From 32316e4c55044d175c230600d9c2669f90bb21c6 Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@mongodb.com>
Date: Sun, 3 Nov 2019 08:56:42 -0500
Subject: [PATCH] fix(pool): don't reset a pool if we'not already connected

---
 lib/core/connection/pool.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/core/connection/pool.js b/lib/core/connection/pool.js
index 318f5fbe42..e5bfdaae07 100644
--- a/lib/core/connection/pool.js
+++ b/lib/core/connection/pool.js
@@ -720,6 +720,14 @@ Pool.prototype.destroy = function(force, callback) {
  * @param {function} [callback]
  */
 Pool.prototype.reset = function(callback) {
+  if (this.s.state !== CONNECTED) {
+    if (typeof callback === 'function') {
+      callback(new MongoError('pool is not connected, reset aborted'));
+    }
+
+    return;
+  }
+
   const connections = this.availableConnections.concat(this.inUseConnections);
   eachAsync(
     connections,
@@ -739,6 +747,9 @@ Pool.prototype.reset = function(callback) {
       }
 
       resetPoolState(this);
+
+      // attempt reexecution
+      process.nextTick(() => _execute(this)());
       if (typeof callback === 'function') {
         callback(null, null);
       }