membphis commented on pull request #2415:
URL: https://github.com/apache/apisix/pull/2415#issuecomment-711896804


   @Jaycean 
   
   
https://github.com/apache/apisix/blob/d63f3e068c0d54ab7b2b3acec8e5f4914da0a4b7/apisix/plugins/limit-conn.lua#L71
   
   we can print the `ctx.var[conf.key]` to error log before this line, and 
confirm it in the test case.
   
   test case example: 
https://github.com/apache/apisix/blob/d63f3e068c0d54ab7b2b3acec8e5f4914da0a4b7/t/plugin/limit-conn.t#L705-L706
   


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