[GitHub] [apisix] griffenliu edited a comment on issue #2006: bug(cors): attempt to concatenate field 'conf_id' (a nil value)

[GitBox]

griffenliu edited a comment on issue #2006:
URL: https://github.com/apache/apisix/issues/2006#issuecomment-694208133


   I want to use the prometheus plug-ins.
   But when I access http://localhost:9080/apisix/prometheus/metrics by 
document 
https://github.com/apache/apisix/blob/master/doc/zh-cn/plugins/prometheus.md.
   
   I got the following error too:
   ```
   2020/09/17 20:45:31 [error] 3087#3087: *11669858 failed to run 
header_filter_by_lua*: 
...user-center//deps/share/lua/5.1/apisix/core/lrucache.lua:202: attempt to 
concatenate
    field 'conf_id' (a nil value)                                               
                                                                                
                
   stack traceback:                                                             
                                                                                
                
           ...user-center//deps/share/lua/5.1/apisix/core/lrucache.lua:202: in 
function 'plugin_ctx'                                                           
                 
           ...-user-center//deps/share/lua/5.1/apisix/plugins/cors.lua:144: in 
function 'phase_fun'                                                            
                 
           ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:142: in 
function 'run_plugin'
           ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:550: in 
function 'common_phase'
           ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:561: in 
function 'http_header_filter_phase'
           header_filter_by_lua:2: in main chunk, client: 172.30.213.200, 
server: , request: "GET /apisix/prometheus/metrics HTTP/1.1", host: 
"172.30.212.70:9080"
   ```
   
   


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