fix: Change socket timeout default to 0 (#2572)

We make an implicit assumption with our default socket timeout that
most operations will complete within the current default of 5min. This is
not the case for services like Atlas Data Lake, which may regularly take
far longer to complete operations. In general we can't make any
assumptions about how long an operation will take to complete, and so
the default socket timeout is now 0 (infinity) unless otherwise indicated.

NODE-2835

lib/cmap/connection.js

@@ -32,7 +32,7 @@ class Connection extends EventEmitter {
     this.id = options.id;
     this.address = streamIdentifier(stream);
     this.bson = options.bson;
-    this.socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 360000;
+    this.socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 0;
     this.host = options.host || 'localhost';
     this.port = options.port || 27017;
     this.monitorCommands =

lib/core/connection/connect.js

@@ -263,7 +263,7 @@ function makeConnection(family, options, cancellationToken, _callback) {
       : typeof options.connectTimeoutMS === 'number'
       ? options.connectTimeoutMS
       : 30000;
-  const socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 360000;
+  const socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 0;
   const rejectUnauthorized =
     typeof options.rejectUnauthorized === 'boolean' ? options.rejectUnauthorized : true;
 

lib/core/connection/connection.js

@@ -69,7 +69,7 @@ class Connection extends EventEmitter {
    * @param {boolean} [options.keepAlive=true] TCP Connection keep alive enabled
    * @param {number} [options.keepAliveInitialDelay=120000] Initial delay before TCP keep alive enabled
    * @param {number} [options.connectionTimeout=30000] TCP Connection timeout setting
-   * @param {number} [options.socketTimeout=360000] TCP Socket timeout setting
+   * @param {number} [options.socketTimeout=0] TCP Socket timeout setting
    * @param {boolean} [options.promoteLongs] Convert Long values from the db into Numbers if they fit into 53 bits
    * @param {boolean} [options.promoteValues] Promotes BSON values to native types where possible, set to false to only receive wrapper types.
    * @param {boolean} [options.promoteBuffers] Promotes Binary BSON values to native Node Buffers.
@@ -92,7 +92,7 @@ class Connection extends EventEmitter {
 
     this.port = options.port || 27017;
     this.host = options.host || 'localhost';
-    this.socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 360000;
+    this.socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 0;
 
     // These values are inspected directly in tests, but maybe not necessary to keep around
     this.keepAlive = typeof options.keepAlive === 'boolean' ? options.keepAlive : true;
@@ -316,8 +316,7 @@ class Connection extends EventEmitter {
     if (typeof options === 'function') (callback = options), (options = {});
 
     const conn = this;
-    const socketTimeout =
-      typeof options.socketTimeout === 'number' ? options.socketTimeout : 360000;
+    const socketTimeout = typeof options.socketTimeout === 'number' ? options.socketTimeout : 0;
     const bson = conn.options.bson;
     const query = new Query(bson, ns, command, {
       numberToSkip: 0,

lib/core/connection/pool.js

@@ -63,8 +63,8 @@ var _id = 0;
  * @param {number} [options.keepAliveInitialDelay=120000] Initial delay before TCP keep alive enabled
  * @param {boolean} [options.noDelay=true] TCP Connection no delay
  * @param {number} [options.connectionTimeout=30000] TCP Connection timeout setting
- * @param {number} [options.socketTimeout=360000] TCP Socket timeout setting
- * @param {number} [options.monitoringSocketTimeout=30000] TCP Socket timeout setting for replicaset monitoring socket
+ * @param {number} [options.socketTimeout=0] TCP Socket timeout setting
+ * @param {number} [options.monitoringSocketTimeout=0] TCP Socket timeout setting for replicaset monitoring socket
  * @param {boolean} [options.ssl=false] Use SSL for connection
  * @param {boolean|function} [options.checkServerIdentity=true] Ensure we check server identify during SSL, set to false to disable checking. Only works for Node 0.12.x or higher. You can pass in a boolean or your own checkServerIdentity override function.
  * @param {Buffer} [options.ca] SSL Certificate store binary buffer
@@ -111,7 +111,7 @@ var Pool = function(topology, options) {
       minSize: 0,
       // socket settings
       connectionTimeout: 30000,
-      socketTimeout: 360000,
+      socketTimeout: 0,
       keepAlive: true,
       keepAliveInitialDelay: 120000,
       noDelay: true,

lib/core/topologies/replset.js

@@ -919,7 +919,7 @@ ReplSet.prototype.connect = function(options) {
     );
   });
 
