SERVER-37382 printShardingStatus.js races with ShardingUptimeReporter thread

(cherry picked from commit ae932281fe1677400456ee5297764606cac6f577)

1 files changed, 9 insertions, 1 deletions

diff --git a/jstests/sharding/printShardingStatus.js b/jstests/sharding/printShardingStatus.js
index cf2b8d454a0..cfc6e155672 100644
--- a/jstests/sharding/printShardingStatus.js
+++ b/jstests/sharding/printShardingStatus.js
@@ -5,13 +5,21 @@
 (function() {
     'use strict';
 
-    var st = new ShardingTest({shards: 1, mongos: 2, config: 1, other: {smallfiles: true}});
+    const MONGOS_COUNT = 2;
+    var st =
+        new ShardingTest({shards: 1, mongos: MONGOS_COUNT, config: 1, other: {smallfiles: true}});
 
     var standalone = MongoRunner.runMongod();
 
     var mongos = st.s0;
     var admin = mongos.getDB("admin");
 
+    // Wait for the background thread from the mongos to insert their entries before beginning
+    // the tests.
+    assert.soon(function() {
+        return MONGOS_COUNT == mongos.getDB('config').mongos.count();
+    });
+
     function grabStatusOutput(configdb, verbose) {
         var res = print.captureAllOutput(function() {
             return printShardingStatus(configdb, verbose);