diff --git a/examples/src/bussiness.c b/examples/src/bussiness.c
index 46c99fe2699aff1a34ffdb1429d724480598eccd..9c5f8c276826318824bf94abe5f40e1f44f8b9dd 100644
--- a/examples/src/bussiness.c
+++ b/examples/src/bussiness.c
@@ -203,7 +203,7 @@ static int32_t server_ans_write(int32_t socket_fd, struct ServerBaseCfgInfo *ser
         if (nwrite == 0) {
             return PROGRAM_ABORT;
         } else if (nwrite < 0) {
-            if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) {
+            if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN && errno != ENOBUFS) {
                 PRINT_ERROR("nwrite =%d, errno=%d", nwrite, errno);
                 return PROGRAM_FAULT;
             }
@@ -328,7 +328,7 @@ int32_t client_ask(struct ClientHandler *client_handler, struct ClientUnit *clie
         if (nwrite == 0) {
             return PROGRAM_ABORT;
         } else if (nwrite < 0) {
-             if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) {
+             if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN && errno != ENOBUFS) {
                 return PROGRAM_FAULT;
              }
         } else {
diff --git a/src/lstack/core/lstack_lwip.c b/src/lstack/core/lstack_lwip.c
index bb261d269874c6e50a8746ab6f509f8e5218e5a0..1a6f9b21f5b9b81a5c517200517c07ffacd87082 100644
--- a/src/lstack/core/lstack_lwip.c
+++ b/src/lstack/core/lstack_lwip.c
@@ -525,7 +525,7 @@ static ssize_t do_lwip_udp_fill_sendring(struct lwip_sock *sock, const void *buf
     if (write_avail < write_num) {
         LSTACK_LOG(WARNING, LSTACK, "sock send_ring is already exhausted.\n");
         sem_timedwait_nsecs(&sock->snd_ring_sem);
-        GAZELLE_RETURN(ENOMEM);
+        GAZELLE_RETURN(ENOBUFS);
     }
 
     send_len = app_buff_write(sock, (char *)buf, len, write_num, addr, addrlen);