fix(NODE-5999): Change TopologyDescription.error type to MongoError (#4028)

Author: aditi-khare-mongoDB

src/sdam/server.ts

@@ -357,7 +357,7 @@ export class Server extends TypedEventEmitter<ServerEvents> {
       // clear for the specific service id.
       if (!this.loadBalanced) {
         error.addErrorLabel(MongoErrorLabel.ResetPool);
-        markServerUnknown(this, error as MongoServerError);
+        markServerUnknown(this, error);
       } else if (connection) {
         this.pool.clear({ serviceId: connection.serviceId });
       }
@@ -373,7 +373,7 @@ export class Server extends TypedEventEmitter<ServerEvents> {
             if (shouldClearPool) {
               error.addErrorLabel(MongoErrorLabel.ResetPool);
             }
-            markServerUnknown(this, error as MongoServerError);
+            markServerUnknown(this, error);
             process.nextTick(() => this.requestCheck());
           }
         }
@@ -476,7 +476,7 @@ function calculateRoundTripTime(oldRtt: number, duration: number): number {
   return alpha * duration + (1 - alpha) * oldRtt;
 }
 
-function markServerUnknown(server: Server, error?: MongoServerError) {
+function markServerUnknown(server: Server, error?: MongoError) {
   // Load balancer servers can never be marked unknown.
   if (server.loadBalanced) {
     return;

src/sdam/server_description.ts

@@ -1,5 +1,5 @@
 import { type Document, Long, type ObjectId } from '../bson';
-import { type MongoError, MongoRuntimeError, type MongoServerError } from '../error';
+import { type MongoError, MongoRuntimeError } from '../error';
 import { arrayStrictEqual, compareObjectId, errorStrictEqual, HostAddress, now } from '../utils';
 import type { ClusterTime } from './common';
 import { ServerType } from './common';
@@ -31,7 +31,7 @@ export type TagSet = { [key: string]: string };
 /** @internal */
 export interface ServerDescriptionOptions {
   /** An Error used for better reporting debugging */
-  error?: MongoServerError;
+  error?: MongoError;
 
   /** The round trip time to ping this server (in ms) */
   roundTripTime?: number;

src/sdam/topology_description.ts

@@ -1,6 +1,6 @@
 import type { ObjectId } from '../bson';
 import * as WIRE_CONSTANTS from '../cmap/wire_protocol/constants';
-import { MongoRuntimeError, type MongoServerError } from '../error';
+import { type MongoError, MongoRuntimeError } from '../error';
 import { compareObjectId, shuffle } from '../utils';
 import { ServerType, TopologyType } from './common';
 import { ServerDescription } from './server_description';
@@ -307,13 +307,13 @@ export class TopologyDescription {
     );
   }
 
-  get error(): MongoServerError | null {
+  get error(): MongoError | null {
     const descriptionsWithError = Array.from(this.servers.values()).filter(
       (sd: ServerDescription) => sd.error
     );
 
     if (descriptionsWithError.length > 0) {
-      return descriptionsWithError[0].error as MongoServerError;
+      return descriptionsWithError[0].error;
     }
 
     return null;