Kong not responding

I’m running Kong in Docker. After running for about an hour, it stops processing all requests. Below is my stack configuration and the 3 lines I get after turning on the debug logs.

kong:
  image: kong:2.3.0
  ports:
    - 7000:8000
    - 8010:8010
    - 8443:8443
  environment:
    KONG_DATABASE: postgres
    KONG_PG_HOST: kong-database
    KONG_PG_USER: kong
    KONG_PG_PASSWORD: kong
    KONG_ADMIN_LISTEN: 0.0.0.0:8010
    KONG_ADMIN_LISTEN_SSL: 0.0.0.0:8545
    KONG_LOG_LEVEL: debug
  networks:
    - back-end

2021/02/03 01:53:58 [debug] 25#0: *93 [lua] base.lua:448: [upstream:example.com 1] executing requery for: example.com,
2021/02/03 01:53:58 [debug] 25#0: *93 [lua] base.lua:640: queryDns(): [upstream:example.com 1] querying dns for example.com,
2021/02/03 01:53:57 [debug] 24#0: *92 [lua] base.lua:493: f(): [upstream:example.com 1] no dns changes detected for example.com,