failed to fetch data from etcd

2020/10/09 09:00:27 [error] 15#15: *8 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/upstreams, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *11 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/consumers, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *18 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/proto, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *10 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/proto, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *9 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/services, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *17 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/services, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *16 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/global_rules, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *5 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/routes, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *15 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/ssl, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *7 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/global_rules, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *14 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/routes, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *6 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/ssl, context: ngx.timer
2020/10/09 09:00:27 [error] 15#15: *20 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/consumers, context: ngx.timer
2020/10/09 09:00:27 [error] 16#16: *3 [lua] config_etcd.lua:351: failed to fetch data from etcd: failed to read etcd dir, etcd key: /apisix/upstreams, context: ngx.timer
2020/10/09 09:00:32 [error] 15#15: *19 [lua] heartbeat.lua:117: failed to report heartbeat information: timeout, context: ngx.timer

I try to deploy apisix using this chart, I have set “etcd.host" in values.yaml.
But I got the error log. Where is the problem？