Bug#341101: eclipse-platform-common: Eclipse Help not working - Solution!

[Markus Bauer]

>   If a manifest file or plugin.xml is ever changed, you must run
> "eclipse -clean" to clear the cache.

This is exactly the solution.

I was now able to reproduce the bug by restoring a backup of an old
version of my eclipse configuration.
As before starting the help resulted in the NoClassDefFoundError.

Then I started "eclipse -clean" and the help system is working again.

So I assume that when I switched from the original eclipse build to the
Debian version old plugin data where still cached in the configuration.
And "eclipse -clean" caused eclipse to recognize the new plugin data.

Thanks for your help!
Markus