修改

src/main/java/com/nuojing/media/auth/service/impl/MediaAuthServiceImpl.java

@@ -283,6 +283,22 @@ public class MediaAuthServiceImpl implements MediaAuthService {
         long[] existing = processedAuthCodes.putIfAbsent(key, processing);
         if (existing != null) {
             if (existing[1] == PROCESSING) {
+                // 浏览器/网关可能因首次处理超时而重发同一回调，这里等待首个请求完成并复用其结果
+                long deadline = System.currentTimeMillis() + 15_000L;
+                long[] done = existing;
+                while (done != null && done[1] == PROCESSING && System.currentTimeMillis() < deadline) {
+                    try {
+                        Thread.sleep(500L);
+                    } catch (InterruptedException ie) {
+                        Thread.currentThread().interrupt();
+                        break;
+                    }
+                    done = processedAuthCodes.get(key);
+                }
+                if (done != null && done[1] != PROCESSING && done[1] > 0) {
+                    log.info("{} authorization callback duplicated, return first result after waiting, authCode={}", media.getName(), authCode);
+                    return done[0];
+                }
                 throw new BusinessException(429, media.getName() + "授权回调处理中，请稍后重试");
             }
             if (System.currentTimeMillis() - existing[1] < PROCESSED_TTL_MS) {