Month: May 2022

IDEA scala

When I run a single class of scala with Spark in IDEA, an error happens: java.lang.NoClassDefFoundError: org/apache/spark/SparkContextat 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.spark.SparkContextat java.net.URLClassLoader.findClass(URLClassLoader.java:382)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)… 7 moreError: A JNI error has occurred, please check your installation and try againException in thread “main”Process finished with exit code 1 Open…

Read More

IDEA 中 Excluded后解除

今天在IDEA中，一个目录被Excluded后，想要再次加入项目，怎么操作都不行，最后打开项目根目录下的 项目.iml文件，删除了其中的 <excludeFolder url=”file://$MODULE_DIR$/XXXX/builder” /> 后，builder目录恢复正常。

Read More