Я создал веб-сервлет в следующем примере:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try{
FopFactory fopFactory = FopFactory.newInstance(new File(".").toURI());
//Setup a buffer to obtain the content length
ByteArrayOutputStream out = new ByteArrayOutputStream();
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, out);
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(new StreamSource(PATH_TO_XSL));
//Make sure the XSL transformation's result is piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
//Setup input
Source src = new StreamSource(new File("./resources/Employees.xml"));
//Start the transformation and rendering process
transformer.transform(src, res);
//Prepare response
response.setContentType("application/pdf");
response.setContentLength(out.size());
//Send content to Browser
response.getOutputStream().write(out.toByteArray());
response.getOutputStream().flush();
}catch(Exception e){
e.printStackTrace();
}
}
Howerver, когда я останавливаю tomcat, я получаю утечку памяти. Что я смог найти в журналах:
SEVERE [http-nio-8080-exec-4] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [fop] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lan
g.ThreadLocal@294d3ff4]) and a value of type [org.apache.xerces.parsers.SAXParser] (value [org.apache.xerces.parsers.SAXParser@af83efc]) but failed to remove it when the web application was stopped. Threads are going to be renewed over t
ime to try and avoid a probable memory leak.
Что я пробовал:
Force System.gc(); in contextDestroyed метод ServletContext.
Любые идеи как я могу решить эту проблему? Утечка памяти происходит после того, как я остановил tomcat.