-  // Error out as high availbility interval must be < than socketTimeout
+  // Error out as high availability interval must be < than socketTimeout
   if (
     this.s.options.socketTimeout > 0 &&
     this.s.options.socketTimeout <= this.s.options.haInterval

lib/core/topologies/server.js

@@ -75,7 +75,7 @@ function topologyId(server) {
  * @param {number} [options.keepAliveInitialDelay=120000] Initial delay before TCP keep alive enabled
  * @param {boolean} [options.noDelay=true] TCP Connection no delay
  * @param {number} [options.connectionTimeout=30000] TCP Connection timeout setting
- * @param {number} [options.socketTimeout=360000] TCP Socket timeout setting
+ * @param {number} [options.socketTimeout=0] TCP Socket timeout setting
  * @param {boolean} [options.ssl=false] Use SSL for connection
  * @param {boolean|function} [options.checkServerIdentity=true] Ensure we check server identify during SSL, set to false to disable checking. Only works for Node 0.12.x or higher. You can pass in a boolean or your own checkServerIdentity override function.
  * @param {Buffer} [options.ca] SSL Certificate store binary buffer

lib/mongo_client.js

@@ -97,7 +97,7 @@ const validOptions = require('./operations/connect').validOptions;
  * @param {boolean} [options.keepAlive=true] TCP Connection keep alive enabled
  * @param {number} [options.keepAliveInitialDelay=120000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
  * @param {number} [options.connectTimeoutMS=10000] How long to wait for a connection to be established before timing out
- * @param {number} [options.socketTimeoutMS=360000] How long a send or receive on a socket can take before timing out
+ * @param {number} [options.socketTimeoutMS=0] How long a send or receive on a socket can take before timing out
  * @param {number} [options.family] Version of IP stack. Can be 4, 6 or null (default).
  * If null, will attempt to connect with IPv6, and will fall back to IPv4 on failure
  * @param {number} [options.reconnectTries=30] Server attempt to reconnect #times
@@ -372,7 +372,7 @@ MongoClient.prototype.isConnected = function(options) {
  * @param {boolean} [options.keepAlive=true] TCP Connection keep alive enabled
  * @param {number} [options.keepAliveInitialDelay=120000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
  * @param {number} [options.connectTimeoutMS=10000] How long to wait for a connection to be established before timing out
- * @param {number} [options.socketTimeoutMS=360000] How long a send or receive on a socket can take before timing out
+ * @param {number} [options.socketTimeoutMS=0] How long a send or receive on a socket can take before timing out
  * @param {number} [options.family] Version of IP stack. Can be 4, 6 or null (default).
  * If null, will attempt to connect with IPv6, and will fall back to IPv4 on failure
  * @param {number} [options.reconnectTries=30] Server attempt to reconnect #times

lib/operations/connect.js

@@ -290,7 +290,7 @@ function connect(mongoClient, url, options, callback) {
     const _finalOptions = createUnifiedOptions(object, options);
 
     // Check if we have connection and socket timeout set
-    if (_finalOptions.socketTimeoutMS == null) _finalOptions.socketTimeoutMS = 360000;
+    if (_finalOptions.socketTimeoutMS == null) _finalOptions.socketTimeoutMS = 0;
     if (_finalOptions.connectTimeoutMS == null) _finalOptions.connectTimeoutMS = 10000;
     if (_finalOptions.retryWrites == null) _finalOptions.retryWrites = true;
     if (_finalOptions.useRecoveryToken == null) _finalOptions.useRecoveryToken = true;
@@ -788,7 +788,7 @@ function translateOptions(options, translationOptions) {
   }
 
