flink 本地_在本地执行示例Flink程序
我试图在本地模式下执行Apache Flink中的示例程序。在本地执行示例Flink程序
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.util.Collector;
public class WordCountExample {
public static void main(String[] args) throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet text = env.fromElements(
"Who's there?",
"I think I hear them. Stand, ho! Who's there?");
//DataSet text1 = env.readTextFile(args[0]);
DataSet> wordCounts = text
.flatMap(new LineSplitter())
.groupBy(0)
.sum(1);
wordCounts.print();
env.execute();
env.execute("Word Count Example");
}
public static class LineSplitter implements FlatMapFunction> {
@Override
public void flatMap(String line, Collector> out) {
for (String word : line.split(" ")) {
out.collect(new Tuple2(word, 1));
}
}
}
}
这是给我的例外：
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/InputFormat
at WordCountExample.main(WordCountExample.java:10)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapreduce.InputFormat
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 1 more
我在做什么错？
我也使用了正确的罐子。 弗林克的Java-0.9.0-里程碑 - 1.jar 弗林克的客户端-0.9.0-里程碑 - 1.jar 弗林克核-0.9.0-里程碑 - 1.jar
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你到底该如何执行程序？您是通过CLI客户端还是Web提交客户端从IDE运行它？ –
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我正在从IDE运行它，将它作为普通的Java应用程序运行。 –
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正如文档中给出的那样，我可以在本地模式下直接在桌面上运行它 –