“Workbench has not been created yet” error in eclipse plugin programming

问题

With my eclipse plugin launching, I got Root exception:java.lang.IllegalStateException: Workbench has not been created yet. error.

And it seems to cause side effect to make some bundle exception error. I don't think my code uses egit module.

org.osgi.framework.BundleException: Exception in org.eclipse.egit.ui.Activator.start() of bundle org.eclipse.egit.ui.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)

How can I remove this error? This is the code that accesses the workspace. I found this article - Debugging a failed Eclipse launch saying that it's race condition, but I'm not sure why I have race condition, and if so, how to remove it.

public void renameClassRefactor() throws CoreException {
    // get the project information with ResourcesPlugin
    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
    // 1. The name of the project in the workspace

    System.out.println(ResourcesPlugin.getWorkspace().toString());
    java.io.File workspaceDirectory = root.getLocation().toFile();
    System.out.println(workspaceDirectory.toString());

回答1:

I struggled a lot for “Workbench has not been created yet” the complete day.

But I got the solution by the following steps.-

Go to the Run configuration -> Remove all the target platform jars.
Click on add required bundles.
Check the org.apache.felix.gogo.runtime, org.apache.felix.gogo.shell, org.eclipse.equinox.console, org.eclipse.osgi and your jar file.
The last and important step. Go to Setting-> check the checkbox of "Clear the configuration area before launching".
Run the OSGi application now.
Enjoy if it works for you as it worked for me.