java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

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    java-samples.com | 1 year ago
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    Schema Workbench 3.0.4 requires the working directory set to be the directory where it is installed. If you do not, you get a ClassNotFoundException error on the database driver when trying to make a DB connection. The terminal output is: 15:22:05,513 ERROR [JDBCMetaData] Database connection exception : ClassNotFoundException : com.mysql.jdbc.Driver 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 mondrian.gui.JDBCMetaData.initConnection(JDBCMetaData.java:105) at mondrian.gui.JDBCMetaData.<init>(JDBCMetaData.java:75) at mondrian.gui.Workbench.resetWorkbench(Workbench.java:1562) at mondrian.gui.Workbench.toolbarPreferencesButtonActionPerformed(Workbench.java:1037) at mondrian.gui.Workbench.access$800(Workbench.java:59) at mondrian.gui.Workbench$23.actionPerformed(Workbench.java:551) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258) at javax.swing.AbstractButton.doClick(AbstractButton.java:302) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1051) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1092) at java.awt.Component.processMouseEvent(Component.java:5517) at javax.swing.JComponent.processMouseEvent(JComponent.java:3135) at java.awt.Component.processEvent(Component.java:5282) at java.awt.Container.processEvent(Container.java:1966) at java.awt.Component.dispatchEventImpl(Component.java:3984) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Component.dispatchEvent(Component.java:3819) 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:1791) at java.awt.Component.dispatchEvent(Component.java:3819) 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) The solution is to cd into the directory first: $ cd /opt/pentaho/workbench $ sh workbench.sh More detail at http://wiki.bizcubed.com.au:8080/xwiki/bin/view/Pentaho+Tutorial/Troubleshooting+GUI+tools#HCheckworkingdirectory This is similar to PMD-458 and PRD-1034.

    Pentaho BI Platform Tracking | 8 years ago | Sridhar Dhanapalan
    java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

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Root Cause Analysis

  1. java.lang.ClassNotFoundException

    com.mysql.jdbc.Driver

    at java.net.URLClassLoader$1.run()
  2. Java RT
    Class.forName
    1. java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    2. java.security.AccessController.doPrivileged(Native Method)
    3. java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    4. java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    5. sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
    6. java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    7. java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
    8. java.lang.Class.forName0(Native Method)
    9. java.lang.Class.forName(Class.java:164)
    9 frames
  3. db
    DBManager.connectToMYSQL
    1. db.DBManager.connectToMYSQL(DBManager.java:62)
    1 frame
  4. ui
    SelectDBForm$1.actionPerformed
    1. ui.SelectDBForm.connectToDBButtonActionPerformed(SelectDBForm.java:157)
    2. ui.SelectDBForm.access$000(SelectDBForm.java:16)
    3. ui.SelectDBForm$1.actionPerformed(SelectDBForm.java:96)
    3 frames
  5. Java RT
    EventDispatchThread.run
    1. javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
    2. javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
    3. javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
    4. javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
    5. javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
    6. java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
    7. java.awt.Component.processMouseEvent(Component.java:5488)
    8. javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
    9. java.awt.Component.processEvent(Component.java:5253)
    10. java.awt.Container.processEvent(Container.java:1966)
    11. java.awt.Component.dispatchEventImpl(Component.java:3955)
    12. java.awt.Container.dispatchEventImpl(Container.java:2024)
    13. java.awt.Component.dispatchEvent(Component.java:3803)
    14. java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
    15. java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
    16. java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
    17. java.awt.Container.dispatchEventImpl(Container.java:2010)
    18. java.awt.Window.dispatchEventImpl(Window.java:1774)
    19. java.awt.Component.dispatchEvent(Component.java:3803)
    20. java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
    21. java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
    22. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
    23. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
    24. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
    25. java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
    25 frames