1 files changed, 8 insertions, 0 deletions
diff --git a/src/mongo/db/s/add_shard_cmd.cpp b/src/mongo/db/s/add_shard_cmd.cpp
index 3bfc1cc4a18..af64045ca6a 100644
--- a/src/mongo/db/s/add_shard_cmd.cpp
+++ b/src/mongo/db/s/add_shard_cmd.cpp
@@ -72,6 +72,14 @@ public:
             auto addShardCmd = request();
             auto shardIdUpsertCmd =
                 add_shard_util::createShardIdentityUpsertForAddShard(addShardCmd);
+
+            // A request dispatched through a local client is served within the same thread that
+            // submits it (so that the opCtx needs to be used as the vehicle to pass the WC to the
+            // ServiceEntryPoint).
+            const auto originalWC = opCtx->getWriteConcern();
+            ScopeGuard resetWCGuard([&] { opCtx->setWriteConcern(originalWC); });
+            opCtx->setWriteConcern(ShardingCatalogClient::kMajorityWriteConcern);
+
             DBDirectClient localClient(opCtx);
             BSONObj res;