diff --git a/modules/core/src/main/java/org/apache/ignite/internal/managers/discovery/DiscoveryMessageFactory.java b/modules/core/src/main/java/org/apache/ignite/internal/managers/discovery/DiscoveryMessageFactory.java
index a225c1abec7bf..150813ca0f46a 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/managers/discovery/DiscoveryMessageFactory.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/managers/discovery/DiscoveryMessageFactory.java
@@ -17,6 +17,10 @@
 
 package org.apache.ignite.internal.managers.discovery;
 
+import org.apache.ignite.internal.processors.metastorage.persistence.DistributedMetaStorageCasAckMessage;
+import org.apache.ignite.internal.processors.metastorage.persistence.DistributedMetaStorageCasAckMessageSerializer;
+import org.apache.ignite.internal.processors.metastorage.persistence.DistributedMetaStorageUpdateAckMessage;
+import org.apache.ignite.internal.processors.metastorage.persistence.DistributedMetaStorageUpdateAckMessageSerializer;
 import org.apache.ignite.plugin.extensions.communication.MessageFactory;
 import org.apache.ignite.plugin.extensions.communication.MessageFactoryProvider;
 import org.apache.ignite.spi.discovery.tcp.internal.DiscoveryDataPacket;
@@ -113,5 +117,8 @@ public class DiscoveryMessageFactory implements MessageFactoryProvider {
         factory.register((short)18, TcpDiscoveryStatusCheckMessage::new, new TcpDiscoveryStatusCheckMessageSerializer());
         factory.register((short)19, TcpDiscoveryNodeAddFinishedMessage::new, new TcpDiscoveryNodeAddFinishedMessageSerializer());
         factory.register((short)20, TcpDiscoveryJoinRequestMessage::new, new TcpDiscoveryJoinRequestMessageSerializer());
+        factory.register((short)21, DistributedMetaStorageUpdateAckMessage::new, new DistributedMetaStorageUpdateAckMessageSerializer());
+        factory.register((short)22, DistributedMetaStorageCasAckMessage::new, new DistributedMetaStorageCasAckMessageSerializer());
+
     }
 }
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasAckMessage.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasAckMessage.java
index 30dda350ec66a..0f02e5a4c800d 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasAckMessage.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasAckMessage.java
@@ -18,26 +18,34 @@
 package org.apache.ignite.internal.processors.metastorage.persistence;
 
 import java.util.UUID;
+import org.apache.ignite.internal.Order;
+import org.apache.ignite.internal.managers.discovery.DiscoveryMessageFactory;
 import org.apache.ignite.internal.util.typedef.internal.S;
 
 /** */
-class DistributedMetaStorageCasAckMessage extends DistributedMetaStorageUpdateAckMessage {
+public class DistributedMetaStorageCasAckMessage extends DistributedMetaStorageUpdateAckMessage {
     /** */
     private static final long serialVersionUID = 0L;
 
     /** */
-    private final boolean updated;
+    @Order(2)
+    boolean updated;
+
+    /** Empty constructor of {@link DiscoveryMessageFactory}. */
+    public DistributedMetaStorageCasAckMessage() {
+        // No-op.
+    }
 
     /** */
-    public DistributedMetaStorageCasAckMessage(UUID reqId, String errorMsg, boolean updated) {
-        super(reqId, errorMsg);
+    public DistributedMetaStorageCasAckMessage(UUID reqId, boolean updated) {
+        super(reqId);
 
         this.updated = updated;
     }
 
-    /** */
-    public boolean updated() {
-        return updated;
+    /** {@inheritDoc} */
+    @Override public short directType() {
+        return 22;
     }
 
     /** {@inheritDoc} */
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasMessage.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasMessage.java
index fa279596cba85..88f64122892d4 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasMessage.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageCasMessage.java
@@ -57,7 +57,7 @@ public boolean matches() {
 
     /** {@inheritDoc} */
     @Override @Nullable public DiscoveryCustomMessage ackMessage() {
-        return new DistributedMetaStorageCasAckMessage(requestId(), errorMessage(), matches);
+        return new DistributedMetaStorageCasAckMessage(requestId(), matches);
     }
 
