MemoryFileSystem losts contents of files all DRL scripts become "empty" if directory contains a space character

Create directory with space character. Put any *.drl files there. private KieContainer createKieContainer() throws IOException { final KieServices kieServices = KieServices.get(); final KieFileSystem fs = kieServices.newKieFileSystem(); // iterate all files ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver(); final Resource[] resources = resourcePatternResolver.getResources(baseDirectory + "*.drl" ); for (Resource res : resources) { logger.info( "Add file to build " + res.getFilename()); fs.write(ResourceFactory.newUrlResource(res.getURL())); } KieBuilder kieBuilder = kieServices.newKieBuilder(fs); kieBuilder.buildAll(); KieModule kieModule = kieBuilder.getKieModule(); return kieServices.newKieContainer(kieModule.getReleaseId()); } then try to use createKieContainer() - no rules exist.