[resolved] Getting an Error Classnotfound Exception

[Anonymous]

Hi All,
I have to connect to Mysql database i have done the connection in metadata.
but when i try to retrieve the schema i get an error.
I took tmysqlinput and wrote select * from table_name query and click on guess schema option it is showing me an error like :
java.lang.classnotfoundexception org.gjt.mm.mysql.driver
please suggest me what to do.
Thanking you,
with regards,
Akash S.

[Anonymous]

Read the .... manual!
The Talend studio release starting with 5.3.1 does not ship the Open Source database drivers. You have to load the -so called modules - by your self. There are a convenient dialog in the Module view.
The driver must be find its way to <studio>/lib/java dir.

[Anonymous]

Hello Sir,
Thank you for your valuable response and time .
If i understood you correctly so I need to install the driver for the same.. right ..?
and which are the drivers that i need to install to run this and from where should i get those drivers .
Thanks in Advance.
with kind regards,
Akash S.

[Anonymous]

Hi,
Please refer to online document Identify required external modules and Install external modules.
Best regards
Sabrina

[Anonymous]

Hello xdshi,
Thank you for your help It is working fine now .
with kind regards,
Akash S.

[Anonymous]

Hi,
Thanks for your feedback, don't hesitate to post your issue on forum.
Best regards
Sabrina

[Anonymous]

hi xdshi,
I am facing the same issue even after installing the modules.
below is the error.
Connection failure. You must change the Database Settings.
java.lang.RuntimeException: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
at org.talend.core.model.metadata.builder.database.JDBCDriverLoader.getConnection(JDBCDriverLoader.java:179)
at org.talend.core.model.metadata.builder.database.ExtractMetaDataUtils.connect(ExtractMetaDataUtils.java:1034)
at org.talend.core.model.metadata.builder.database.ExtractMetaDataFromDataBase.testConnection(ExtractMetaDataFromDataBase.java:300)
at org.talend.repository.ui.utils.ManagerConnection.check(ManagerConnection.java:293)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm.checkConnection(DatabaseForm.java:2008)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm.access$39(DatabaseForm.java:1933)
at org.talend.repository.ui.wizards.metadata.connection.database.DatabaseForm$23.widgetSelected(DatabaseForm.java:2261)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at org.talend.repository.ui.actions.metadata.CreateConnectionAction.doRun(CreateConnectionAction.java:207)
at org.talend.repository.ui.actions.AContextualAction$2.run(AContextualAction.java:611)
at org.talend.repository.RepositoryWorkUnit.executeRun(RepositoryWorkUnit.java:93)
at org.talend.core.repository.model.AbstractRepositoryFactory.executeRepositoryWorkUnit(AbstractRepositoryFactory.java:237)
at org.talend.repository.localprovider.model.LocalRepositoryFactory.executeRepositoryWorkUnit(LocalRepositoryFactory.java:3197)
at org.talend.core.repository.model.ProxyRepositoryFactory.executeRepositoryWorkUnit(ProxyRepositoryFactory.java:1979)
at org.talend.repository.ui.actions.AContextualAction.run(AContextualAction.java:617)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.talend.rcp.intro.Application.start(Application.java:145)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
Caused by: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
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 java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.talend.core.model.metadata.builder.database.JDBCDriverLoader.getConnection(JDBCDriverLoader.java:129)
... 48 more

[Anonymous]

Hi scmalshah,
What build version you're using? Did you get this exception when set up MySql DB connection?
Have you checked document TalendHelpCenter:Configuring Talend Studio as I mentioned in previous post?
Best regards
Sabrina

[_AnonymousUser]

Hi i am getting error while running jsp program, can any one help pls...
error connecting driver: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver

[Anonymous]

In / using Talend???? This is jar not found error... MySQL driver is not accessible to your code
Vaibhav