diff --git a/src/main/java/org/codelibs/fess/helper/CurlHelper.java b/src/main/java/org/codelibs/fess/helper/CurlHelper.java
index 8f336317d..3b65d9f8b 100644
--- a/src/main/java/org/codelibs/fess/helper/CurlHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/CurlHelper.java
@@ -75,7 +75,7 @@ public class CurlHelper {
 
         final String[] hosts = split(ResourceUtil.getFesenHttpUrl(), ",")
                 .get(stream -> stream.map(s -> s.trim()).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
-        nodeManager = new NodeManager(hosts, node -> get(node.getUrl("/")));
+        nodeManager = new NodeManager(hosts, node -> request(new CurlRequest(Method.GET, node.getUrl("/"))));
         nodeManager.setHeartbeatInterval(fessConfig.getElasticsearchHeartbeatIntervalAsInteger().longValue());
     }
 
@@ -96,7 +96,10 @@ public class CurlHelper {
     }
 
     public CurlRequest request(final Method method, final String path) {
-        final CurlRequest request = new FesenRequest(new CurlRequest(method, null), nodeManager, path);
+        return request(new FesenRequest(new CurlRequest(method, null), nodeManager, path));
+    }
+
+    protected CurlRequest request(final CurlRequest request) {
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         final String username = fessConfig.getElasticsearchUsername();
         final String password = fessConfig.getElasticsearchPassword();
diff --git a/src/main/java/org/codelibs/fess/util/ResourceUtil.java b/src/main/java/org/codelibs/fess/util/ResourceUtil.java
index 3764d0a6c..78e9bda46 100644
--- a/src/main/java/org/codelibs/fess/util/ResourceUtil.java
+++ b/src/main/java/org/codelibs/fess/util/ResourceUtil.java
@@ -43,7 +43,7 @@ public class ResourceUtil {
     }
 
     public static String getFesenHttpUrl() {
-        final String url = System.getProperty("fess.es.http_address");
+        final String url = System.getProperty(Constants.FESS_ES_HTTP_ADDRESS);
         if (url != null) {
             return url;
         }