From a0cd877669939c88bd8bff3b80c43fe297bad7c4 Mon Sep 17 00:00:00 2001
From: Ilya Averyanov <av@rubybox.ru>
Date: Wed, 2 Mar 2022 16:26:39 +0300
Subject: [PATCH] chore(mongodb): do not use mongodb internal pool

---
 apps/emqx_connector/src/emqx_connector_mongo.erl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/emqx_connector/src/emqx_connector_mongo.erl b/apps/emqx_connector/src/emqx_connector_mongo.erl
index 135ba3382..bf710383b 100644
--- a/apps/emqx_connector/src/emqx_connector_mongo.erl
+++ b/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,