Re: [I] bug: ai-proxy-multi plugin fails with plugin_config_id when multiple instances are configured [apisix]

["Baoyuantop (via GitHub)" <gi...@apache.org>]

Baoyuantop commented on issue #13456:
URL: https://github.com/apache/apisix/issues/13456#issuecomment-4599709989

   Thanks for the detailed report. This looks like a real bug in `ai-proxy-multi` when it is used through `plugin_config_id`.
   
   The reported behavior matches the current code path:
   
   1. When `ai-proxy-multi` has only one instance, it directly selects that instance and does not fetch the parent config, so the single-instance case works.
   2. When it has multiple instances, it enters the balancer path and calls `resource.fetch_latest_conf(conf._meta.parent.resource_key)`.
   3. For a plugin configured via `plugin_config_id`, the parent resource key is `/plugin_configs/<id>`.
   4. `resource.fetch_latest_conf` currently supports `upstreams`, `routes`, `services`, and `stream_routes`, but not `plugin_configs`. So it logs `unsupported resource type: plugin_configs`, returns nil, and `ai-proxy-multi` returns `failed to fetch the parent config` with 503.
   
   As a temporary workaround, please configure `ai-proxy-multi` directly on the Route instead of referencing it through `plugin_config_id`.


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