1 files changed, 8 insertions, 3 deletions
diff --git a/src/mongo/db/index_builder.cpp b/src/mongo/db/index_builder.cpp
index a2f25c3475c..6f5804d17c4 100644
--- a/src/mongo/db/index_builder.cpp
+++ b/src/mongo/db/index_builder.cpp
@@ -166,9 +166,14 @@ Status IndexBuilder::_build(OperationContext* opCtx,
         Lock::CollectionLock collLock(opCtx, ns, MODE_IX);
         // WriteConflict exceptions and statuses are not expected to escape this method.
         status = indexer.insertAllDocumentsInCollection(opCtx, coll);
-    }
-    if (!status.isOK()) {
-        return status;
+        if (!status.isOK()) {
+            return status;
+        }
+
+        status = indexer.checkConstraints(opCtx);
+        if (!status.isOK()) {
+            return status;
+        }
     }
 
     status = writeConflictRetry(opCtx, "Commit index build", ns.ns(), [opCtx, coll, &indexer, &ns] {