Merge pull request #7187 from savonarola/mongo-no-double-pooling

chore(mongodb): do not use mongodb internal pool

apps/emqx_connector/src/emqx_connector_mongo.erl

@@ -73,7 +73,7 @@ fields(sharded) ->
     , {w_mode, fun w_mode/1}
     ] ++ mongo_fields();
 fields(topology) ->
-    [ {pool_size, fun emqx_connector_schema_lib:pool_size/1}
+    [ {pool_size, fun internal_pool_size/1}
     , {max_overflow, fun emqx_connector_schema_lib:pool_size/1}
     , {overflow_ttl, fun duration/1}
     , {overflow_check_period, fun duration/1}
@@ -97,6 +97,11 @@ mongo_fields() ->
     ] ++
     emqx_connector_schema_lib:ssl_fields().
 
+internal_pool_size(type) -> integer();
+internal_pool_size(default) -> 1;
+internal_pool_size(validator) -> [?MIN(1)];
+internal_pool_size(_) -> undefined.
+
 %% ===================================================================
 
 on_start(InstId, Config = #{mongo_type := Type,