error:Selection is not within a valid module

when i try to run my jsp files in eclipse bundle with glass fish, this error prompt out, what is the p开发者_开发技巧roblem?

As mentioned in this thread, this could be relate to bug 154833:

The current handling of project modules is such that the project name must match the deploy-name in the .settings/org.eclipse.wst.common.component for "everything" to work correctly.
If they don't match, I believe the symptom you are experiencing is one of the "things" that goes wrong.

That's it.
I was able to work around this problem by checking out the shared project into a project with the identical name as the original.
I no longer get the error