fix(pluginserver): ensure a change to plugin config takes effect (#12718

) (cherry picked from commit 97c2651)
Kong · Mar 19, 2024 · b829184 · b829184
1 parent f6868a8
commit b829184
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diff --git a/changelog/unreleased/kong/fix-external-plugin-instance.yml b/changelog/unreleased/kong/fix-external-plugin-instance.yml
@@ -0,0 +1,5 @@
+message: |
+    Fix an issue where an external plugin (Go, Javascript, or Python) would fail to
+    apply a change to the plugin config via the Admin API.
+type: bugfix
+scope: Configuration
diff --git a/kong/runloop/plugin_servers/init.lua b/kong/runloop/plugin_servers/init.lua
@@ -213,6 +213,7 @@ function get_instance_id(plugin_name, conf)
 
   if instance_info
     and instance_info.id
+    and instance_info.seq == conf.__seq__
     and instance_info.conf and instance_info.conf.__plugin_id == key
   then
     -- exact match, return it
@@ -224,6 +225,7 @@ function get_instance_id(plugin_name, conf)
     -- we're the first, put something to claim
     instance_info          = {
       conf = conf,
+      seq = conf.__seq__,
     }
     running_instances[key] = instance_info
   else
@@ -246,6 +248,7 @@ function get_instance_id(plugin_name, conf)
   instance_info.id = new_instance_info.id
   instance_info.plugin_name = plugin_name
   instance_info.conf = new_instance_info.conf
+  instance_info.seq = new_instance_info.seq
   instance_info.Config = new_instance_info.Config
   instance_info.rpc = new_instance_info.rpc