adding missing reconnect from a recent change to the httpwatch logic

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/internal/WatchHTTPManager.java

@@ -71,6 +71,7 @@ protected synchronized void start(URL url, Map<String, String> headers) {
     call.whenComplete((response, t) -> {
       if (!call.isCancelled() && t != null) {
         logger.info("Watch connection failed. reason: {}", t.getMessage());
+        scheduleReconnect();
       }
       if (response != null) {
         AsyncBody body = response.body();

kubernetes-client/src/test/java/io/fabric8/kubernetes/client/dsl/internal/WatchHttpManagerTest.java

@@ -0,0 +1,65 @@
+/**
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fabric8.kubernetes.client.dsl.internal;
+
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.KubernetesResourceList;
+import io.fabric8.kubernetes.api.model.ListOptions;
+import io.fabric8.kubernetes.client.Watcher;
+import io.fabric8.kubernetes.client.http.HttpClient;
+import io.fabric8.kubernetes.client.http.HttpClient.AsyncBody;
+import io.fabric8.kubernetes.client.http.HttpClient.DerivedClientBuilder;
+import io.fabric8.kubernetes.client.http.HttpResponse;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class WatchHttpManagerTest {
+
+  @Test
+  void testReconnectOnException() throws MalformedURLException, InterruptedException {
+    HttpClient client = Mockito.mock(HttpClient.class, Mockito.RETURNS_DEEP_STUBS);
+    DerivedClientBuilder builder = Mockito.mock(HttpClient.DerivedClientBuilder.class, Mockito.RETURNS_SELF);
+    Mockito.when(client.newBuilder()).thenReturn(builder);
+    Mockito.when(builder.build()).thenReturn(client);
+    BaseOperation baseOperation = Mockito.mock(BaseOperation.class);
+    Mockito.when(baseOperation.getNamespacedUrl()).thenReturn(new URL("http://localhost"));
+    CompletableFuture<HttpResponse<AsyncBody>> future = new CompletableFuture<>();
+    Mockito.when(client.consumeLines(Mockito.any(), Mockito.any())).thenReturn(future);
+
+    CountDownLatch reconnect = new CountDownLatch(1);
+    WatchHTTPManager<HasMetadata, KubernetesResourceList<HasMetadata>> watch = new WatchHTTPManager(client,
+        baseOperation, Mockito.mock(ListOptions.class), Mockito.mock(Watcher.class), 1, 0) {
+      @Override
+      void scheduleReconnect() {
+        reconnect.countDown();
+      }
+    };
+
+    future.completeExceptionally(new IOException());
+    assertTrue(reconnect.await(1, TimeUnit.SECONDS));
+  }
+
+}