strict writing data validation

ydb/core/kqp/common/kqp_tx_manager.cpp

@@ -278,17 +278,17 @@ class TKqpTransactionManager : public IKqpTransactionManager {
         for (auto& [shardId, shardInfo] : ShardsInfo) {
             if ((shardInfo.Flags & EAction::WRITE)) {
                 ReceivingShards.insert(shardId);
+                if (shardInfo.IsOlap) {
+                    receivingColumnShardsSet.insert(shardId);
+                }
                 if (IsVolatile()) {
                     SendingShards.insert(shardId);
                 }
-                if (shardInfo.IsOlap) {
-                    sendingColumnShardsSet.insert(shardId);
-                }
             }
             if (!shardInfo.Locks.empty()) {
                 SendingShards.insert(shardId);
                 if (shardInfo.IsOlap) {
-                    receivingColumnShardsSet.insert(shardId);
+                    sendingColumnShardsSet.insert(shardId);
                 }
             }
 
@@ -325,6 +325,7 @@ class TKqpTransactionManager : public IKqpTransactionManager {
             auto arbiterIterator = std::begin(shards);
             std::advance(arbiterIterator, index);
             ArbiterColumnShard = *arbiterIterator;
+            ReceivingShards.insert(*ArbiterColumnShard);
         }
 
         ShardsToWaitPrepare = ShardsIds;

ydb/core/kqp/executer_actor/kqp_data_executer.cpp

@@ -2561,6 +2561,7 @@ class TKqpDataExecuter : public TKqpExecuterBase<TKqpDataExecuter, EExecType::Da
                     auto arbiterIterator = std::begin(shards);
                     std::advance(arbiterIterator, index);
                     columnShardArbiter = *arbiterIterator;
+                    receivingShardsSet.insert(*columnShardArbiter);
                 }
             }
 

ydb/core/tx/columnshard/columnshard__write.cpp

@@ -315,18 +315,28 @@ class TCommitOperation {
         LockId = lock.GetLockId();
         SendingShards = std::set<ui64>(locks.GetSendingShards().begin(), locks.GetSendingShards().end());
         ReceivingShards = std::set<ui64>(locks.GetReceivingShards().begin(), locks.GetReceivingShards().end());
-        const bool singleShardTx = SendingShards.empty() && ReceivingShards.empty();
-        if (!singleShardTx) {
+        if (SendingShards.empty() != ReceivingShards.empty()) {
+            return TConclusionStatus::Fail("incorrect synchronization data (send/receiving lists)");
+        }
+        if (ReceivingShards.size() && SendingShards.size()) {
             if (!ReceivingShards.contains(TabletId) && !SendingShards.contains(TabletId)) {
-                return TConclusionStatus::Fail("shard is absent in sending and receiving lists");
+                return TConclusionStatus::Fail("current tablet_id is absent in sending and receiving lists");
             }
-            if (locks.HasArbiterColumnShard()) {
-                ArbiterColumnShard = locks.GetArbiterColumnShard();
-            } else {
-                AFL_VERIFY(!ReceivingShards.empty());
-                ArbiterColumnShard = *ReceivingShards.begin();
+            if (!locks.HasArbiterColumnShard()) {
+                return TConclusionStatus::Fail("no arbiter info in request");
+            }
+            ArbiterColumnShard = locks.GetArbiterColumnShard();
+
+            if (IsPrimary() && !ReceivingShards.contains(ArbiterColumnShard)) {
+                AFL_WARN(NKikimrServices::TX_COLUMNSHARD_WRITE)("event", "incorrect arbiter")("arbiter_id", ArbiterColumnShard)(
+                    "receiving", JoinSeq(", ", ReceivingShards))("sending", JoinSeq(", ", SendingShards));
+                return TConclusionStatus::Fail("arbiter is absent in receiving lists");
+            }
+            if (!IsPrimary() && (!ReceivingShards.contains(ArbiterColumnShard) || !SendingShards.contains(ArbiterColumnShard))) {
+                AFL_WARN(NKikimrServices::TX_COLUMNSHARD_WRITE)("event", "incorrect arbiter")("arbiter_id", ArbiterColumnShard)(
+                    "receiving", JoinSeq(", ", ReceivingShards))("sending", JoinSeq(", ", SendingShards));
+                return TConclusionStatus::Fail("arbiter is absent in sending or receiving lists");
             }
-            AFL_VERIFY(ArbiterColumnShard);
         }
 
         Generation = lock.GetGeneration();

ydb/core/tx/columnshard/transactions/operators/ev_write/primary.h

@@ -159,7 +159,8 @@ class TEvWriteCommitPrimaryTransactionOperator: public TEvWriteCommitSyncTransac
     };
 
     virtual bool IsTxBroken() const override {
-        return TxBroken.value_or(false);
+        AFL_VERIFY(TxBroken);
+        return *TxBroken;
     }
 
     void InitializeRequests(TColumnShard& owner) {