Healthchecker init error when restart Kong with much worker process

[wuguangkuo]

Summary

Healthchecker init error when restart Kong with much worker process

Steps To Reproduce

1.Configure an upstream object with some targets
2.Ensure the server create much nginx worker process：nginx_worker_processes=auto or a value between about 20~40
3.restart Kong
4.the error.log print some exception stack

Additional Details & Logs

• Kong version (0.14.0)
• Kong error logs (<KONG_PREFIX>/logs/error.log)

2019/03/28 19:23:57 [error] 112024#0: *95 [lua] events.lua:175: do_handlerlist(): worker-events: event callback failed; source=lua-resty-healthcheck [a2d0f38f-7be9-4b7d-bae6-9555d636be6d.api.com], event=healthy, pid=112004 error='/usr/local/share/lua/5.1/resty/healthcheck.lua:917: attempt to index field 'targets' (a nil value) stack traceback: /usr/local/share/lua/5.1/resty/healthcheck.lua:917: in function </usr/local/share/lua/5.1/resty/healthcheck.lua:915> [C]: in function 'xpcall' /usr/local/share/lua/5.1/resty/worker/events.lua:166: in function 'do_handlerlist' /usr/local/share/lua/5.1/resty/worker/events.lua:198: in function 'do_event_json' /usr/local/share/lua/5.1/resty/worker/events.lua:342: in function 'poll' /usr/local/share/lua/5.1/resty/worker/events.lua:362: in function </usr/local/share/lua/5.1/resty/worker/events.lua:356>', data={"port":8180,"ip":"172.16.100.32","hostname":"172.16.100.32"}, context: ngx.timer

• Operating system: CentOS Linux release 7.4.1708 (Core)