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  1. ,
    Expert 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}
    
    
  2. ,

    You are not deploying the oracle driver with the application. Place the driver jars in a shared or library extension folder of your application server. (You should go with option one or two though

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com.mysql.jdbc.Driver
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java.lang.ClassNotFoundException: com.mysql.jdbc.Driver	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:164)	at db.DBManager.connectToMYSQL(DBManager.java:62)	at ui.SelectDBForm.connectToDBButtonActionPerformed(SelectDBForm.java:157)	at ui.SelectDBForm.access$000(SelectDBForm.java:16)	at ui.SelectDBForm$1.actionPerformed(SelectDBForm.java:96)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)	at java.awt.Component.processMouseEvent(Component.java:5488)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)	at java.awt.Component.processEvent(Component.java:5253)	at java.awt.Container.processEvent(Container.java:1966)	at java.awt.Component.dispatchEventImpl(Component.java:3955)	at java.awt.Container.dispatchEventImpl(Container.java:2024)	at java.awt.Component.dispatchEvent(Component.java:3803)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)	at java.awt.Container.dispatchEventImpl(Container.java:2010)	at java.awt.Window.dispatchEventImpl(Window.java:1774)	at java.awt.Component.dispatchEvent(Component.java:3803)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)