diff --git a/open_builded.bat b/open_builded.bat
new file mode 100644
index 00000000..7c4e9347
--- /dev/null
+++ b/open_builded.bat
@@ -0,0 +1 @@
+explorer C:\Users\dbnt\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\geoinfo_eGov_work
diff --git a/src/main/java/geoinfo/main/login/LoginController.java b/src/main/java/geoinfo/main/login/LoginController.java
index 6ddb3a85..d259d0a0 100644
--- a/src/main/java/geoinfo/main/login/LoginController.java
+++ b/src/main/java/geoinfo/main/login/LoginController.java
@@ -524,11 +524,21 @@ public class LoginController {
 
 		String userId = (String)request.getSession().getAttribute("USERID");
 
-		users.remove(userId, request.getSession());
-
-		RequestContextHolder.getRequestAttributes().removeAttribute(userId, RequestAttributes.SCOPE_SESSION);
-
-		request.getSession().invalidate();
+				
+		if( userId == null ) {
+			System.out.println(
+	            "\n--------------------------------------------------------------\n" +
+	            request.getRequestURI() + " " + " userId == null: 이미 로그아웃되어있음." +
+	            "\n--------------------------------------------------------------\n" +
+	            "userId:[" + "null" + "]\n" +             
+	            "\n--------------------------------------------------------------\n"
+	        );
+			mv.setViewName("/");
+		} else {
+			users.remove(userId, request.getSession());			
+			RequestContextHolder.getRequestAttributes().removeAttribute(userId, RequestAttributes.SCOPE_SESSION);
+			request.getSession().invalidate();			
+		}
 
 		return mv;
 	}
diff --git a/src/main/java/geoinfo/main/main/MainController.java b/src/main/java/geoinfo/main/main/MainController.java
index d2e1f31a..4354f442 100644
--- a/src/main/java/geoinfo/main/main/MainController.java
+++ b/src/main/java/geoinfo/main/main/MainController.java
@@ -968,8 +968,11 @@ public class MainController
 		} catch (SQLException e) {
 			System.out.println(e.getMessage());
 
-		    if (false && !e.getMessage().contains("Already closed")) {
-		        // "Already closed" 예외가 아닌 경우에만 처리
+		    if (true && e.getMessage().contains("Already closed")) {
+		    	System.out.println("Already closed");
+
+		    } else if (true && e.getMessage().contains("Socket read timed out")) {
+		    	System.out.println("데이터베이스 연결 시간 초과");
 
 		    }
 			throw e;
diff --git a/src/main/webapp/WEB-INF/lib/json-simple-1.1.1.jar b/src/main/webapp/WEB-INF/lib/json-simple-1.1.1.jar
new file mode 100644
index 00000000..dfd5856d
Binary files /dev/null and b/src/main/webapp/WEB-INF/lib/json-simple-1.1.1.jar differ