fix: if a watch closes and fails to reconnect, exit the operator

Author: secondsun

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/internal/CustomResourceEventSource.java

@@ -154,7 +154,12 @@ public void onClose(WatcherException e) {
     }
     if (e.isHttpGone()) {
       log.warn("Received error for watch, will try to reconnect.", e);
-      registerWatch();
+      try {
+        registerWatch();
+      } catch (Throwable ex) {
+          log.error("Unexpected error happened with watch. Will exit.", e);
+          System.exit(1);  
+      }
     } else {
       // Note that this should not happen normally, since fabric8 client handles reconnect.
       // In case it tries to reconnect this method is not called.