You shouldn’t have to recompile Java 3D jars if you use the ones available here (actually, I just discovered that the links in my post of February 2017 have been out of date, since SourceForge.net forced me to move from CVS to SVN, but I just updated them).

I never tried to render an image with a plugin on a server but don’t see a reason why it couldn’t run. Did you try to render your image with the GUI first? And did you try with Sweet Home 3D 6.2 Jar?