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Add Logging to Detect FCM Message Deprioritization #12

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Add Logging to Detect FCM Message Deprioritization #12

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864acbe
Add logging to detect when/if FCM message de-prioritization happens
WesUnwin Nov 24, 2025
8b70bf3
Add comment about integer priority levels
WesUnwin Nov 24, 2025
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10 changes: 10 additions & 0 deletions src/android/CustomFCMReceiverPlugin.java
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Expand Up @@ -78,6 +78,16 @@ public boolean onMessageReceived(RemoteMessage remoteMessage) {
Log.d("CustomFCMReceiver", "onMessageReceived");
boolean isHandled = false;

int originalPriority = remoteMessage.getOriginalPriority();
int currentPriority = remoteMessage.getPriority(); // PRIORITY_HIGH = 1, PRIORITY_NORMAL = 2, PRIORITY_UNKNOWN = 0

if (originalPriority != currentPriority) {
Log.e(TAG, "onMessageReceived: MESSAGE DEPRIORITIZED! originalPriority: " + originalPriority + " currentPriority: " + currentPriority);
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@jerry2013 jerry2013 Nov 24, 2025

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is this collected somewhere that we can see?

how would this help us identifying problems unless the phone is being watched by a dev?

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@WesUnwin WesUnwin Nov 24, 2025

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We could additionally try to report errors/logs to Google play or appsignal or something.

This is still somewhat useful as we (devs) could attempt to run through reproduction steps, and use this to see what is happening to the message priority. Or if its someone like Sara or QA, we could (possibly) provide instructions on how to check logs.

Will try to think of something for that and propose something

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@WesUnwin WesUnwin Nov 24, 2025

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This is a general / existing problem with viewing android Logs against other people's including customers, QA, etc. devices.

I'll try to think of what we should do for that

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@jerry2013 jerry2013 Nov 24, 2025

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i use https://docs.appsignal.com/api/public-endpoint/errors.html in google-calendar add-on to collect data (created a separate appsignal "environment" for this purpose)

maybe it's an option for you too.

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@WesUnwin WesUnwin Jan 29, 2026 •
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Looking into this (sorry for the delay)...

// Note: apps running in the background have restrictions imposed on them:
// See doc: https://developer.android.com/develop/background-work/services/fgs/restrictions-bg-start
// When the message is deprioritized like this, this may result in issues later related to notifications, foreground services, etc.
}

try {
Map<String, String> data = remoteMessage.getData();
isHandled = inspectAndHandleMessageData(data);
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