diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/DynamicCacheChangeRequest.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/DynamicCacheChangeRequest.java
index a3116ad98772c..1e5ab8823be75 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/DynamicCacheChangeRequest.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/DynamicCacheChangeRequest.java
@@ -35,7 +35,7 @@ public class DynamicCacheChangeRequest implements Serializable {
     private static final long serialVersionUID = 0L;
 
     /** */
-    private UUID requestId;
+    private UUID reqId;
 
     /** Start ID. */
     private IgniteUuid deploymentId;
@@ -95,8 +95,8 @@ public class DynamicCacheChangeRequest implements Serializable {
      * @param cacheName Cache stop name.
      * @param initiatingNodeId Initiating node ID.
      */
-    public DynamicCacheChangeRequest(UUID requestId, String cacheName, UUID initiatingNodeId) {
-        this.requestId = requestId;
+    public DynamicCacheChangeRequest(UUID reqId, String cacheName, UUID initiatingNodeId) {
+        this.reqId = reqId;
         this.cacheName = cacheName;
         this.initiatingNodeId = initiatingNodeId;
     }
@@ -105,7 +105,7 @@ public DynamicCacheChangeRequest(UUID requestId, String cacheName, UUID initiati
      * @return Request ID.
      */
     public UUID requestId() {
-        return requestId;
+        return reqId;
     }
 
     /**
diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java
index 1e5fcc1dfe8a2..7f4fb99f60e31 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java
@@ -2041,8 +2041,9 @@ private GridCacheSharedContext createSharedContext(GridKernalContext kernalCtx,
 
                 if (desc == null)
                     continue;
-
-                DynamicCacheChangeRequest req = new DynamicCacheChangeRequest(UUID.randomUUID(), cache.name(), null);
+                // requestId must be null because on different node will be different byte [] and we get duplicate discovery data
+                // see TcpDiscoveryNodeAddedMessage#addDiscoveryData 'Arrays.equals(curData, discoDataEntry.getValue())'
+                DynamicCacheChangeRequest req = new DynamicCacheChangeRequest(null, cache.name(), null);
 
                 req.startCacheConfiguration(desc.cacheConfiguration());
 
@@ -2068,7 +2069,7 @@ private GridCacheSharedContext createSharedContext(GridKernalContext kernalCtx,
 
             for (DynamicCacheDescriptor desc : registeredCaches.values()) {
                 DynamicCacheChangeRequest req = new DynamicCacheChangeRequest(
-                    UUID.randomUUID(), desc.cacheConfiguration().getName(), null);
+                    null, desc.cacheConfiguration().getName(), null);
 
                 req.startCacheConfiguration(desc.cacheConfiguration());
 
@@ -2083,7 +2084,7 @@ private GridCacheSharedContext createSharedContext(GridKernalContext kernalCtx,
 
             for (DynamicCacheDescriptor desc : registeredTemplates.values()) {
                 DynamicCacheChangeRequest req = new DynamicCacheChangeRequest(
-                    UUID.randomUUID(), desc.cacheConfiguration().getName(), null);
+                    null, desc.cacheConfiguration().getName(), null);
 
                 req.startCacheConfiguration(desc.cacheConfiguration());
 
diff --git a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
index 44159c6b0fd8e..585c153823f74 100644
--- a/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
+++ b/modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java
@@ -18,7 +18,6 @@
 package org.apache.ignite.spi.discovery.tcp;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.ObjectStreamException;