Kong go plugin - kong.Response.Exit throws error

Hello you all.

I'm developing some plugins for Kong using go plugin structure. But when I try to output a simple response in Access phase im getting the following error in the log file: /usr/local/kong/logs/error.log:

2020/07/14 10:25:00 [error] 53#0: *71 recv() failed (104: Connection reset by peer), client: 172.20.0.1, server: kong, request: "GET /produtos/5PKfpT9BmAlOt7Y4Pp3a HTTP/1.1", host: "localhost"
2020/07/14 10:25:00 [debug] 53#0: *71 [lua] init.lua:888: balancer(): setting address (try 1): 192.168.65.2:5001
2020/07/14 10:25:00 [debug] 53#0: *71 [lua] init.lua:917: balancer(): enabled connection keepalive (pool=192.168.65.2|5001, pool_size=60, idle_timeout=60, max_requests=100)
2020/07/14 10:25:00 [notice] 53#0: signal 17 (SIGCHLD) received from 62
2020/07/14 10:25:00 [notice] 53#0: *4 [kong] go.lua:97 go-pluginserver terminated: exit 2, context: ngx.timer
2020/07/14 10:25:00 [notice] 53#0: *4 [kong] go.lua:86 Starting go-pluginserver, context: ngx.timer

Steps To Reproduce

Create a plugin using Access phase and run the following code:

headers := make(map[string][]string)
headers["Content-Type"] = []string{"application/json; charset=utf-8"}
kong.Response.Exit(200, `{"success":true}`, headers)

In Postman, when hit this route i get the response:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title>Error</title>
</head>

<body>
    <pre>Cannot GET /produtos/5PKfpT9BmAlOt7Y4Pp3a</pre>
</body>

</html>

Additional Details & Logs

Kong version (2.1.0beta.1)

Kong debug-level startup logs ($ kong start --vv)

