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src/_VisualDVM/Passes/All/PingTestingServer.java

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+package _VisualDVM.Passes.All;
+import _VisualDVM.Repository.Server.ServerCode;
+import _VisualDVM.Repository.Server.ServerExchangeUnit_2021;
+import _VisualDVM.Passes.Server.TestingSystemPass;
+
+import java.net.ConnectException;
+public class PingTestingServer extends TestingSystemPass {
+    boolean flag;
+    boolean silent;
+    @Override
+    protected boolean canStart(Object... args) throws Exception {
+        flag = false;
+        silent = args.length > 0 ? (boolean) args[0] : false;
+        return super.canStart(args);
+    }
+    @Override
+    protected void ServerAction() throws Exception {
+        Command(new ServerExchangeUnit_2021(ServerCode.Ping));
+        flag = true;
+    }
+    @Override
+    protected boolean validate() {
+        return flag;
+    }
+    @Override
+    protected void CheckException(Exception ex) {
+        if (silent) {
+            Throwable cause = getCauseRec(ex);
+            if ((cause instanceof ConnectException) && cause.getMessage().contains("Connection refused: connect")) {
+                //так как это пинг, игнорируем.
+                return;
+            }
+        }
+        super.CheckException(ex);
+    }
+}