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Flink 1.12.1 java.lang.NoClassDefFoundError: org/apache/flink/streaming/api/functions/source/SourceFunction

错误信息描述

使用Idea运行项目，抛出以下异常

java.lang.NoClassDefFoundError: org/apache/flink/streaming/api/functions/source/SourceFunction
	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.Class.getMethod0(Class.java:3018)
	at java.lang.Class.getMethod(Class.java:1784)
	at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.flink.streaming.api.functions.source.SourceFunction
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 7 more
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" 

解决方案一

修改pom文件，把里面与flink有关的scope为provided的代码行注释，类似以下效果

<!-- This dependency is provided, because it should not be packaged into the JAR file. -->
<dependency>
	<groupId>org.apache.flink</groupId>
	<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
	<version>${flink.version}</version>
	<!-- <scope>provided</scope> -->
</dependency>
<dependency>
	<groupId>org.apache.flink</groupId>
	<artifactId>flink-clients_${scala.binary.version}</artifactId>
	<version>${flink.version}</version>
	<!-- <scope>provided</scope> -->
</dependency>

刷新Maven依赖，重新运行项目

maven reimport

解决方案二

我使用的是Idea 2020.3，通过调整idea配置，支持在项目运行时，将Provided的依赖有效

进入Edit Configurations

选择Modify options，选择Use classpath of module

选择Inclue dependencies with "Provided" scope

Flink 1.12.1 NoClassDefFoundError SourceFunction

标签：文件   method   mis   api   lan   pen   gap   with   sso   

原文地址：https://www.cnblogs.com/fengzhentian/p/14853695.html