1 files changed, 73 insertions, 0 deletions
diff --git a/jstests/sharding/repl_monitor_refresh.js b/jstests/sharding/repl_monitor_refresh.js
new file mode 100644
index 00000000000..7214cb2081b
--- /dev/null
+++ b/jstests/sharding/repl_monitor_refresh.js
@@ -0,0 +1,73 @@
+/**
+ * Test for making sure that the replica seed list in the config server does not
+ * become invalid when a replica set reconfig happens.
+ */
+
+var NODE_COUNT = 3;
+var st = new ShardingTest({ shards: { rs0: { nodes: NODE_COUNT, oplogSize: 10 }},
+    separateConfig: true });
+var replTest = st.rs0;
+var mongos = st.s;
+
+var shardDoc = mongos.getDB('config').shards.findOne();
+assert.eq(NODE_COUNT, shardDoc.host.split(',').length); // seed list should contain all nodes
+
+/* Make sure that the first node is not the primary (by making the second one primary).
+ * We need to do this since the ReplicaSetMonitor iterates over the nodes one
+ * by one and you can't remove a node that is currently the primary.
+ */
+var connPoolStats = mongos.getDB('admin').runCommand({ connPoolStats: 1 });
+var targetHostName = connPoolStats['replicaSets'][replTest.name].hosts[1].addr;
+
+var priConn = replTest.getPrimary();
+var confDoc = priConn.getDB("local").system.replset.findOne();
+
+for (var idx = 0; idx < confDoc.members.length; idx++) {
+    if (confDoc.members[idx].host == targetHostName) {
+        confDoc.members[idx].priority = 100;
+    }
+    else {
+        confDoc.members[idx].priority = 1;
+    }
+}
+
+confDoc.version++;
+
+jsTest.log('Changing conf to ' + tojson(confDoc));
+
+try {
+    priConn.getDB('admin').adminCommand({ replSetReconfig: confDoc });
+} catch (x) {
+    print('Expected exception because of reconfig' + x);
+}
+
+ReplSetTest.awaitRSClientHosts(mongos, { host: targetHostName },
+    { ok: true, ismaster: true });
+
+// Remove first node from set
+confDoc.members.shift();
+confDoc.version++;
+
+try {
+    replTest.getPrimary().getDB('admin').adminCommand({ replSetReconfig: confDoc });
+} catch (x) {
+    print('Expected exception because of reconfig: ' + x);
+}
+
+assert.soon(function() {
+    var connPoolStats = mongos.getDB('admin').runCommand('connPoolStats');
+    var replView = connPoolStats.replicaSets[replTest.name].hosts;
+    jsTest.log('current replView: ' + tojson(replView));
+
+    return replView.length == NODE_COUNT - 1;
+});
+
+assert.soon(function() {
+    shardDoc = mongos.getDB('config').shards.findOne();
+    jsTest.log('shardDoc: ' + tojson(shardDoc));
+    // seed list should contain one less node
+    return shardDoc.host.split(',').length == NODE_COUNT - 1;
+});
+
+st.stop();
+