envoy cannot handle max_stream_per_connection. #3203
Description
acutally, I want to send 1 streams per 1 connection. (http2).
so I configured as.
.
.
.
clusters:
- name: asr_mobile_en-US_Service
max_requests_per_connection: 1
connect_timeout: 2s
cleanup_interval: 2s
type: STATIC
lb_policy: ROUND_ROBIN
http2_protocol_options:
hpack_table_size: 4096
max_concurrent_streams: 1
circuit_breakers:
thresholds:
- max_connections: 4096
max_pending_requests: 6000
max_requests: 6000
hosts: [
{ socket_address: { address: 172.17.0.1, port_value: 10001 }},
{ socket_address: { address: 172.17.0.1, port_value: 10002 }},
{ socket_address: { address: 172.17.0.1, port_value: 10003 }},
{ socket_address: { address: 172.17.0.1, port_value: 10004 }},
{ socket_address: { address: 172.17.0.1, port_value: 10005 }},
{ socket_address: { address: 172.17.0.1, port_value: 10006 }},
]
as you can see,
I set max_requests__per_connection=1 and max_concurrent_streams=1
there are only 6 machines and I requested to envoy with 7 requests.
and expect 6 requests sends to machine each, and reject 1 request.
and run as
envoy -c /etc/envoy.yaml --concurrency 1
but log is
{ "ts": "2018-04-25T09:10:19.727Z", "upstreamHost": "172.17.0.1:10002" } }
{ "ts": "2018-04-25T09:10:19.725Z", "upstreamHost": "172.17.0.1:10002" } }
{ "ts": "2018-04-25T09:10:19.726Z", ", "upstreamHost": "172.17.0.1:10001" } }
{ "ts": "2018-04-25T09:10:19.726Z", "upstreamHost": "172.17.0.1:10006" } }
{ "ts": "2018-04-25T09:10:19.726Z", "upstreamHost": "172.17.0.1:10005" } }
{ "ts": "2018-04-25T09:10:19.726Z", "upstreamHost": "172.17.0.1:10004" } }
{ "ts": "2018-04-25T09:10:19.725Z", "upstreamHost": "172.17.0.1:10003" } }
as you can see, envoy sent to 172.17.0.1:10002 twice before finishing first request.
as again, I set max_requests__per_connection=1 and max_concurrent_streams=1
what am I missing?