From 3cc8358b89af7a864d6ecf745b581c063dca3ecd Mon Sep 17 00:00:00 2001
From: Antonio Andelic <antonio@clickhouse.com>
Date: Wed, 20 Dec 2023 10:20:23 +0000
Subject: [PATCH] Avoid preprocessing if Keeper leader is not ready

---
 src/Coordination/KeeperServer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Coordination/KeeperServer.cpp b/src/Coordination/KeeperServer.cpp
index bc5e3a723f2..638ee11858a 100644
--- a/src/Coordination/KeeperServer.cpp
+++ b/src/Coordination/KeeperServer.cpp
@@ -859,6 +859,10 @@ nuraft::cb_func::ReturnCode KeeperServer::callbackFunc(nuraft::cb_func::Type typ
             initial_batch_committed = true;
             return nuraft::cb_func::ReturnCode::Ok;
         }
+        case nuraft::cb_func::PreAppendLogLeader:
+        {
+            return nuraft::cb_func::ReturnCode::ReturnNull;
+        }
         case nuraft::cb_func::PreAppendLogFollower:
         {
             const auto & entry = *static_cast<LogEntryPtr *>(param->ctx);