If I call fileSystemManager.resolveFile("jar: ... ") and the file was removed from cache, JarFileSystem calls method createFile(AbstractFileName name). This method is not overridden from ZipFileManager and works wrong (its return ZipFileObject instead JarFileObject). But i can override it and make return JarFileObject case this object won't have children and JarURLConnectionImpl won't work. It should reinvalidate cache and return the object with children objects.
I've added a patch to fix this problem.