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ClientException: Connection closed before full header was received #291
Description
Describe the bug
When executing multiple firestore queries, few queries fail with below exceptions:
{"severity":"ERROR","message":"ClientException: Connection closed before full header was received, uri=https://firestore.googleapis.com/v1/projects/{project-id}/databases/(default)/documents:runQuery\npackage:http/src/io_client.dart 229:7 IOClient.send\npackage:googleapis_auth/src/auth_http_utils.dart 43:22 AuthenticatedClient.send\npackage:google_cloud_rpc/service_client.dart 149:22 ServiceClient._makeStreamingRequest\n"}
Aggregate Count Query:
ClientException: Connection closed before full header was received, uri=https://firestore.googleapis.com/v1/projects/{project-id}/databases/(default)/documents/{collection}/{document-id}:runAggregationQuery
Where Query:
ClientException: Connection closed before full header was received, uri=https://firestore.googleapis.com/v1/projects/{project-id}/databases/(default)/documents:runQuery
I'm executing around 3K queries simultaneously using Future.wait
To Reproduce
import 'package:firebase_admin_sdk/firebase_admin_sdk.dart';
import 'package:firebase_functions/firebase_functions.dart';
void main() {
runFunctions((firebase) {
firebase.https.onRequest(name: 'clientException', (request) async {
final arr = List.generate(3000, (index) => index);
final firestore = FirebaseApp.instance.firestore();
await Future.wait(
arr.map((index) {
return firestore
.collection('numbers')
.where('number', .equal, index)
.limit(1)
.get();
}),
eagerError: true,
);
return .ok('Yay! Client Exception did not occur.');
});
});
}
Expected behavior
No exception should be thrown randomly. The same code works in nodejs without any exceptions.
Activity
demolaf commentedon Jul 1, 2026
Hi @OutdatedGuy thanks for raising this. I was able to reproduce this and currently investigating, i'll keep this issue up to date.
fix(firestore): retry query and aggregation reads on transient connec…
fix(firestore): retry query and aggregation reads on transient connec…