JanLi-air opened a new issue #2709:
URL: https://github.com/apache/apisix/issues/2709
### Issue description
When configured limit-count plugin in global rule, it sometimes throws error
and respond with 500.
### Environment
* apisix version (cmd: `apisix version`): 2.0
* OS: Linux
### Minimal test code / Steps to reproduce the issue
1. Configure limit-count in global rule like this:
```
"limit-count": {
"count": 1000000000,
"policy": "local",
"key": "remote_addr",
"rejected_code": 429,
"time_window": 1
}
```
2. Repeatly request apisix
3. The error happens after some requests, might need thousands of requests
to reproduce the issue.
### What's the actual result? (including assertion message & call stack if
applicable)
The request got 500 response code due to runtime error in limit-count.lua:
```
2020/11/11 09:48:15 [error] 99#99: *239834 lua entry thread aborted: runtime
error: ...esty/luajit/share/lua/5.1/apisix/plugins/limit-count.lua:167: attempt
to call method 'incoming' (a nil value)
stack traceback:
coroutine 0:
...esty/luajit/share/lua/5.1/apisix/plugins/limit-count.lua: in function
'phase_func'
/usr/local/openresty/luajit/share/lua/5.1/apisix/init.lua:141: in function
'run_plugin'
/usr/local/openresty/luajit/share/lua/5.1/apisix/init.lua:350: in function
'http_access_phase'
access_by_lua(nginx.conf:225):2: in main chunk, client: 172.16.128.215,
server: , request: "GET /apisix/prometheus/metrics HTTP/1.1", host:
"10.212.4.241:8080"
```
### What's the expected result?
The response code should be 200 for normal requests, it should only be 429
when the limit count is reached.
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