PragmaTwice commented on code in PR #2210:
URL: https://github.com/apache/kvrocks/pull/2210#discussion_r1545602560


##########
src/cluster/cluster.cc:
##########
@@ -828,3 +828,31 @@ Status Cluster::CanExecByMySelf(const 
redis::CommandAttributes *attributes, cons
   return {Status::RedisExecErr,
           fmt::format("MOVED {} {}:{}", slot, slots_nodes_[slot]->host, 
slots_nodes_[slot]->port)};
 }
+
+Status Cluster::Reset() {
+  if (srv_->slot_migrator && srv_->slot_migrator->GetMigratingSlot() != -1) {
+    return {Status::NotOK, "Can't reset cluster while migrating slot"};
+  }
+  if (srv_->slot_import && srv_->slot_import->GetSlot() != -1) {
+    return {Status::NotOK, "Can't reset cluster while importing slot"};
+  }
+  if (!srv_->storage->IsEmptyDB()) {
+    return {Status::NotOK, "Can't reset cluster while database is not empty"};
+  }
+
+  version_ = -1;
+  size_ = 0;
+  myid_.clear();
+  myself_.reset();
+
+  nodes_.clear();
+  for (auto &n : slots_nodes_) {
+    n = nullptr;
+  }

Review Comment:
   why we need to set all elements to `nullptr` instead of `clear()`?



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