Missing JavaDoc and failing "Go to Declaration" in Maven projects

[Tobias Oelgarte <to...@gmail.com>]

Im running Netbeans 11.1 on Linux with Maven projects. I have downloaded 
the sources and javadoc for my dependencies (for example 
jetty-server-10.0.0-alpha0) and ensured that they are stored with the 
right name. But I'm unable to view the JavaDocs of most constructors and 
methods from my dependencies, with the error message "Javadoc not 
found". Additionally I can't go to the declarations. Netbeans opens the 
source file, but can't go to the declaration for some reason ("The 
destination was not found, source opened at default position"), even so 
the Navigator is able to show all methods.

This always happens if one maven dependency makes use of another 
dependency/library. For example:
- org.eclipse.jetty.server.Server(int port) is fine. (Javadoc will be 
displayed and Go to is working)
- org.eclipse.jetty.server.Server(ThreadPool pool) fails. (ThreadPool is 
a class from another library/module)

Some way to fix this, or is this a known issue?

-- 
Tobias Oelgarte
Mail: tobias.oelgarte@gmail.com