....

src/main/java/cn/com/qmth/examcloud/web/upyun/UpYunClient.java

@@ -96,6 +96,7 @@ public class UpYunClient {
 	public UpYunClient(String bucketName, String userName, String password, String domain) {
 		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
 		cm.setMaxTotal(1000);
+		cm.setDefaultMaxPerRoute(20);
 		httpclient = HttpClients.custom().setConnectionManager(cm).disableAutomaticRetries()
 				.build();
 		requestConfig = RequestConfig.custom().setConnectionRequestTimeout(2000)