SERVER-34733 mongos needs to also refresh db version after receiving onImplicitCreate error

1 files changed, 32 insertions, 0 deletions

diff --git a/jstests/sharding/unsharded_collection_targetting.js b/jstests/sharding/unsharded_collection_targetting.js
new file mode 100644
index 00000000000..efe4c3c05c4
--- /dev/null
+++ b/jstests/sharding/unsharded_collection_targetting.js
@@ -0,0 +1,32 @@
+// Tests that a stale mongos would route writes correctly to the right shard after
+// an unsharded collection was moved to another shard.
+(function() {
+    "use strict";
+
+    const st = new ShardingTest({
+        shards: 2,
+        mongos: 2,
+        rs: {
+            nodes: 1,
+        },
+    });
+
+    const testName = 'test';
+    const mongosDB = st.s0.getDB(testName);
+
+    // Ensure that shard1 is the primary shard.
+    assert.commandWorked(mongosDB.adminCommand({enableSharding: mongosDB.getName()}));
+    st.ensurePrimaryShard(mongosDB.getName(), st.rs1.getURL());
+
+    // Before moving the collection, issue a write through mongos2 to make it aware
+    // about the location of the collection before the move.
+    const mongos2DB = st.s1.getDB(testName);
+    const mongos2Coll = mongos2DB[testName];
+    assert.writeOK(mongos2Coll.insert({_id: 0, a: 0}));
+
+    st.ensurePrimaryShard(mongosDB.getName(), st.rs0.getURL());
+
+    assert.writeOK(mongos2Coll.insert({_id: 1, a: 0}));
+
+    st.stop();
+})();