diff --git a/qtfs/qtfs_common/user_engine.c b/qtfs/qtfs_common/user_engine.c
index 8ecbdcb41951c8bc5705fb8a26425190c7f8ac50..5a619fb7cd0ae0fb19e7cef7da4276b124fb556c 100644
--- a/qtfs/qtfs_common/user_engine.c
+++ b/qtfs/qtfs_common/user_engine.c
@@ -85,6 +85,8 @@ struct engine_arg {
 #define ENGINE_LOCK_ADDR "/var/run/qtfs/engine.lock"
 #define ENGINE_LOCK_FILE_DIR "/var/run/qtfs/"
 
+static volatile sig_atomic_t sig_int_flag = 0;
+
 static int engine_env_prepare()
 {
 	DIR *dir;
@@ -173,6 +175,18 @@ static void *qtfs_engine_kthread(void *arg)
 			engine_out("qtfs server thread:%d exit.", parg->thread_idx);
 			break;
 		}
+		if (sig_int_flag == 1) {
+			engine_out("qtfs engine recv SIGINT.");
+
+			if (qtfs_fd < 0) {
+				engine_err("qtfs engine signal int file:%s open failed, fd:%d.", QTFS_SERVER_FILE, qtfs_fd);
+				continue;
+			}
+			ret = ioctl(qtfs_fd, QTFS_IOCTL_EXIT, 0);
+			engine_out("qtfs engine send QTFS_IOCTL_EXIT to kernel, get return value:%d.", ret);
+			engine_run = 0;
+            break;
+		}
 		if (ret != QTOK) {
 			usleep(1000);
 		}
@@ -185,16 +199,7 @@ end:
 
 static void qtfs_signal_int(int signum)
 {
-	engine_out("qtfs engine recv signal number:%d.", signum);
-
-	if (qtfs_fd < 0) {
-		engine_err("qtfs engine signal int file:%s open failed, fd:%d.", QTFS_SERVER_FILE, qtfs_fd);
-		return;
-	}
-	long ret = ioctl(qtfs_fd, QTFS_IOCTL_EXIT, 0);
-	engine_out("qtfs engine send QTFS_IOCTL_EXIT to kernel, get return value:%d.", ret);
-	engine_run = 0;
-
+	sig_int_flag = 1;
 	return;
 }
 
diff --git a/qtfs/rexec/rexec_server.c b/qtfs/rexec/rexec_server.c
index 0c4b3c193398136716c37e1b11a9e1371a6e6501..bd104143b24e3d6e60fad369c831c5f8ffb8b6d5 100644
--- a/qtfs/rexec/rexec_server.c
+++ b/qtfs/rexec/rexec_server.c
@@ -42,6 +42,7 @@
 static int main_epoll_fd = -1;
 FILE *rexec_logfile = NULL;
 static GHashTable *child_hash = NULL;
+static volatile sig_atomic_t sig_chld_flag = 0;
 
 #define REXEC_WHITELIST_MAX_ITEMS 256
 struct rexec_white_list_str {
@@ -251,7 +252,7 @@ static int rexec_whitelist_check(char *binary)
 }
 
 #define IS_VALID_FD(fd) (fd > STDERR_FILENO)
-static void rexec_server_sig_chld(int num)
+static void handle_sig_chld(void)
 {
     int status;
     pid_t pid;
@@ -276,6 +277,12 @@ static void rexec_server_sig_chld(int num)
     return;
 }
 
+static void rexec_server_sig_chld(int num)
+{
+    sig_chld_flag = 1;
+    return;
+}
+
 static void rexec_server_sig_pipe(int signum)
 {
     return;
@@ -493,6 +500,10 @@ static void rexec_server_mainloop()
         goto end;
     }
     while (1) {
+        if (sig_chld_flag == 1) {
+            handle_sig_chld();
+            sig_chld_flag = 0;
+        }
         int n = epoll_wait(main_epoll_fd, evts, REXEC_MAX_EVENTS, 1000);
         if (n == 0)
             continue;