java.lang.NoClassDefFoundError

tip

A few things cause this exception: 1) Check if you have all jars and if they're in the correct path when running. 2) Your classpath might be broken, you can define it in the command line with "java -cp yourClassPath" or at your IDE if you're using one.

tip

Needs to add netty-transport-native-epoll with a OS classifier to the classpath, it's not included in netty-all

tip

This might be an issue with the file location in the Spark submit command. Try it with "spark-submit --master spark://master:7077 hello_world_from_pyspark.py {file location}"

You have a different solution? A short tip here would help you and many other users who saw this issue last week.

  • help with ShiroOnSwing
    via by ayoub belkas,
  • ClassNotFoundException found in Log4j 2.0
    via Stack Overflow by venkyMCA
    ,
  • ClassNotFoundException found in Log4j 2.0
    via by Unknown author,
  • exception while using excel workbook
    via Stack Overflow by Pooja Mahawar
    ,
    • java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at org.apache.log4j.LogManager.getLogger(LogManager.java:74) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:81) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:329) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:349) at com.mjsecurity.ShiroJ2SEApp.<clinit>(ShiroJ2SEApp.java:25) Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 17 more

    Users with the same issue

    Unknown visitor1 times, last one,
    Unknown visitor1 times, last one,
    Unknown visitor1 times, last one,
    Unknown visitor1 times, last one,
    Unknown visitor1 times, last one,
    1499 more bugmates