SERVER-21996 Wait for replication to all nodes before shutting down config server primary in testr3.2.1-rc1

(cherry picked from commit ae83937130d1abc097e2694de97bf9ea59ed2f32)

1 files changed, 4 insertions, 0 deletions

diff --git a/jstests/sharding/replset_config/autodiscover_config_rs_from_secondary.js b/jstests/sharding/replset_config/autodiscover_config_rs_from_secondary.js
index eb26f0f11ba..d0c4e84d8bd 100644
--- a/jstests/sharding/replset_config/autodiscover_config_rs_from_secondary.js
+++ b/jstests/sharding/replset_config/autodiscover_config_rs_from_secondary.js
@@ -25,6 +25,10 @@ var seedList = rst.name + "/" + rst.nodes[1].host; // node 1 is guaranteed to no
     MongoRunner.stopMongos(mongos);
 }
 
+// Wait for replication to all config server replica set members to ensure that mongos
+// doesn't read from a stale config server when trying to verify if the initial cluster metadata
+// has been properly written.
+rst.awaitReplication();
 // Now take down the one electable node
 rst.stop(0);
 rst.awaitNoPrimary();