fix ESClientMgr logger

@@ -46,7 +46,7 @@ public class ESClientMgr {
 			String servers = configer.getSearchEsServers();
 			Assert.notNull(clusterName, "ClusterName for ES cannot be null.");
 			Assert.notNull(servers, "Servers for ES cannot be null.");
-			logger.warn("begin to createIndexClient, clusterName is [{}],servers is [{}],name is[{}]", clusterName, servers, name);
+			logger.error("begin to createIndexClient, clusterName is [{}],servers is [{}],name is[{}]", clusterName, servers, name);
 			return factory.createIndexClient(clusterName, servers, name);
 		});
 	}