1 files changed, 50 insertions, 0 deletions
diff --git a/jstests/multiVersion/sharded_timeseries_collmod_mixed_version.js b/jstests/multiVersion/sharded_timeseries_collmod_mixed_version.js
new file mode 100644
index 00000000000..12c0f4bf6ef
--- /dev/null
+++ b/jstests/multiVersion/sharded_timeseries_collmod_mixed_version.js
@@ -0,0 +1,50 @@
+/**
+ * Tests latest shards can process collMod on time-series collection sent from old 5.0 mongos.
+ */
+
+(function() {
+"use strict";
+
+const dbName = 'testDB';
+const collName = 'testColl';
+const timeField = 'tm';
+const metaField = 'mt';
+const indexName = 'index';
+const viewNss = `${dbName}.${collName}`;
+
+const st = new ShardingTest(
+    {shards: 2, rs: {nodes: 3}, mongos: [{binVersion: 'latest'}, {binVersion: '5.0'}]});
+const mongos = st.s0;
+const db = mongos.getDB(dbName);
+
+assert.commandWorked(
+    mongos.adminCommand({setFeatureCompatibilityVersion: binVersionToFCV('latest')}));
+
+assert.commandWorked(
+    db.createCollection(collName, {timeseries: {timeField: timeField, metaField: metaField}}));
+assert.commandWorked(mongos.adminCommand({enableSharding: dbName}));
+assert.commandWorked(db[collName].createIndex({[metaField]: 1}, {name: indexName}));
+assert.commandWorked(mongos.adminCommand({
+    shardCollection: viewNss,
+    key: {[metaField]: 1},
+}));
+
+assert.commandWorked(mongos.adminCommand({setFeatureCompatibilityVersion: '5.0'}));
+
+const oldDb = st.s1.getDB(dbName);
+// Assert that collMod works with matching versions of mongos and mongod.
+assert.commandWorked(db.runCommand({collMod: collName, index: {name: indexName, hidden: true}}));
+// Assert that collMod still works with old version of mongos.
+assert.commandWorked(
+    oldDb.runCommand({collMod: collName, index: {name: indexName, hidden: false}}));
+
+// Assert that collMod with granularity update fails with matching versions of mongos and mongod.
+assert.commandFailedWithCode(db.runCommand({collMod: collName, timeseries: {granularity: 'hours'}}),
+                             ErrorCodes.NotImplemented);
+// Assert that collMod with granularity update still fails with old version of mongos.
+assert.commandFailedWithCode(
+    oldDb.runCommand({collMod: collName, timeseries: {granularity: 'hours'}}),
+    ErrorCodes.NotImplemented);
+
+st.stop();
+})();