kong-api      | 2020/07/14 10:24:40 [verbose] Kong: 2.1.0beta.1
kong-api      | 2020/07/14 10:24:40 [debug] ngx_lua: 10015
kong-api      | 2020/07/14 10:24:40 [debug] nginx: 1015008
kong-api      | 2020/07/14 10:24:40 [debug] Lua: LuaJIT 2.1.0-beta3
kong-api      | 2020/07/14 10:24:40 [verbose] reading config file at /etc/kong/kong.conf
kong-api      | 2020/07/14 10:24:40 [debug] reading environment variables
kong-api      | 2020/07/14 10:24:40 [debug] KONG_NGINX_DAEMON ENV found with "off"
kong-api      | 2020/07/14 10:24:40 [debug] admin_access_log = "logs/admin_access.log"
kong-api      | 2020/07/14 10:24:40 [debug] admin_error_log = "logs/error.log"
kong-api      | 2020/07/14 10:24:40 [debug] admin_listen = {"0.0.0.0:8001 reuseport backlog=16384"}
kong-api      | 2020/07/14 10:24:40 [debug] anonymous_reports = true
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_contact_points = {"127.0.0.1"}
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_data_centers = {"dc1:2","dc2:3"}
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_keyspace = "kong"
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_lb_policy = "RequestRoundRobin"
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_port = 9042
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_read_consistency = "ONE"
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_refresh_frequency = 60
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_repl_factor = 1
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_repl_strategy = "SimpleStrategy"
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_schema_consensus_timeout = 10000
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_ssl = false
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_ssl_verify = false
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_timeout = 5000
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_username = "kong"
kong-api      | 2020/07/14 10:24:40 [debug] cassandra_write_consistency = "ONE"
kong-api      | 2020/07/14 10:24:40 [debug] client_body_buffer_size = "8k"
kong-api      | 2020/07/14 10:24:40 [debug] client_max_body_size = "0"
kong-api      | 2020/07/14 10:24:40 [debug] client_ssl = false
kong-api      | 2020/07/14 10:24:40 [debug] cluster_control_plane = "127.0.0.1:8005"
kong-api      | 2020/07/14 10:24:40 [debug] cluster_listen = {"0.0.0.0:8005"}
kong-api      | 2020/07/14 10:24:40 [debug] cluster_mtls = "shared"
kong-api      | 2020/07/14 10:24:40 [debug] database = "off"
kong-api      | 2020/07/14 10:24:40 [debug] db_cache_ttl = 0
kong-api      | 2020/07/14 10:24:40 [debug] db_cache_warmup_entities = {"services","plugins"}
kong-api      | 2020/07/14 10:24:40 [debug] db_resurrect_ttl = 30
kong-api      | 2020/07/14 10:24:40 [debug] db_update_frequency = 5
kong-api      | 2020/07/14 10:24:40 [debug] db_update_propagation = 0
kong-api      | 2020/07/14 10:24:40 [debug] declarative_config = "/usr/local/kong/declarative/kong.yml"
kong-api      | 2020/07/14 10:24:40 [debug] dns_error_ttl = 1
kong-api      | 2020/07/14 10:24:40 [debug] dns_hostsfile = "/etc/hosts"
kong-api      | 2020/07/14 10:24:40 [debug] dns_no_sync = false
kong-api      | 2020/07/14 10:24:40 [debug] dns_not_found_ttl = 30
kong-api      | 2020/07/14 10:24:40 [debug] dns_order = {"LAST","SRV","A","CNAME"}
kong-api      | 2020/07/14 10:24:40 [debug] dns_resolver = {}
kong-api      | 2020/07/14 10:24:40 [debug] dns_stale_ttl = 4
kong-api      | 2020/07/14 10:24:40 [debug] error_default_type = "text/plain"
kong-api      | 2020/07/14 10:24:40 [debug] go_plugins_dir = "/home/kong/go-plugins/"
kong-api      | 2020/07/14 10:24:40 [debug] go_pluginserver_exe = "/usr/local/bin/go-pluginserver"
kong-api      | 2020/07/14 10:24:40 [debug] headers = {"server_tokens","latency_tokens"}
kong-api      | 2020/07/14 10:24:40 [debug] host_ports = {}
kong-api      | 2020/07/14 10:24:40 [debug] kic = false
kong-api      | 2020/07/14 10:24:40 [debug] log_level = "debug"
kong-api      | 2020/07/14 10:24:40 [debug] lua_package_cpath = ""
kong-api      | 2020/07/14 10:24:40 [debug] lua_package_path = "./?.lua;./?/init.lua;"
kong-api      | 2020/07/14 10:24:40 [debug] lua_socket_pool_size = 30
kong-api      | 2020/07/14 10:24:40 [debug] lua_ssl_verify_depth = 1
kong-api      | 2020/07/14 10:24:40 [debug] mem_cache_size = "128m"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_admin_directives = {}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_daemon = "off"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_events_directives = {{name="worker_connections",value="auto"},{name="multi_accept",value="on"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_events_multi_accept = "on"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_events_worker_connections = "auto"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_client_body_buffer_size = "8k"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_client_max_body_size = "0"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_directives = {{name="client_max_body_size",value="0"},{name="ssl_prefer_server_ciphers",value="off"},{name="client_body_buffer_size",value="8k"},{name="ssl_protocols",value="TLSv1.2 TLSv1.3"},{name="ssl_session_tickets",value="on"},{name="ssl_session_timeout",value="1d"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_ssl_prefer_server_ciphers = "off"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_ssl_protocols = "TLSv1.2 TLSv1.3"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_ssl_session_tickets = "on"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_ssl_session_timeout = "1d"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_status_directives = {}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_upstream_directives = {{name="keepalive_requests",value="100"},{name="keepalive_timeout",value="60s"},{name="keepalive",value="60"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_upstream_keepalive = "60"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_upstream_keepalive_requests = "100"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_http_upstream_keepalive_timeout = "60s"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_main_daemon = "off"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_main_directives = {{name="daemon",value="off"},{name="worker_processes",value="auto"},{name="worker_rlimit_nofile",value="auto"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_main_worker_processes = "auto"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_main_worker_rlimit_nofile = "auto"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_optimizations = true
