cloud_firestore: ^3.1.9 - The service is currently unavailable. This is a most likely a transient condition and may be corrected by retrying with a backoff

[swarupa-v]

I am trying to fetch data from firestore cache in my flutter application and I get the following error.
The service is currently unavailable. This is a most likely a transient condition and may be corrected by retrying with a backoff.
This is not happening consistently and happens only when offline and fetching data from cache.

Any help will be appreciated.

Flutter version details:
Flutter 2.10.3 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 7e9793dee1 (5 weeks ago) • 2022-03-02 11:23:12 -0600
Engine • revision bd539267b4
Tools • Dart 2.16.1 • DevTools 2.9.2

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[cherylEnkidu]

Hi swarupa-v, in order to better assist you, could you please provide a minimum repro app together with instructions for reproducing the bug? Also, it will be helpful if you can enable the debug logging and provide us some logs :)

[swarupa-v]

I have a firebase query that is fetching data :
Source source = Source.cache;
var collection = _firestoreInstance!.collection('Checklist');

var docSnapshot = await collection.doc(id).get(GetOptions(source: source));

Following is the debug log:
Unhandled Exception: [cloud_firestore/unavailable] The service is currently unavailable. This is a most likely a transient condition and may be corrected by retrying with a backoff.
E/flutter (18630): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607)
E/flutter (18630): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:177)
E/flutter (18630):
E/flutter (18630): #2 MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:377)
E/flutter (18630):
E/flutter (18630): #3 MethodChannelDocumentReference.get (package:cloud_firestore_platform_interface/src/method_channel/method_channel_document_reference.dart:68)
E/flutter (18630):
E/flutter (18630): #4 _JsonDocumentReference.get (package:cloud_firestore/src/document_reference.dart:146)
E/flutter (18630):
E/flutter (18630): #5 FirestoreService.getChecklist (package:riskmemo/services/firestoreservice.dart:1206)
E/flutter (18630):
E/flutter (18630): #6 TemplateSectionsPageState.getTemplateSections (package:riskmemo/pages/templates/templatesectionlist.dart:417)
E/flutter (18630):
E/flutter (18630):
E/flutter (18630): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: [cloud_firestore/unavailable] The service is currently unavailable. This is a most likely a transient condition and may be corrected by retrying with a backoff.
E/flutter (18630): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607)
E/flutter (18630): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:177)
E/flutter (18630):
E/flutter (18630): #2 MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:377)
E/flutter (18630):
E/flutter (18630): #3 MethodChannelDocumentReference.get (package:cloud_firestore_platform_interface/src/method_channel/method_channel_document_reference.dart:68)
E/flutter (18630):
E/flutter (18630): #4 _JsonDocumentReference.get (package:cloud_firestore/src/document_reference.dart:146)
E/flutter (18630):
E/flutter (18630): #5 FirestoreService.updateTagsOfCompany (package:riskmemo/services/firestoreservice.dart:1019)
E/flutter (18630):
E/flutter (18630):

[cherylEnkidu]

Hi swarupa-v,
The logs you currently provide is not so helpful. You probably need to enable Firestore debug logging by calling setLoggingEnabled.

[swarupa-v]

This option setLoggingEnabled we did not find in Flutter. Any suggestion from your end would be helpful.

[cherylEnkidu]

Hi swarupa-v,
Unfortunately my team doesn’t know much about Flutter. What I can suggest is posting your issue in https://github.com/firebase/flutterfire, some experts there might be able to give you some help :)

[cherylEnkidu]

Also you cannot connect to the backend during offline. So another thing you can try is, when fetching data during offline, specify {source: cache} or whatever Flutter equivalent is.