SERVER-85515 Explicitly create config.databases on config server initialization (#18215)r7.3.0-rc0

GitOrigin-RevId: 6778455519a9bcf479ff3ed94c24d28fe67b31d6

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mongo/db/s/config/sharding_catalog_manager.cpp b/src/mongo/db/s/config/sharding_catalog_manager.cpp
index d2def9fad1e..5c5eb2c24be 100644
--- a/src/mongo/db/s/config/sharding_catalog_manager.cpp
+++ b/src/mongo/db/s/config/sharding_catalog_manager.cpp
@@ -783,6 +783,12 @@ Status ShardingCatalogManager::_initConfigIndexes(OperationContext* opCtx) {
     }
 
     result = createIndexOnConfigCollection(
+        opCtx, NamespaceString::kConfigDatabasesNamespace, BSON("_id" << 1), unique);
+    if (!result.isOK()) {
+        return result.withContext("couldn't create _id_ index on config db");
+    }
+
+    result = createIndexOnConfigCollection(
         opCtx, NamespaceString::kConfigsvrShardsNamespace, BSON(ShardType::host() << 1), unique);
     if (!result.isOK()) {
         return result.withContext("couldn't create host_1 index on config db");