SERVER-70100 Ensure at-least-once emission of oplog entry on shardCollection() completion

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mongo/db/s/create_collection_coordinator.cpp b/src/mongo/db/s/create_collection_coordinator.cpp
index 31d302b9989..2f3c292cc53 100644
--- a/src/mongo/db/s/create_collection_coordinator.cpp
+++ b/src/mongo/db/s/create_collection_coordinator.cpp
@@ -493,6 +493,13 @@ ExecutorFuture<void> CreateCollectionCoordinator::_runImpl(
                             getCollation(opCtx, nss(), _request.getCollation()).second,
                             _request.getUnique().value_or(false))) {
 
+                    // Ensure that the completion of the request gets recorded at least once on the
+                    // oplog.
+                    _writeOplogMessage(opCtx,
+                                       nss(),
+                                       *createCollectionResponseOpt->getCollectionUUID(),
+                                       _request.toBSON());
+
                     // The critical section can still be held here if the node committed the
                     // sharding of the collection but then it stepped down before it managed to
                     // delete the coordinator document