Improve primary detection mechanism to be compatible with older mongodb instances

Generate 2.6 beta 2

packages/allow-deny/package.js

@@ -1,6 +1,6 @@
 Package.describe({
   name: 'allow-deny',
-  version: '1.1.1-beta260.1',
+  version: '1.1.1-beta260.2',
   // Brief, one-line summary of the package.
   summary: 'Implements functionality for allow/deny and client-side db operations',
   // URL to the Git repository containing the source code for this package.

packages/meteor-tool/package.js

@@ -1,6 +1,6 @@
 Package.describe({
   summary: 'The Meteor command-line tool',
-  version: '2.6.0-beta.1',
+  version: '2.6.0-beta.2',
 });
 
 Package.includeTool();

packages/minimongo/package.js

@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Meteor's client-side datastore: a port of MongoDB to Javascript",
-  version: '1.8.0-beta260.1'
+  version: '1.8.0-beta260.2'
 });
 
 Package.onUse(api => {

packages/mongo/mongo_driver.js

@@ -195,12 +195,15 @@ MongoConnection = function (url, options) {
         try {
           const helloDocument = db.admin().command({hello: 1}).await();
           // First, figure out what the current primary is, if any.
-          if (helloDocument.isWritablePrimary) {
+          if (helloDocument.primary) {
             self._primary = helloDocument.primary;
           }
         }catch(_){
-          if (db.serverConfig && db.serverConfig.isMasterDoc) {
-            self._primary = db.serverConfig.isMasterDoc.primary;
+          // ismaster command is supported on older mongodb versions
+          const isMasterDocument = db.admin().command({ismaster:1}).await();
+          // First, figure out what the current primary is, if any.
+          if (isMasterDocument.primary) {
+            self._primary = isMasterDocument.primary;
           }
         }
 

packages/mongo/package.js

@@ -9,7 +9,7 @@
 
 Package.describe({
   summary: "Adaptor for using MongoDB and Minimongo over DDP",
-  version: '1.14.0-beta260.1'
+  version: '1.14.0-beta260.2'
 });
 
 Npm.depends({

packages/npm-mongo/package.js

@@ -3,7 +3,7 @@
 
 Package.describe({
   summary: "Wrapper around the mongo npm package",
-  version: "4.3.0-beta260.1",
+  version: "4.3.0-beta260.2",
   documentation: null
 });
 

packages/tinytest/package.js

@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Tiny testing framework",
-  version: '1.2.1-beta260.1'
+  version: '1.2.1-beta260.2'
 });
 
 Package.onUse(function (api) {

scripts/admin/meteor-release-experimental.json

@@ -1,6 +1,6 @@
 {
   "track": "METEOR",
-  "version": "2.6-beta.1",
+  "version": "2.6-beta.2",
   "recommended": false,
   "official": false,
   "description": "Meteor experimental release"