From edb1335f9dd85577ea1307672484bc44368e3005 Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@mongodb.com>
Date: Tue, 5 Nov 2019 17:05:29 -0500
Subject: [PATCH] fix(topology): set max listeners to infinity for db event
 relay

We relay topology events on the `Db` class for legacy compat, so
we need to remove limitations on max listeners in case users are
operating across many instances.

NODE-2123
---
 lib/core/sdam/topology.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/core/sdam/topology.js b/lib/core/sdam/topology.js
index ee1211ba47..28cadef0a4 100644
--- a/lib/core/sdam/topology.js
+++ b/lib/core/sdam/topology.js
@@ -211,6 +211,9 @@ class Topology extends EventEmitter {
 
       this.on('topologyDescriptionChanged', this.s.detectTopologyDescriptionChange);
     }
+
+    // NOTE: remove this when NODE-1709 is resolved
+    this.setMaxListeners(Infinity);
   }
 
   /**