Google App Engine ERROR Throttling refreshCfg with Gcloud MySQL instance - mysql

Question

Continuous failed connection attempts errors are occurring in Google Cloud MySQL running on Google APP Engine with public IP.
These are some of the logs:
receiveTimestamp resource.labels.module_id resource.labels.project_id resource.labels.version_id resource.labels.zone resource.type severity textPayload timestamp
2021-06-08T05:48:43.497385728Z zzzzzzzzzz xxxxxxx 4 eu5 gae_app ERROR Throttling refreshCfg(xxxxxxx:europe-west1:yyyyyyyyy): it was only called 80.802µs ago 2021-06-08T05:48:43.494284Z
2021-06-08T05:19:08.394840567Z zzzzzzzzzz xxxxxxx 4 eu5 gae_app ERROR Throttling refreshCfg(xxxxxxx:europe-west1:yyyyyyyyy): it was only called 42.519µs ago 2021-06-08T05:19:08.391909Z
2021-06-08T05:13:42.889911567Z zzzzzzzzzz xxxxxxx 4 eu5 gae_app ERROR Throttling refreshCfg(xxxxxxx:europe-west1:yyyyyyyyy): it was only called 73.279µs ago 2021-06-08T05:13:42.888659Z
2021-06-08T04:47:07.470804269Z zzzzzzzzzz xxxxxxx 4 eu5 gae_app ERROR Throttling refreshCfg(xxxxxxx:europe-west1:yyyyyyyyy): it was only called 85.928µs ago 2021-06-08T04:47:07.467377Z
I tried some different configurations of max_connections, pool_size, pool_timeout with no success.
I have consulted this previous Issue.
And this documentation.
Some help would be appreciated.
More information. The error is always preceded by this warning in the log record:
"protoPayload": {
"#type": "type.googleapis.com/google.cloud.audit.AuditLog",
"status": {},
"authenticationInfo": {
"principalEmail": "bbbbbbbb#appspot.gserviceaccount.com",
"serviceAccountDelegationInfo": [
{
"firstPartyPrincipal": {
"principalEmail": "app-engine-appserver#prod.google.com"
}
}
]
},
"requestMetadata": {
"callerIp": "2600:1900:2001:12::8",
"requestAttributes": {
"time": "2021-06-09T05:59:27.400680Z",
"auth": {}
},
"destinationAttributes": {}
},
"serviceName": "cloudsql.googleapis.com",
"methodName": "cloudsql.instances.connect",
"authorizationInfo": [
{
"resource": "instances/aaaaaaaaaaa",
"permission": "cloudsql.instances.connect",
"granted": true,
"resourceAttributes": {}
}
],
"resourceName": "instances/aaaaaaaaa",
"request": {
"project": "bbbbbbb",
"#type": "type.googleapis.com/google.cloud.sql.v1beta4.SqlInstancesCreateEphemeralCertRequest",
"instance": "zzzzzzzzz",
"body": {}
},
"response": {
"#type": "type.googleapis.com/google.cloud.sql.v1beta4.SslCert",
"kind": "sql#sslCert"
}
},
"insertId": "-rgtsssssssssss",
"resource": {
"type": "cloudsql_database",
"labels": {
"region": "europe-west1",
"project_id": "bbbbbbbb",
"database_id": "aaaaaaaaaaaaaaa"
}
},
"timestamp": "2021-06-09T05:59:27.381352Z",
"severity": "NOTICE",
"logName":
"projects/demosmf/logs/cloudaudit.googleapis.com%2Factivity",
"receiveTimestamp": "2021-06-09T05:59:27.746071609Z"
I think it has something to do with the management of ssl certificates.
I have verified that the application certificates are valid and have not expired

Answer 1

This error has been reported via Google's Public Issue Tracker.
You can follow the thread I mentioned above to track the progress.