自定义SentinelGlobalResourceInterceptor,偶发出现 ErrorEntryFreeException

[Qsir-Q]

`public class SentinelGlobalResourceInterceptor implements HandlerInterceptor {

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws BlockException {
    Object attrVal = request.getAttribute(SentinelConstants.SENTINEL_GLOBAL_RESOURCE_REQUEST_ATTRIBUTE_NAME);
    if (attrVal == null) {
        Entry entry = SphU.entry(SentinelConstants.SENTINEL_GLOBAL_RESOURCE_NAME, ResourceTypeConstants.COMMON_WEB, EntryType.IN);
        request.setAttribute(SentinelConstants.SENTINEL_GLOBAL_RESOURCE_REQUEST_ATTRIBUTE_NAME, entry);
    }
    return true;
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
    Object objectEntry = request.getAttribute(SentinelConstants.SENTINEL_GLOBAL_RESOURCE_REQUEST_ATTRIBUTE_NAME);
    Entry entry = objectEntry == null ? null : (Entry) objectEntry;
    if (entry == null) {
        return;
    }
    if (ex != null) {
        Tracer.traceEntry(ex, entry);
    }
    entry.exit();
    request.removeAttribute(SentinelConstants.SENTINEL_GLOBAL_RESOURCE_REQUEST_ATTRIBUTE_NAME);
}

}`

使用HandlerInterceptor 自定义了一个全局资源，用以控制整个服务的总体流量；

偶发出现com.alibaba.csp.sentinel.ErrorEntryFreeException: The order of entry exit can't be paired with the order of entry, current entry in context: global, but expected: global

理论上一个请求对应一个线程，不太可能出现并发情况重复创建global-resource 的entry；

目前观察下来是容器重启时高发，但不确定是否和重启强相关;

环境： sentinel:1.8.7 springboot:2.1.18