@GetMapping("/async")
@ResponseBody
public DeferredResult async() {
Long timeout = 1000 * 10L;
DeferredResult deferredResult = new DeferredResult<>
(timeout, error("请求超时"));
new Thread(() -> {
try {
Thread.sleep(1000 * 15);
} catch (InterruptedException e) {
e.printStackTrace();
}
deferredResult.setResult(success("异步操作完成"));
}).start();
return deferredResult;
}

出错信息：
org.apache.shiro.UnavailableSecurityManagerException: No SecurityManager accessible to the calling code, either bound to the org.apache.shiro.util.ThreadContext or as a vm static singleton.