From cf598e1756c33bb055f2815ea4ebe68cf5d59a4a Mon Sep 17 00:00:00 2001
From: Matt Broadstone <mbroadst@mongodb.com>
Date: Thu, 22 Aug 2019 07:42:37 -0400
Subject: [PATCH] fix: correct inverted defaults for unified topology

The defaults for `serverSelectionTimeoutMS` and
`heartbeatFrequencyMS` were unintentionally inverted.
---
 lib/core/sdam/topology.js                     | 4 ++--
 test/functional/connections_stepdown_tests.js | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/core/sdam/topology.js b/lib/core/sdam/topology.js
index c16351944b6..b58856ec0f2 100644
--- a/lib/core/sdam/topology.js
+++ b/lib/core/sdam/topology.js
@@ -32,8 +32,8 @@ let globalTopologyCounter = 0;
 // Constants
 const TOPOLOGY_DEFAULTS = {
   localThresholdMS: 15,
-  serverSelectionTimeoutMS: 10000,
-  heartbeatFrequencyMS: 30000,
+  serverSelectionTimeoutMS: 30000,
+  heartbeatFrequencyMS: 10000,
   minHeartbeatFrequencyMS: 500
 };
 
diff --git a/test/functional/connections_stepdown_tests.js b/test/functional/connections_stepdown_tests.js
index 9c012f761c0..fb3e2cd81c5 100644
--- a/test/functional/connections_stepdown_tests.js
+++ b/test/functional/connections_stepdown_tests.js
@@ -30,7 +30,7 @@ describe('Connections survive primary step down', function() {
   beforeEach(function() {
     client = this.configuration.newClient(
       { w: 1 },
-      { poolSize: 1, retryWrites: false, useUnifiedTopology: true, serverSelectionTimeoutMS: 30000 }
+      { poolSize: 1, retryWrites: false, useUnifiedTopology: true }
     );
 
     return client