diff --git a/qtfs/config/rexec/whitelist b/qtfs/config/rexec/whitelist
index b7f34b553f680335d5f2a268f457237e0419c70f..6a959d659bb10a04aed55d7c1cec8d1023ed88a1 100644
--- a/qtfs/config/rexec/whitelist
+++ b/qtfs/config/rexec/whitelist
@@ -1 +1 @@
-/usr/bin/qemu-kvm
+/usr/bin/qemu-kvm
diff --git a/qtfs/ipc/uds_main.c b/qtfs/ipc/uds_main.c
index 65468b8dbdf2a8cde11558ebee4a3195e0c674f4..4bc01a9cfbb6057a7ca9168e2b6de3d51f3eb904 100644
--- a/qtfs/ipc/uds_main.c
+++ b/qtfs/ipc/uds_main.c
@@ -255,6 +255,8 @@ int uds_set_nonblock(int fd)
 int uds_build_tcp_connection(struct uds_conn_arg *arg)
 {
 	int family = AF_VSOCK;
+	int retry = 3;
+	int ret = 0;
 	if (arg->cs > UDS_SOCKET_SERVER) {
 		uds_err("cs type %d is error.", arg->cs);
 		return -1;
@@ -305,7 +307,10 @@ int uds_build_tcp_connection(struct uds_conn_arg *arg)
 		sock_addr.svm_port = p_uds_var->vsock.peerport;
 		sock_addr.svm_cid = p_uds_var->vsock.peercid;
 #endif	
-		if (connect(arg->sockfd, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) < 0) {
+		do {
+			ret = connect(arg->sockfd, (struct sockaddr *)&sock_addr, sizeof(sock_addr));
+		} while ((ret != 0) && (retry--));
+		if (ret < 0) {
 			goto close_and_return;
 		}
 		arg->connfd = sock_fd;
diff --git a/qtfs/rexec/rexec_sock.c b/qtfs/rexec/rexec_sock.c
index e8750c51eb0d102d5913305bfe6b3459abb84b8a..f7495e50e34fdd0ba75326467e37e73d5d46c5a3 100644
--- a/qtfs/rexec/rexec_sock.c
+++ b/qtfs/rexec/rexec_sock.c
@@ -37,7 +37,7 @@
 
 int rexec_build_unix_connection(struct rexec_conn_arg *arg)
 {
-	const int sock_max_conn = 5;
+	const int sock_max_conn = 32;
 	if (arg->cs > REXEC_SOCK_SERVER) {
 		rexec_err("cs type %d is error.", arg->cs);
 		return -1;