Javafx 17 and moditect no longer working

Clemens Lanthaler clemens.lanthaler at
Fri Sep 10 10:47:54 UTC 2021

Hello everyone,

I have just updated from javafx 17-ea+14 to the GA release and I am not 
able to build one of my projects (PhotoSlide, librawFX, JeditFX, ...) 
anymore. The root cause is that via maven the it downloads for each 
component two files (e.g. javafx-base.jar nad javafx-base-mac.jar). The 
first one contains only the MANIFEST file and nothing more. The problem 
I have is that until ea+14 the MANIFEST file contained to 
automatic-module-name and therefore moditect or similar tools can pick 
this name up. Now the automatic module name is missing in this MANIFEST 
file and therefore moditect is no finding any module naming anymore and 
try to use the file name instatt. The problem is that this results in a 
module name "javafx.base" which is also defined in module-info.class 
inside of javafx-base-mac.jar. In this case moditect cannot proceed 
because of duplicate items.

Question from my side: Why is this extra jar file necessary ? If it is 
necessary is there a possability to get back the automatic-module-nam 
entry in the MANIFEST file ?


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