kuberxy opened a new issue #3537:
URL: https://github.com/apache/apisix/issues/3537
### Issue description
2021/02/05 14:24:48 [error] 17384#17384: *114551120 failed to run
balancer_by_lua*: /usr/local/share/lua/5.1/resty/healthcheck.lua:247: attempt
to index field 'targets' (a nil value)
stack traceback:
/usr/local/share/lua/5.1/resty/healthcheck.lua:247: in function
'get_target'
/usr/local/share/lua/5.1/resty/healthcheck.lua:424: in function
'get_target_status'
/usr/local/share/lua/5.1/apisix/balancer.lua:68: in function
'fetch_health_nodes'
/usr/local/share/lua/5.1/apisix/balancer.lua:149: in function
'create_obj_fun'
/usr/local/share/lua/5.1/apisix/core/lrucache.lua:92: in function
'lrucache_server_picker'
/usr/local/share/lua/5.1/apisix/balancer.lua:246: in function
'pick_server'
/usr/local/share/lua/5.1/apisix/balancer.lua:276: in function
'load_balancer'
/usr/local/share/lua/5.1/apisix/init.lua:748: in function
'http_balancer_phase'
balancer_by_lua:2: in main chunk while connecting to upstream, client:
183.95.49.7, server: , request:
### Environment
* apisix version (cmd: `apisix version`): 2.1
* OS (cmd: `uname -a`): 4.15.0-111-generic Ubuntu 18.04
* OpenResty / Nginx version (cmd: `nginx -V` or `openresty
-V`):openresty/1.15.8.3
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