[GitHub] [apisix] Ben0625 commented on issue #4090: Request help: Correspondence between matched rules and upstreams within one route

[GitBox <gi...@apache.org>]

Ben0625 commented on issue #4090:
URL: https://github.com/apache/apisix/issues/4090#issuecomment-844663342


   I find a new bug here:
   When I set 2 nodes in "upstream.nodes" attribute for 2 rules, something unexpected happens.
   
   ```
   curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
   {
       "uri": "/hello",
       "plugins": {
           "traffic-split": {
               "rules": [
                   {
                       "match": [
                           {
                               "vars": [
                                   ["http_id","==","1"]
                               ]
                           }
                       ],
                       "weighted_upstreams": [
                           {
                               "upstream": {
                                   "name": "upstream_A",
                                   "type": "roundrobin",
                                   "nodes": {
                                       "127.0.0.1:1980":1,
                                       "127.0.0.1:1981":1
                                   }
                               },
                               "weight": 3
                           }
                       ]
                   },
                   {
                       "match": [
                           {
                               "vars": [
                                   ["http_id","==","2"]
                               ]
                           }
                       ],
                       "weighted_upstreams": [
                           {
                               "upstream": {
                                   "name": "upstream_B",
                                   "type": "roundrobin",
                                   "nodes": {
                                       "127.0.0.1:1982":1,
                                       "127.0.0.1:1983":1
                                   }
                               },
                               "weight": 3
                           }
                       ]
                   }
               ]
           }
       },
       "upstream": {
               "type": "roundrobin",
               "nodes": {
                   "127.0.0.1:1980": 1
               }
       }
   }'
   ```
   
   Reproduce steps:
   1. Request with id=1 for several times
   2. Request with id=2 for several times
   
   Then you will see nodes of upstream_A be picked when requesting with id = 2 for some time. It looks messed up.


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