user Patrick Stahle reports:
We have a relatively heavily threaded application which is calling pdfbox to stamp certain
pdf files. We have been in production for a little over a week and have run into a few threads
getting stuck. The stack trace is the following:
We seem to be getting stuck in PDFont classes HashMap which is unsynchronized class.
We are using "PDType1Font.HELVETICA".
The problem is that for the standard 14 fonts, each font is a singleton, but its code is being used multithreaded, so we have to secure that.