   // Set the socket and connection timeouts
-  if (options.socketTimeoutMS == null) options.socketTimeoutMS = 360000;
+  if (options.socketTimeoutMS == null) options.socketTimeoutMS = 0;
   if (options.connectTimeoutMS == null) options.connectTimeoutMS = 10000;
 
   if (!translationOptions.createServers) {

lib/topologies/mongos.js

@@ -84,7 +84,7 @@ var legalOptionNames = [
  * @param {boolean} [options.socketOptions.keepAlive=true] TCP Connection keep alive enabled
  * @param {number} [options.socketOptions.keepAliveInitialDelay=120000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
  * @param {number} [options.socketOptions.connectTimeoutMS=10000] How long to wait for a connection to be established before timing out
- * @param {number} [options.socketOptions.socketTimeoutMS=360000] How long a send or receive on a socket can take before timing out
+ * @param {number} [options.socketOptions.socketTimeoutMS=0] How long a send or receive on a socket can take before timing out
  * @param {boolean} [options.domainsEnabled=false] Enable the wrapping of the callback in the current domain, disabled by default to avoid perf hit.
  * @param {boolean} [options.monitorCommands=false] Enable command monitoring for this topology
  * @fires Mongos#connect

lib/topologies/server.js

@@ -86,7 +86,7 @@ var legalOptionNames = [
  * @param {boolean} [options.socketOptions.keepAlive=true] TCP Connection keep alive enabled
  * @param {number} [options.socketOptions.keepAliveInitialDelay=120000] The number of milliseconds to wait before initiating keepAlive on the TCP socket
  * @param {number} [options.socketOptions.connectTimeoutMS=10000] How long to wait for a connection to be established before timing out
- * @param {number} [options.socketOptions.socketTimeoutMS=360000] How long a send or receive on a socket can take before timing out
+ * @param {number} [options.socketOptions.socketTimeoutMS=0] How long a send or receive on a socket can take before timing out
  * @param {number} [options.reconnectTries=30] Server attempt to reconnect #times
  * @param {number} [options.reconnectInterval=1000] Server will wait # milliseconds between retries
  * @param {boolean} [options.monitoring=true] Triggers the server instance to call ismaster

test/functional/collection.test.js

@@ -799,7 +799,7 @@ describe('Collection', function() {
 
           db.listCollections().toArray((err, documents) => {
             expect(err).to.not.exist;
-            expect(documents.length > 1).to.be.true;
+            expect(documents.length >= 1).to.be.true;
             let found = false;
 
             documents.forEach(document => {

test/functional/mongo_client.test.js

@@ -368,7 +368,7 @@ describe('MongoClient', function() {
 
         for (var i = 0; i < connections.length; i++) {
           test.equal(10000, connections[i].connectionTimeout);
-          test.equal(360000, connections[i].socketTimeout);
+          expect(connections[i].socketTimeout).to.equal(0);
         }
 
         client.close();
@@ -518,7 +518,10 @@ describe('MongoClient', function() {
         {},
         {
           keepAlive: true,
-          keepAliveInitialDelay: 100
+          keepAliveInitialDelay: 100,
+          // keepAliveInitialDelay is clamped to half the size of socketTimeout
+          // if socketTimeout is less than keepAliveInitialDelay
+          socketTimeout: 101
         }
       );
 

test/functional/mongo_client_options.test.js

@@ -1,7 +1,7 @@
 'use strict';
-const test = require('./shared').assert,
-  setupDatabase = require('./shared').setupDatabase,
-  expect = require('chai').expect;
+const test = require('./shared').assert;
+const setupDatabase = require('./shared').setupDatabase;
+const expect = require('chai').expect;
 
 describe('MongoClient Options', function() {
   before(function() {
@@ -96,6 +96,20 @@ describe('MongoClient Options', function() {
     }
   });
 
