1 files changed, 47 insertions, 0 deletions
diff --git a/jstests/multiVersion/ttl_expire_nan_initial_sync.js b/jstests/multiVersion/ttl_expire_nan_initial_sync.js
new file mode 100644
index 00000000000..78ff4295cd1
--- /dev/null
+++ b/jstests/multiVersion/ttl_expire_nan_initial_sync.js
@@ -0,0 +1,47 @@
+/**
+ * Tests that adding a node running a 5.0+ binary to an existing 4.4 cluster containing
+ * a TTL index with NaN for 'expireAfterSeconds' will trigger a fassert on startup.
+ *
+ * @tags: [
+ *     requires_replication,
+ * ]
+ */
+(function() {
+'use strict';
+
+load('jstests/noPassthrough/libs/index_build.js');
+
+const rst = new ReplSetTest({
+    nodes: [{binVersion: 'last-lts'}],
+});
+rst.startSet();
+rst.initiate();
+
+let primary = rst.getPrimary();
+const db = primary.getDB('test');
+const coll = db.t;
+
+assert.commandWorked(coll.createIndex({t: 1}, {expireAfterSeconds: NaN}));
+assert.commandWorked(coll.insert({_id: 0, t: ISODate()}));
+
+const newNode = rst.add({
+    binVersion: 'latest',
+    rsConfig: {votes: 0, priority: 0},
+    setParameter: {numInitialSyncAttempts: 1},
+});
+rst.reInitiate();
+
+// Confirm that we are unable to use a 5.0+ server binary to join the replica set.
+assert.soon(() => {
+    return rawMongoProgramOutput().search(/Fatal assertion/) >= 0;
+});
+rst.stop(newNode, /*signal=*/undefined, {allowedExitCode: MongoRunner.EXIT_ABRUPT});
+
+// Failed startup logs should contain details on the invalid TTL index.
+assert.gte(
+    rawMongoProgramOutput().search(
+        /Fatal assertion.*40088.*CannotCreateIndex.*t_1.*TTL indexes cannot have NaN 'expireAfterSeconds'/),
+    0);
+
+rst.stopSet();
+})();