Duplicate Notifications Delivered through FC

リポジトリのファイルもテストも指定されていません。FirebaseMessaging.getInstance.send の呼び出しから始め、サーバーのメッセージ ID と送信ログを Notification Service Extension の受信ログと比較してください。重複が SDK、Firebase Cloud Messaging、または下流の配信のどこで発生しているのかを、再現可能な検証または文書化された外部要因によって特定できれば完了です。

Environment:

• Operating System version: Java 8
• Firebase SDK version: 10.11.0
• Library version: 8.1.0
• Firebase Product: messaging (auth, database, storage, etc)

Problem:

We're seeing multiple instances of a single message being sent via Cloud Messaging using the Firebase Admin SDK, and users seeing duplicates on iOS. We have logs both on the server side, directly before and after on the server side, and on the client side upon receipt in a Notification Service Extension.

We've verified through these logs (tied to data from user screenshots), that the message is sent only once on our server, we receive a success response from the Firebase SDK, and the user receives that exact notification twice.

Server Logs:

16:08:16.542 | al-pool-2228 |  INFO | w.SendNotificationWorker$ | 303 | 31ec5101-b43e-4519-99a1-9bb3650471c7: Successfully sent notification 2273480
16:08:16.537 | al-pool-7377 |  INFO | .n.NotificationDispatcher | 342 | Notification id 2273480 sent status true
16:08:16.537 | al-pool-7377 |  INFO | c.s.f.s.FirebaseService$  | 158 | Submitted notification to Firebase with messageId: projects/{redacted}/messages/{redacted} for notification id: 2273480
16:08:16.336 | al-pool-4602 |  INFO | w.SendNotificationWorker$ |  92 | 31ec5101-b43e-4519-99a1-9bb3650471c7: Sending notification 2273480

Client Logs:

16:08:21.092 AM -0700 |	INFO | {redacted} | NotificationService | did receive notification | notificationId = 2273480
16:08:21.091 AM -0700	| INFO | {redacted} | NotificationService | did receive notification | notificationId = 2273480

Relevant Code:

val messageId = FirebaseMessaging.getInstance.send(messageBuilder.build)
logger.info(s"Submitted notification to Firebase with messageId: $messageId for notification id: ${notificationId
          .getOrElse(0L)}")