     /** {@inheritDoc} */
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageImpl.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageImpl.java
index 147b98ceead25..4907f42e2e066 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageImpl.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageImpl.java
@@ -1128,9 +1128,6 @@ private void onUpdateMessage(
         ClusterNode node,
         DistributedMetaStorageUpdateMessage msg
     ) {
-        if (msg.errorMessage() != null)
-            return;
-
         lock.writeLock().lock();
 
         try {
@@ -1163,20 +1160,14 @@ private void onAckMessage(
         ClusterNode node,
         DistributedMetaStorageUpdateAckMessage msg
     ) {
-        GridFutureAdapter<Boolean> fut = updateFuts.remove(msg.requestId());
+        GridFutureAdapter<Boolean> fut = updateFuts.remove(msg.reqId);
 
         if (fut != null) {
-            String errorMsg = msg.errorMessage();
-
-            if (errorMsg == null) {
-                Boolean res = msg instanceof DistributedMetaStorageCasAckMessage
-                    ? ((DistributedMetaStorageCasAckMessage)msg).updated()
-                    : null;
+            Boolean res = msg instanceof DistributedMetaStorageCasAckMessage
+                ? ((DistributedMetaStorageCasAckMessage)msg).updated
+                : null;
 
-                fut.onDone(res);
-            }
-            else
-                fut.onDone(new IllegalStateException(errorMsg));
+            fut.onDone(res);
         }
     }
 
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateAckMessage.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateAckMessage.java
index 9008f8b72579e..95943903d719c 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateAckMessage.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateAckMessage.java
@@ -18,32 +18,39 @@
 package org.apache.ignite.internal.processors.metastorage.persistence;
 
 import java.util.UUID;
+import org.apache.ignite.internal.Order;
 import org.apache.ignite.internal.managers.discovery.DiscoCache;
 import org.apache.ignite.internal.managers.discovery.DiscoveryCustomMessage;
+import org.apache.ignite.internal.managers.discovery.DiscoveryMessageFactory;
 import org.apache.ignite.internal.managers.discovery.GridDiscoveryManager;
 import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion;
 import org.apache.ignite.internal.util.typedef.internal.S;
 import org.apache.ignite.lang.IgniteUuid;
+import org.apache.ignite.plugin.extensions.communication.Message;
 import org.jetbrains.annotations.Nullable;
 
 /** */
-class DistributedMetaStorageUpdateAckMessage implements DiscoveryCustomMessage {
+public class DistributedMetaStorageUpdateAckMessage implements DiscoveryCustomMessage, Message {
     /** */
     private static final long serialVersionUID = 0L;
 
     /** */
-    private final IgniteUuid id = IgniteUuid.randomUuid();
+    @Order(0)
+    IgniteUuid id;
 
     /** Request ID. */
-    private final UUID reqId;
+    @Order(1)
+    UUID reqId;
 
-    /** */
-    private final String errorMsg;
+    /** Empty constructor of {@link DiscoveryMessageFactory}. */
+    public DistributedMetaStorageUpdateAckMessage() {
+        // No-op.
+    }
 
     /** */
-    public DistributedMetaStorageUpdateAckMessage(UUID reqId, String errorMsg) {
+    public DistributedMetaStorageUpdateAckMessage(UUID reqId) {
+        id = IgniteUuid.randomUuid();
         this.reqId = reqId;
-        this.errorMsg = errorMsg;
     }
 
     /** {@inheritDoc} */
@@ -51,16 +58,6 @@ public DistributedMetaStorageUpdateAckMessage(UUID reqId, String errorMsg) {
         return id;
     }
 
-    /** */
-    public UUID requestId() {
-        return reqId;
-    }
-
-    /** */
-    public String errorMessage() {
-        return errorMsg;
-    }
-
     /** {@inheritDoc} */
     @Override @Nullable public DiscoveryCustomMessage ackMessage() {
         return null;
@@ -80,6 +77,11 @@ public String errorMessage() {
         throw new UnsupportedOperationException();
     }
 
+    /** {@inheritDoc} */
+    @Override public short directType() {
+        return 21;
+    }
+
     /** {@inheritDoc} */
     @Override public String toString() {
         return S.toString(DistributedMetaStorageUpdateAckMessage.class, this);
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateMessage.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateMessage.java
index 3b9e462200133..372a676530dac 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateMessage.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/metastorage/persistence/DistributedMetaStorageUpdateMessage.java
@@ -46,9 +46,6 @@ class DistributedMetaStorageUpdateMessage implements DiscoveryCustomMessage {
     /** */
     private final byte[] valBytes;
 
-    /** */
-    private String errorMsg;
-
     /** */
     public DistributedMetaStorageUpdateMessage(UUID reqId, String key, byte[] valBytes) {
         this.reqId = reqId;
@@ -76,14 +73,9 @@ public byte[] value() {
         return valBytes;
     }
 
-    /** */
-    protected String errorMessage() {
-        return errorMsg;
-    }
-
     /** {@inheritDoc} */
     @Override @Nullable public DiscoveryCustomMessage ackMessage() {
-        return new DistributedMetaStorageUpdateAckMessage(reqId, errorMsg);
+        return new DistributedMetaStorageUpdateAckMessage(reqId);
     }
 
     /** {@inheritDoc} */