fix

Author: Vladsz83

modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java

@@ -7581,7 +7581,7 @@ private void processClientMetricsUpdateMessage(TcpDiscoveryClientMetricsUpdateMe
             ClientMessageWorker wrk = clientMsgWorkers.get(msg.creatorNodeId());
 
             if (wrk != null)
-                wrk.metrics(new ClusterMetricsSnapshot());
+                wrk.metrics(new ClusterMetricsSnapshot(msg.metricsMessage()));
             else if (log.isDebugEnabled())
                 log.debug("Received client metrics update message from unknown client node: " + msg);
         }

modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/TcpDiscoveryIoSession.java

@@ -170,6 +170,8 @@ <T> T readMessage() throws IgniteCheckedException, IOException {
             if (MESSAGE_SERIALIZATION != serMode) {
                 detectSslAlert(serMode, in);
 
+                // IOException type is important for ServerImpl for connection error processing behavior.
+                // It may search the cause (X.hasCause).
                 throw new IOException("Received unexpected byte while reading discovery message: " + serMode);
             }