kong-api      | 2020/07/14 10:24:40 [debug] nginx_proxy_directives = {{name="real_ip_header",value="X-Real-IP"},{name="real_ip_recursive",value="off"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_proxy_real_ip_header = "X-Real-IP"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_proxy_real_ip_recursive = "off"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_sproxy_directives = {}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_status_directives = {}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_stream_directives = {{name="ssl_session_timeout",value="1d"},{name="ssl_session_tickets",value="on"},{name="ssl_prefer_server_ciphers",value="off"},{name="ssl_protocols",value="TLSv1.2 TLSv1.3"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_stream_ssl_prefer_server_ciphers = "off"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_stream_ssl_protocols = "TLSv1.2 TLSv1.3"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_stream_ssl_session_tickets = "on"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_stream_ssl_session_timeout = "1d"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_supstream_directives = {}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_upstream_directives = {{name="keepalive_requests",value="100"},{name="keepalive_timeout",value="60s"},{name="keepalive",value="60"}}
kong-api      | 2020/07/14 10:24:40 [debug] nginx_upstream_keepalive = "60"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_upstream_keepalive_requests = "100"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_upstream_keepalive_timeout = "60s"
kong-api      | 2020/07/14 10:24:40 [debug] nginx_worker_processes = "auto"
kong-api      | 2020/07/14 10:24:40 [debug] pg_database = "kong"
kong-api      | 2020/07/14 10:24:40 [debug] pg_host = "127.0.0.1"
kong-api      | 2020/07/14 10:24:40 [debug] pg_max_concurrent_queries = 0
kong-api      | 2020/07/14 10:24:40 [debug] pg_port = 5432
kong-api      | 2020/07/14 10:24:40 [debug] pg_ro_ssl = false
kong-api      | 2020/07/14 10:24:40 [debug] pg_ro_ssl_verify = false
kong-api      | 2020/07/14 10:24:40 [debug] pg_semaphore_timeout = 60000
kong-api      | 2020/07/14 10:24:40 [debug] pg_ssl = false
kong-api      | 2020/07/14 10:24:40 [debug] pg_ssl_verify = false
kong-api      | 2020/07/14 10:24:40 [debug] pg_timeout = 5000
kong-api      | 2020/07/14 10:24:40 [debug] pg_user = "kong"
kong-api      | 2020/07/14 10:24:40 [debug] plugins = {"bundled","kong-router","kong-cache","kong-config"}
kong-api      | 2020/07/14 10:24:40 [debug] port_maps = {}
kong-api      | 2020/07/14 10:24:40 [debug] prefix = "/usr/local/kong/"
kong-api      | 2020/07/14 10:24:40 [debug] proxy_access_log = "logs/access.log"
kong-api      | 2020/07/14 10:24:40 [debug] proxy_error_log = "logs/error.log"
kong-api      | 2020/07/14 10:24:40 [debug] proxy_listen = {"0.0.0.0:8000 reuseport backlog=16384"}
kong-api      | 2020/07/14 10:24:40 [debug] real_ip_header = "X-Real-IP"
kong-api      | 2020/07/14 10:24:40 [debug] real_ip_recursive = "off"
kong-api      | 2020/07/14 10:24:40 [debug] role = "traditional"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_cipher_suite = "intermediate"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_ciphers = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_prefer_server_ciphers = "on"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_protocols = "TLSv1.1 TLSv1.2 TLSv1.3"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_session_tickets = "on"
kong-api      | 2020/07/14 10:24:40 [debug] ssl_session_timeout = "1d"
kong-api      | 2020/07/14 10:24:40 [debug] status_access_log = "off"
kong-api      | 2020/07/14 10:24:40 [debug] status_error_log = "logs/status_error.log"
kong-api      | 2020/07/14 10:24:40 [debug] status_listen = {"off"}
kong-api      | 2020/07/14 10:24:40 [debug] stream_listen = {"off"}
kong-api      | 2020/07/14 10:24:40 [debug] trusted_ips = {}
kong-api      | 2020/07/14 10:24:40 [debug] upstream_keepalive = 60
kong-api      | 2020/07/14 10:24:40 [debug] upstream_keepalive_idle_timeout = 60
kong-api      | 2020/07/14 10:24:40 [debug] upstream_keepalive_max_requests = 100
kong-api      | 2020/07/14 10:24:40 [debug] upstream_keepalive_pool_size = 60
kong-api      | 2020/07/14 10:24:40 [debug] worker_consistency = "strict"
kong-api      | 2020/07/14 10:24:40 [debug] worker_state_update_frequency = 5
kong-api      | 2020/07/14 10:24:40 [verbose] prefix in use: /usr/local/kong
kong-api      | 2020/07/14 10:24:40 [debug] loading subsystems migrations...
kong-api      | 2020/07/14 10:24:40 [verbose] retrieving cache schema state...
kong-api      | 2020/07/14 10:24:40 [verbose] schema state retrieved
kong-api      | 2020/07/14 10:24:40 [verbose] preparing nginx prefix directory at /usr/local/kong
kong-api      | 2020/07/14 10:24:40 [debug] searching for OpenResty 'nginx' executable
kong-api      | 2020/07/14 10:24:40 [debug] /usr/local/openresty/nginx/sbin/nginx -v: 'nginx version: openresty/1.15.8.3'
kong-api      | 2020/07/14 10:24:40 [debug] found OpenResty 'nginx' executable at /usr/local/openresty/nginx/sbin/nginxnginx: [warn] load balancing method redefined in /usr/local/kong/nginx-kong.conf:60

Operating system - macOS Catalina running docker with kong:2.1-alpine

Kong / kong

Kong go plugin - kong.Response.Exit throws error #6108

Steps To Reproduce

Additional Details & Logs