diff --git a/modules/core/src/main/java/org/apache/ignite/internal/GridJobSiblingsResponse.java b/modules/core/src/main/java/org/apache/ignite/internal/GridJobSiblingsResponse.java
index 314e00d4b9cf0..9aeb780795fd0 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/GridJobSiblingsResponse.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/GridJobSiblingsResponse.java
@@ -17,7 +17,6 @@
 
 package org.apache.ignite.internal;
 
-import java.nio.ByteBuffer;
 import java.util.Collection;
 import org.apache.ignite.IgniteCheckedException;
 import org.apache.ignite.compute.ComputeJobSibling;
@@ -25,8 +24,6 @@
 import org.apache.ignite.internal.util.typedef.internal.U;
 import org.apache.ignite.marshaller.Marshaller;
 import org.apache.ignite.plugin.extensions.communication.Message;
-import org.apache.ignite.plugin.extensions.communication.MessageReader;
-import org.apache.ignite.plugin.extensions.communication.MessageWriter;
 import org.jetbrains.annotations.Nullable;
 
 /**
@@ -34,10 +31,10 @@
  */
 public class GridJobSiblingsResponse implements Message {
     /** */
-    @GridDirectTransient
-    private Collection<ComputeJobSibling> siblings;
+    private @Nullable Collection<ComputeJobSibling> siblings;
 
     /** */
+    @Order(0)
     private byte[] siblingsBytes;
 
     /**
@@ -49,70 +46,56 @@ public GridJobSiblingsResponse() {
 
     /**
      * @param siblings Siblings.
-     * @param siblingsBytes Serialized siblings.
      */
-    public GridJobSiblingsResponse(@Nullable Collection<ComputeJobSibling> siblings, @Nullable byte[] siblingsBytes) {
+    public GridJobSiblingsResponse(@Nullable Collection<ComputeJobSibling> siblings) {
         this.siblings = siblings;
-        this.siblingsBytes = siblingsBytes;
     }
 
     /**
      * @return Job siblings.
      */
-    public Collection<ComputeJobSibling> jobSiblings() {
+    public @Nullable Collection<ComputeJobSibling> jobSiblings() {
         return siblings;
     }
 
     /**
-     * @param marsh Marshaller.
-     * @throws IgniteCheckedException In case of error.
+     * @return Serialized siblings.
      */
-    public void unmarshalSiblings(Marshaller marsh) throws IgniteCheckedException {
-        assert marsh != null;
-
-        if (siblingsBytes != null)
-            siblings = U.unmarshal(marsh, siblingsBytes, null);
+    public byte[] siblingsBytes() {
+        return siblingsBytes;
     }
 
-    /** {@inheritDoc} */
-    @Override public boolean writeTo(ByteBuffer buf, MessageWriter writer) {
-        writer.setBuffer(buf);
-
-        if (!writer.isHeaderWritten()) {
-            if (!writer.writeHeader(directType()))
-                return false;
-
-            writer.onHeaderWritten();
-        }
-
-        switch (writer.state()) {
-            case 0:
-                if (!writer.writeByteArray(siblingsBytes))
-                    return false;
-
-                writer.incrementState();
-
-        }
-
-        return true;
+    /**
+     * @param siblingsBytes Serialized siblings.
+     */
+    public void siblingsBytes(byte[] siblingsBytes) {
+        this.siblingsBytes = siblingsBytes;
     }
 
-    /** {@inheritDoc} */
-    @Override public boolean readFrom(ByteBuffer buf, MessageReader reader) {
-        reader.setBuffer(buf);
-
-        switch (reader.state()) {
-            case 0:
-                siblingsBytes = reader.readByteArray();
+    /**
+     * Marshals siblings to byte array.
+     *
+     * @param marsh Marshaller.
+     * @throws IgniteCheckedException In case of error.
+     */
+    public void marshalSiblings(Marshaller marsh) throws IgniteCheckedException {
+        siblingsBytes = U.marshal(marsh, siblings);
+    }
 
-                if (!reader.isLastRead())
-                    return false;
+    /**
+     * Unmarshals siblings from byte array.
+     *
+     * @param marsh Marshaller.
+     * @throws IgniteCheckedException In case of error.
+     */
+    public void unmarshalSiblings(Marshaller marsh) throws IgniteCheckedException {
+        assert marsh != null;
 
-                reader.incrementState();
+        if (siblingsBytes != null) {
+            siblings = U.unmarshal(marsh, siblingsBytes, null);
 
+            siblingsBytes = null;
         }
-
-        return true;
     }
 
     /** {@inheritDoc} */
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/managers/communication/GridIoMessageFactory.java b/modules/core/src/main/java/org/apache/ignite/internal/managers/communication/GridIoMessageFactory.java
index cf07a3fcfb8c0..c3804b5beaee2 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/managers/communication/GridIoMessageFactory.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/managers/communication/GridIoMessageFactory.java
@@ -78,6 +78,7 @@
 import org.apache.ignite.internal.codegen.GridJobCancelRequestSerializer;
 import org.apache.ignite.internal.codegen.GridJobExecuteResponseSerializer;
 import org.apache.ignite.internal.codegen.GridJobSiblingsRequestSerializer;
+import org.apache.ignite.internal.codegen.GridJobSiblingsResponseSerializer;
 import org.apache.ignite.internal.codegen.GridNearAtomicCheckUpdateRequestSerializer;
 import org.apache.ignite.internal.codegen.GridNearAtomicSingleUpdateFilterRequestSerializer;
 import org.apache.ignite.internal.codegen.GridNearAtomicSingleUpdateRequestSerializer;
@@ -313,7 +314,7 @@ public class GridIoMessageFactory implements MessageFactoryProvider {
         factory.register((short)1, GridJobExecuteRequest::new);
         factory.register((short)2, GridJobExecuteResponse::new, new GridJobExecuteResponseSerializer());
         factory.register((short)3, GridJobSiblingsRequest::new, new GridJobSiblingsRequestSerializer());
-        factory.register((short)4, GridJobSiblingsResponse::new);
+        factory.register((short)4, GridJobSiblingsResponse::new, new GridJobSiblingsResponseSerializer());
         factory.register((short)5, GridTaskCancelRequest::new, new GridTaskCancelRequestSerializer());
         factory.register((short)6, GridTaskSessionRequest::new, new GridTaskSessionRequestSerializer());
         factory.register((short)7, GridCheckpointRequest::new, new GridCheckpointRequestSerializer());
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/task/GridTaskProcessor.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/task/GridTaskProcessor.java
index b6411017fc9c4..54775dcb63a54 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/task/GridTaskProcessor.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/task/GridTaskProcessor.java
@@ -1412,11 +1412,12 @@ private class JobSiblingsMessageListener implements GridMessageListener {
 
                     boolean loc = ctx.localNodeId().equals(nodeId);
 
-                    ctx.io().sendToCustomTopic(nodeId, topic,
-                        new GridJobSiblingsResponse(
-                            loc ? siblings : null,
-                            loc ? null : U.marshal(marsh, siblings)),
-                        SYSTEM_POOL);
+                    GridJobSiblingsResponse resp = new GridJobSiblingsResponse(siblings);
+
+                    if (!loc)
+                        resp.marshalSiblings(marsh);
+
+                    ctx.io().sendToCustomTopic(nodeId, topic, resp, SYSTEM_POOL);
                 }
                 catch (IgniteCheckedException e) {
                     U.error(log, "Failed to send job sibling response.", e);