diff --git a/src/main/java/com/bsmlab/dfx/agent/listener/dto/AckDto.java b/src/main/java/com/bsmlab/dfx/agent/listener/dto/AckDto.java
index 8029f3b..3350d2c 100644
--- a/src/main/java/com/bsmlab/dfx/agent/listener/dto/AckDto.java
+++ b/src/main/java/com/bsmlab/dfx/agent/listener/dto/AckDto.java
@@ -2,6 +2,7 @@ package com.bsmlab.dfx.agent.listener.dto;
 
 import lombok.*;
 
+@ToString
 @Getter
 @Setter
 @Builder
diff --git a/src/main/java/com/bsmlab/dfx/agent/task/status/StatusCheckerSchedulerService.java b/src/main/java/com/bsmlab/dfx/agent/task/status/StatusCheckerSchedulerService.java
index bfbed6c..a6e2839 100644
--- a/src/main/java/com/bsmlab/dfx/agent/task/status/StatusCheckerSchedulerService.java
+++ b/src/main/java/com/bsmlab/dfx/agent/task/status/StatusCheckerSchedulerService.java
@@ -15,6 +15,7 @@ import org.springframework.http.MediaType;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 import org.springframework.scheduling.support.CronTrigger;
 import org.springframework.stereotype.Service;
+import org.springframework.web.client.ResourceAccessException;
 import org.springframework.web.client.RestTemplate;
 
 import java.util.List;
@@ -49,10 +50,11 @@ public class StatusCheckerSchedulerService {
                 RestTemplate restTemplate = new RestTemplate();
                 String url = "http://" + knownAgent.getHostName() + ":" + knownAgent.getListenPort() + "/command";
                 log.debug("StatusChecker to {} send a message UUID {}", knownAgent.getHostName(), messageUuid);
-                String response = restTemplate.postForObject(url, bodyEntity, String.class);
+                String response = "";
                 ObjectMapper objectMapper = new ObjectMapper();
                 AckDto ackDto = null;
                 try {
+                    response = restTemplate.postForObject(url, bodyEntity, String.class);
                     ackDto = objectMapper.readValue(response, new TypeReference<AckDto>() {});
                     log.debug("StatusChecker received ack from {} ack: {}", knownAgent.getHostName(), ackDto);
                     if(AckDto.ResultType.PROCESS_SUCCESS == ackDto.getResult()) {
@@ -65,10 +67,15 @@ public class StatusCheckerSchedulerService {
                         this.agentConfigReader.setKnownAgentStatus(knownAgent.getHostId(), "DOWN");
                         log.debug("known agent {} {} is DOWN", knownAgent.getHostId(), knownAgent.getHostName());
                     }
-                } catch (JsonProcessingException e) {
+                }
+                catch (JsonProcessingException e) {
                     this.agentConfigReader.setKnownAgentStatus(knownAgent.getHostId(), "DOWN");
                     log.debug("known agent {} {} alive message is not valid then set DOWN", knownAgent.getHostId(), knownAgent.getHostName());
                 }
+                catch (ResourceAccessException e) {
+                    this.agentConfigReader.setKnownAgentStatus(knownAgent.getHostId(), "DOWN");
+                    log.debug("known agent {} {} connection timeout", knownAgent.getHostId(), knownAgent.getHostName());
+                }
             }
         }
     }