Fix attempt to index field host.lastQuery a nil value

[seifchen]

When I use docker run kong, I got err:

2019/11/20 15:49:33 [error] 61#0: *23 lua entry thread aborted: runtime error: /usr/local/share/lua/5.1/resty/dns/balancer/base.lua:1206: attempt to index field 'lastQuery' (a nil value)
stack traceback:
coroutine 0:
        /usr/local/share/lua/5.1/resty/dns/balancer/base.lua: in function 'cb_expire'
        /usr/local/share/lua/5.1/resty/timer.lua:87: in function </usr/local/share/lua/5.1/resty/timer.lua:51>, context: ngx.timer
2019/11/20 15:49:34 [error] 61#0: *30 lua entry thread aborted: runtime error: /usr/local/share/lua/5.1/resty/dns/balancer/base.lua:1206: attempt to index field 'lastQuery' (a nil value)
stack traceback:
coroutine 0:
        /usr/local/share/lua/5.1/resty/dns/balancer/base.lua: in function 'cb_expire'
        /usr/local/share/lua/5.1/resty/timer.lua:87: in function </usr/local/share/lua/5.1/resty/timer.lua:51>, context: ngx.timer
2019/11/20 15:49:36 [error] 60#0: *50 lua entry thread aborted: runtime error: /usr/local/share/lua/5.1/resty/dns/balancer/base.lua:1206: attempt to index field 'lastQuery' (a nil value)
stack traceback:
coroutine 0:
        /usr/local/share/lua/5.1/resty/dns/balancer/base.lua: in function 'cb_expire'
        /usr/local/share/lua/5.1/resty/timer.lua:87: in function </usr/local/share/lua/5.1/resty/timer.lua:51>, context: ngx.timer
2019/11/20 15:49:37 [error] 60#0: *58 lua entry thread aborted: runtime error: /usr/local/share/lua/5.1/resty/dns/balancer/base.lua:1206: attempt to index field 'lastQuery' (a nil value)
stack traceback:
coroutine 0:
        /usr/local/share/lua/5.1/resty/dns/balancer/base.lua: in function 'cb_expire'
        /usr/local/share/lua/5.1/resty/timer.lua:87: in function </usr/local/share/lua/5.1/resty/timer.lua:51>, context: ngx.timer
2019/11/20 15:49:38 [notice] 60#0: *11 [lua] cache_warmup.lua:34: finished warming up DNS entries' into the cache (in 5556ms), context: ngx.timer

environment

os: macOs Catalina:10.15.1
docker image: kong:1.4.0-centos

How to Recurring problem

There is my start.sh

docker run -d  --name kong \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     -e "KONG_PG_USER=kong" \
     -e "KONG_PG_PORT=5432" \
     -e "KONG_PG_DATABASE=kong" \
     -e "KONG_PG_PASSWORD=password" \
     -e "KONG_CASSANDRA_CONTACT_POINTS=kong-database" \
     -e "KONG_ADMIN_LISTEN=0.0.0.0:8001, 0.0.0.0:8444 ssl" \
     -e "KONG_NGINX_WORKER_PROCESSES=2" \
     -e "KONG_LOG_LEVEL=debug"\
     -e "GUAZI_ENV=dev" \
     -e  "KONG_NGINX_PROXY_PROXY_BIND=0.0.0.0" \
     -p 8000:8000 \
     -p 8001:8001 \
     kong:1.4.0-centos

first

sh start.sh

second

docker rm -f kong

third

wait some minutes

last

sh start.sh
then check the error.log you'll find the error.