how solve launching Talend open studio Errors?

I have already installed the talend open studio for a month and suddenly when I open it last morning it gives this error

java.lang.NoClassDefFoundError: org/eclipse/jdt/core/JavaCore at org.talend.designer.runprocess.java.JavaProcessorUtilities.getTalendJavaProject(JavaProcessorUtilities.java:99) at org.talend.designer.runprocess.DefaultRunProcessService.getTalendProcessJavaProject(DefaultRunProcessService.java:514) at org.talend.designer.runprocess.RunProcessService.getTalendProcessJavaProject(RunProcessService.java:356) at org.talend.designer.runprocess.DeleteAllJobWhenStartUp$1.run(DeleteAllJobWhenStartUp.java:85) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313) at org.talend.designer.runprocess.DeleteAllJobWhenStartUp.earlyStartup(DeleteAllJobWhenStartUp.java:136) at org.talend.designer.runprocess.DeleteAllJobWhenStartUp.startup(DeleteAllJobWhenStartUp.java:56) at org.talend.designer.runprocess.RunProcessService.deleteAllJobs(RunProcessService.java:228) at org.talend.core.CoreService.deleteAllJobs(CoreService.java:318) at org.talend.core.repository.model.ProxyRepositoryFactory.logOnProject(ProxyRepositoryFactory.java:1879) at org.talend.repository.ui.login.LoginHelper$1.run(LoginHelper.java:426) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)

How can I deal with please...thanks?

Solution 1:

If you read logs (TOS_DI-20170623_1246-V6.4.1\workspace.metadata.log), you can see

Caused by: org.eclipse.core.internal.resources.ResourceException: Could not read metadata for 'C:\Programmation\TOS_DI-20170623_1246-V6.4.1\workspace.metadata.plugins\org.eclipse.core.resources.root.indexes\properties.index'. Unexpected version: 0. at org.eclipse.core.internal.localstore.Bucket.load(Bucket.java:303) at org.eclipse.core.internal.properties.PropertyBucket.load(PropertyBucket.java:258) at org.eclipse.core.internal.localstore.Bucket.load(Bucket.java:274) at org.eclipse.core.internal.localstore.BucketTree.loadBucketFor(BucketTree.java:115) at org.eclipse.core.internal.properties.PropertyManager2.getProperty(PropertyManager2.java:134) at org.eclipse.core.internal.resources.Resource.getPersistentProperty(Resource.java:1205) at org.eclipse.jdt.internal.core.JavaModelManager.loadVariablesAndContainers(JavaModelManager.java:3265) at org.eclipse.jdt.internal.core.JavaModelManager.startup(JavaModelManager.java:5036) at org.eclipse.jdt.core.JavaCore.start(JavaCore.java:5651) at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:771) at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:764) ... 21 more

I just removed 'TOS_DI-20170623_1246-V6.4.1\workspace.metadata.plugins\org.eclipse.core.resources.root.indexes\properties.index' and it worked well