diff --git a/src/main/java/com/bsmlab/dfx/agent/config/AgentConfigDto.java b/src/main/java/com/bsmlab/dfx/agent/config/AgentConfigDto.java
index 859afa1..7248aa0 100644
--- a/src/main/java/com/bsmlab/dfx/agent/config/AgentConfigDto.java
+++ b/src/main/java/com/bsmlab/dfx/agent/config/AgentConfigDto.java
@@ -60,6 +60,7 @@ public class AgentConfigDto {
         private String dataSourceId;
         private String sqlId;
         private String saveDirectoryRoot;
+        private String description;
     }
 
     @Data
@@ -77,6 +78,7 @@ public class AgentConfigDto {
         private String recipientHostId;
         private String recipientDropBoxId;
         private List<String> routingHostIdList;
+        private String description;
     }
 
     @Data
diff --git a/src/main/java/com/bsmlab/dfx/agent/task/postman/PostmanSchedulerService.java b/src/main/java/com/bsmlab/dfx/agent/task/postman/PostmanSchedulerService.java
index 77f81b5..b0d8fbd 100644
--- a/src/main/java/com/bsmlab/dfx/agent/task/postman/PostmanSchedulerService.java
+++ b/src/main/java/com/bsmlab/dfx/agent/task/postman/PostmanSchedulerService.java
@@ -83,27 +83,29 @@ public class PostmanSchedulerService {
                 String response = null;
                 try {
                     List<Map<String, Object>> dataMapList = sqlExecuteService.select(dataSourceId, sqlId, null);
-                    String dataString = objectMapper.writeValueAsString(dataMapList);
-                    ReceiveMessageDto receiveMessageDto = ReceiveMessageDto.builder().senderHostId(senderHostId).senderTimestamp(senderTimestamp)
-                            .messageUuid(messageUuid).messageType(AgentConfigDto.MessageType.TRANSFER_DB_TO_DB)
-                            .recipientHostId(postman.getRecipientHostId()).recipientDropBoxId(postman.getRecipientDropBoxId())
-                            .data(dataString).build();
-                    HttpHeaders httpHeaders = new HttpHeaders();
-                    httpHeaders.setContentType(MediaType.APPLICATION_JSON);
-                    HttpEntity<ReceiveMessageDto> bodyEntity = new HttpEntity<>(receiveMessageDto, httpHeaders);
-                    RestTemplate restTemplate = new RestTemplate();
-                    String url = "http://" + knownAgent.getHostName() + ":" + knownAgent.getListenPort() + "/listen";
-                    log.debug("postman to {} send a message UUID {}", receiveMessageDto.getRecipientHostId(), receiveMessageDto.getMessageUuid());
-                    response = restTemplate.postForObject(url, bodyEntity, String.class);
-                    AckDto ackDto = objectMapper.readValue(response, new TypeReference<AckDto>() {});
-                    log.debug("postman received ack from {} ack: {}", receiveMessageDto.getRecipientHostId(), ackDto);
-                    if(AckDto.ResultType.RECEIVE_SUCCESS != ackDto.getResult()) {
-                        log.warn("대상 agent {}[{}]에게 전송하였으나 상대방이 수신하지 못하였습니다. 응답: {} 응답메시지: {}"
-                                , knownAgent.getHostId(), knownAgent.getHostName(), ackDto.getResult(), ackDto.getResultText());
-                    }
-                    else {
-                        String postProcessingSqlId = postman.getMessage().getPostProcessingSqlId();
-                        sqlExecuteService.update(dataSourceId, postProcessingSqlId, new HashMap<String, Object>());
+                    if(dataMapList != null && !dataMapList.isEmpty()) {
+                        String dataString = objectMapper.writeValueAsString(dataMapList);
+                        ReceiveMessageDto receiveMessageDto = ReceiveMessageDto.builder().senderHostId(senderHostId).senderTimestamp(senderTimestamp)
+                                .messageUuid(messageUuid).messageType(AgentConfigDto.MessageType.TRANSFER_DB_TO_DB)
+                                .recipientHostId(postman.getRecipientHostId()).recipientDropBoxId(postman.getRecipientDropBoxId())
+                                .data(dataString).build();
+                        HttpHeaders httpHeaders = new HttpHeaders();
+                        httpHeaders.setContentType(MediaType.APPLICATION_JSON);
+                        HttpEntity<ReceiveMessageDto> bodyEntity = new HttpEntity<>(receiveMessageDto, httpHeaders);
+                        RestTemplate restTemplate = new RestTemplate();
+                        String url = "http://" + knownAgent.getHostName() + ":" + knownAgent.getListenPort() + "/listen";
+                        log.debug("postman to {} send a message UUID {}", receiveMessageDto.getRecipientHostId(), receiveMessageDto.getMessageUuid());
+                        response = restTemplate.postForObject(url, bodyEntity, String.class);
+                        AckDto ackDto = objectMapper.readValue(response, new TypeReference<AckDto>() {});
+                        log.debug("postman received ack from {} ack: {}", receiveMessageDto.getRecipientHostId(), ackDto);
+                        if(AckDto.ResultType.RECEIVE_SUCCESS != ackDto.getResult()) {
+                            log.warn("대상 agent {}[{}]에게 전송하였으나 상대방이 수신하지 못하였습니다. 응답: {} 응답메시지: {}"
+                                    , knownAgent.getHostId(), knownAgent.getHostName(), ackDto.getResult(), ackDto.getResultText());
+                        }
+                        else {
+                            String postProcessingSqlId = postman.getMessage().getPostProcessingSqlId();
+                            sqlExecuteService.update(dataSourceId, postProcessingSqlId, new HashMap<String, Object>());
+                        }
                     }
                 }
                 catch (JsonProcessingException e) {