In ABAP webdynpro you can use InteractiveForm control to achieve PDF render, as long as you specify the dataSource of PDF via context node, and form template uploaded via tcode SFP.
Open the local PDF, click the attachment icon as below, then you can find all types of useful information there:
the original form template
the runtime performance trace file (trace.txt)
the xml data file for the pdf (xfd.xml)
detail information raised by ADS server during PDF render time (error.pdf)
