bug: failed to fetch data from etcd

[membphis]

there is no data under /services and /upstreams.

2019/05/31 04:03:54 [error] 5370#5370: *875 [lua] config_etcd.lua:194: failed to fetch data from etcd: /usr/share/lua/5.1/resty/etcd.lua:240: bad argument #1 to 'ipairs' (table expected, got nil), etcd key: /services, context: ngx.timer
2019/05/31 04:03:59 [error] 5370#5370: *879 [lua] config_etcd.lua:194: failed to fetch data from etcd: /usr/share/lua/5.1/resty/etcd.lua:240: bad argument #1 to 'ipairs' (table expected, got nil), etcd key: /upstreams, context: ngx.timer

[membphis]

fixed already