spacewander commented on a change in pull request #5463:
URL: https://github.com/apache/apisix/pull/5463#discussion_r746292328



##########
File path: apisix/plugins/datadog.lua
##########
@@ -144,17 +141,22 @@ function _M.log(conf, ctx)
     local entry = fetch_log(ngx, {})
     entry.upstream_latency = ctx.var.upstream_response_time * 1000
     entry.balancer_ip = ctx.balancer_ip or ""
-    entry.route_name = ctx.route_name or ""
     entry.scheme = ctx.upstream_scheme or ""
     entry.prefer_name = conf.prefer_name
 
-    -- capture service name at request response cycle if prefer_name is set.
-    if entry.prefer_name and entry.service_id and entry.service_id ~= "" then
-       local svc = service_fetch(entry.service_id)
+    -- if prefer_name is set, fetch the service/route name. If the name is 
nil, fall back to id.
+    if entry.prefer_name then

Review comment:
       We can use `conf.prefer_name` directly?




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