1 files changed, 42 insertions, 0 deletions
diff --git a/jstests/multiVersion/secondary_reads_in_mixed_version_shard_replica_set.js b/jstests/multiVersion/secondary_reads_in_mixed_version_shard_replica_set.js
new file mode 100644
index 00000000000..5a1fc9d86b3
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+++ b/jstests/multiVersion/secondary_reads_in_mixed_version_shard_replica_set.js
@@ -0,0 +1,42 @@
+//
+// Testing migrations between latest and last-stable mongod versions, where the
+// donor is the latest version and the recipient the last-stable, and vice versa.
+// Migrations should be successful.
+//
+
+// Checking UUID consistency involves talking to a shard node, which in this test is shutdown
+TestData.skipCheckingUUIDsConsistentAcrossCluster = true;
+
+(function() {
+    "use strict";
+
+    var mixedShard = new ReplSetTest({
+        name: 'MixedVersionShard',
+        nodes: [
+            {binVersion: "last-stable", rsConfig: {votes: 1}},
+            {binVersion: "latest", rsConfig: {priority: 0, votes: 0}}
+        ]
+    });
+    mixedShard.startSet();
+    mixedShard.initiate();
+    mixedShard.restart(0, {'shardsvr': ""});
+    mixedShard.restart(1, {'shardsvr': ""});
+
+    var st = new ShardingTest(
+        {mongosOptions: {binVersion: "last-stable"}, shards: 0, manualAddShard: true});
+    assert.commandWorked(st.addShard(mixedShard.getURL()));
+
+    // Ensure the secondary node also knows that it is sharded by waiting for the identity document
+    // write to propagate
+    mixedShard.awaitReplication();
+
+    assert.commandWorked(st.s0.adminCommand({enableSharding: 'TestDB'}));
+    assert.commandWorked(st.s0.adminCommand({shardCollection: 'TestDB.TestColl', key: {x: 1}}));
+
+    let db = st.s0.getDB('TestDB');
+    assert.commandWorked(db.runCommand(
+        {find: 'TestColl', $readPreference: {mode: 'secondary'}, readConcern: {'level': 'local'}}));
+
+    st.stop();
+    mixedShard.stopSet();
+})();