fix(monitoring): incorrect states used to determine rescheduling

Author: mbroadst

lib/core/sdam/monitoring.js

@@ -4,8 +4,8 @@ const ServerDescription = require('./server_description').ServerDescription;
 const calculateDurationInMs = require('../utils').calculateDurationInMs;
 
 // pulled from `Server` implementation
-const STATE_DISCONNECTED = 'disconnected';
-const STATE_DISCONNECTING = 'disconnecting';
+const STATE_CLOSED = 'closed';
+const STATE_CLOSING = 'closing';
 
 /**
  * Published when server description changes, but does NOT include changes to the RTT.
@@ -180,7 +180,7 @@ function monitorServer(server, options) {
 
     // emit an event indicating that our description has changed
     server.emit('descriptionReceived', new ServerDescription(server.description.address, isMaster));
-    if (server.s.state === STATE_DISCONNECTED || server.s.state === STATE_DISCONNECTING) {
+    if (server.s.state === STATE_CLOSED || server.s.state === STATE_CLOSING) {
       return;
     }