Problem
Environment
- External HTTPs load balancer
Solution
- Contact Google Cloud support to disable HTTP/2 for the load balancer VIP.
Cause
There is a bug that is seen often with Android clients, if the client is using OkHttp and connecting using HTTP/2. You can see the public issue here. Issue are found in OkHttp3 and OkHttp4.
As explained in the documentation, the error code indicates that the connection to the client was broken before the load balancer sent any response.
Before filing a support case, confirm that backend_service_name: "" for the logs that are returning the error using the following query:
resource.type="http_load_balancer" resource.labels.forwarding_rule_name="(FORWARDING_RULE_NAME)" resource.labels.url_map_name="(URL_MAP_NAME)" httpRequest.status=0 jsonPayload.statusDetails="client_disconnected_before_any_response"