Hey there,
using FOP for quite some time now, thanks everyone for all the fine development. Iam running FOP 2.0 embedded into a Servlet on Tomcat 8.0.x with Java8 on a Windows Machine (server 2012 R2). Usually we have no problems but from time to time during the transformation org.apache.xalan.transformer.TransformerImpl.transform() process an Out of Memory Error occurs. When trying to recreate the problem with the same XML and same XSL we have no problems; the process takes a very short time (<100ms) and uses not much memory (<50MB). The application is configured so it can cosume up to 12GB(!) of RAM so it looks like some indefinite looping is going on, but unfortunately i have no further logs at this time to help me with the investigation. This is why i wanted to put the transformation into a seperate Thread and supervise it and kill it off if a certain timeout is reached, however iam not able to. So the question is can you think of any way to stop this processing? I have implemented the multithreading here with FutureTasks but can switch to just Threads easily, too. It would be better to kill off the Thread before it throws an Out of Memory error and with this affecting the whole Servlet so that subsequent requests cannot be processed anymore. Naturally it would be best to find the source of the problem, of course, but that can take me some time and i would like to have a fallback solution instead with forcefully stopping the Transformation. Hope someone is able to help me out with this; thanks in advance and best Greetings Normen