+  it('should default socketTimeout to infinity', function(done) {
+    const client = this.configuration.newClient();
+    client.connect(() => {
+      expect(client.s.options.socketTimeoutMS).to.deep.equal(0);
+      const connections = client.topology.s.coreTopology
+        ? client.topology.s.coreTopology.connections()
+        : [];
+      for (const connection of connections) {
+        expect(connection.socketTimeout).to.deep.equal(0);
+      }
+      client.close(done);
+    });
+  });
+
   /**
    * @ignore
    */

test/functional/operation_example.test.js

@@ -3936,15 +3936,17 @@ describe('Operation Examples', function() {
         // REMOVE-LINE done();
         // REMOVE-LINE var db = client.db(configuration.db);
         // BEGIN
+        expect(err).to.not.exist;
         var db = client.db(configuration.db);
-        test.equal(null, err);
-
-        // Retry to get the collection, should work as it's now created
-        db.collections(function(err, collections) {
-          test.equal(null, err);
-          test.ok(collections.length > 0);
+        db.createCollection('example', err => {
+          expect(err).to.not.exist;
+          // Retry to get the collection, should work as it's now created
+          db.collections(function(err, collections) {
+            expect(err).to.not.exist;
+            test.ok(collections.length > 0);
 
-          client.close(done);
+            client.close(done);
+          });
         });
       });
       // END

test/functional/operation_generators_example.test.js

@@ -2931,6 +2931,7 @@ describe('Operation (Generators)', function() {
           .newClient(configuration.writeConcernMax(), { poolSize: 1 })
           .connect();
         var db = client.db(configuration.db);
+        yield db.createCollection('example');
         // LINE var MongoClient = require('mongodb').MongoClient,
         // LINE   co = require('co');
         // LINE   test = require('assert');

test/functional/operation_promises_example.test.js

@@ -3149,22 +3149,28 @@ describe('Operation (Promises)', function() {
         auto_reconnect: false
       });
 
-      return client.connect().then(function(client) {
-        var db = client.db(configuration.db);
-        // LINE var MongoClient = require('mongodb').MongoClient,
-        // LINE   test = require('assert');
-        // LINE const client = new MongoClient('mongodb://localhost:27017/test');
-        // LINE client.connect().then(() => {
-        // LINE   var db = client.db('test);
-        // REPLACE configuration.writeConcernMax() WITH {w:1}
-        // REMOVE-LINE done();
-        // BEGIN
-        // Retry to get the collection, should work as it's now created
-        return db.collections().then(function(collections) {
+      return client
+        .connect()
+        .then(function(client) {
+          var db = client.db(configuration.db);
+          return db.createCollection('example');
+        })
+        .then(() => {
+          // LINE var MongoClient = require('mongodb').MongoClient,
+          // LINE   test = require('assert');
+          // LINE const client = new MongoClient('mongodb://localhost:27017/test');
+          // LINE client.connect().then(() => {
+          // LINE   var db = client.db('test);
+          // REPLACE configuration.writeConcernMax() WITH {w:1}
+          // REMOVE-LINE done();
+          // BEGIN
+          // Retry to get the collection, should work as it's now created
+          return client.db(configuration.db).collections();
+        })
+        .then(function(collections) {
           test.ok(collections.length > 0);
           return client.close();
         });
-      });
       // END
     }
   });

test/functional/replset_connection.test.js

@@ -1,6 +1,7 @@
 'use strict';
 var f = require('util').format;
 var test = require('./shared').assert;
+const expect = require('chai').expect;
 var setupDatabase = require('./shared').setupDatabase;
 
 var restartAndDone = function(configuration, done) {
@@ -595,7 +596,7 @@ describe.skip('ReplSet (Connection)', function() {
         var db = client.db(configuration.db);
 
         test.equal(500, client.topology.connections()[0].connectionTimeout);
-        test.equal(360000, client.topology.connections()[0].socketTimeout);
+        expect(client.topology.connections()[0].socketTimeout).to.equal(0);
 
         db.collection('replicaset_mongo_client_collection').update(
           { a: 1 },