in AreaTreeHandler, if no fo:root was found in document (which can arise from time to time when you use fo together with xslt), the endDocument() method throws a nullpointerexception instead of making clean fallback (either generate empty document or throw a SAXException). Because NullPointerException is quite anonymous error, it makes it difficult for caller to properly catch it and handle it in calling code. Please note javadoc of endDocument states that it "throws SAXException if there is some error". So this probably should be throwing a SAXException("no fo:root found in document") Caused by: java.lang.NullPointerException at org.apache.fop.area.AreaTreeHandler.endDocument(AreaTreeHandler.java:264) at org.apache.fop.fo.FOTreeBuilder.endDocument(FOTreeBuilder.java:171) at net.sf.saxon.event.ContentHandlerProxy.close(ContentHandlerProxy.java:255) at net.sf.saxon.event.ImplicitResultChecker.close(ImplicitResultChecker.java:69) at net.sf.saxon.event.ProxyReceiver.close(ProxyReceiver.java:86) at net.sf.saxon.event.ComplexContentOutputter.close(ComplexContentOutputter.java:458) at net.sf.saxon.Controller.transformDocument(Controller.java:1655) at net.sf.saxon.Controller.transform(Controller.java:1438)
Created attachment 21159 [details] Patch that solves the issue Submited patch that properly solves the issue. fop creates correct pdf that has no page in it (only metadatas)
Patch applied. Thanks. http://svn.apache.org/viewvc?rev=596600&view=rev I couldn't reproduce the NPE but the change makes sense if it helps you.
batch transition pre-FOP1.0 resolved+fixed bugs to closed+fixed