diff --git a/3rd/jemalloc b/3rd/jemalloc
index 896ed3a8..3541a904 160000
--- a/3rd/jemalloc
+++ b/3rd/jemalloc
@@ -1 +1 @@
-Subproject commit 896ed3a8b3f41998d4fb4d625d30ac63ef2d51fb
+Subproject commit 3541a904d6fb949f3f0aea05418ccce7cbd4b705
diff --git a/skynet-src/socket_server.c b/skynet-src/socket_server.c
index 2f373904..df9792d7 100644
--- a/skynet-src/socket_server.c
+++ b/skynet-src/socket_server.c
@@ -698,6 +698,8 @@ send_buffer_(struct socket_server *ss, struct socket *s, struct socket_lock *l,
 				raise_uncomplete(s);
 				return -1;
 			}
+			if (s->low.head)
+				return -1;
 		} 
 		// step 4
 		assert(send_buffer_empty(s) && s->wb_size == 0);