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  • Kafka + Flink 出现异常 java.lang.NoClassDefFoundError: org/apache/flink/streaming/util/serialization/DeserializationSchema

    我在 IDEA 环境中调试 Kafka+Flink 自己编写的例子时

    代码编译都是通过的,但是进行Debug调试时,出现如下异常;

    java.lang.NoClassDefFoundError: org/apache/flink/streaming/util/serialization/DeserializationSchema
    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.util.serialization.DeserializationSchema
    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)
    ... 7 more
    Disconnected from the target VM, address: '127.0.0.1:55548', transport: 'socket'
    Error: A JNI error has occurred, please check your installation and try again
    Exception in thread "main" 
    Process finished with exit code 1

    该配置maven的,也配置了,该加的jar也加了。

    死活就是无法DEBUG,启动报错,直接就不能启;

    找了很久原因,最终找到了原因:

    在 Run/ Edit Configurations 中勾选 Include dependencies with “Provided” scope,保存之后再运行就好了。

    搞定。

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  • 原文地址:https://www.cnblogs.com/alexgl2008/p/12387356.html
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