/usr/lib/jvm/java-8-oracle/jre/lib/management-agent.jar:/usr/lib/jvm/java-8-oracle/jre/lib/plugin.jar:/usr/lib/jvm/java-8-oracle/jre/lib/resources.jar:/usr/lib/jvm/java-8-oracle/jre/lib/rt.jar:/home/marc/apache
>  
> flink/flink.gelly/target/classes:/home/marc/Programs/idea-IC-162.2032.8/lib/idea_rt.jar"
>  com.intellij.rt.execution.application.AppMain 
> haw.bachelor.flink.gelly.WordCount
> Exception in thread "main" java.lang.NoClassDefFoundError: 
> org/apache/flink/api/common/functions/FlatMapFunction
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:264)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:123)
> Caused by: java.lang.ClassNotFoundException: 
> org.apache.flink.api.common.functions.FlatMapFunction
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> ... 3 more
> 
> 
> my environment:
> Ubuntu 14.04 LTS
> Oracle Java 8
> Maven 3.0.5
> intellij communityedition
> 
> 
> thanks for help
> Marc

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