diff --git a/lib_acl/changes.txt b/lib_acl/changes.txt
index 6b2a3982e..7bbbcfd14 100644
--- a/lib_acl/changes.txt
+++ b/lib_acl/changes.txt
@@ -1,6 +1,10 @@
 修改历史列表：
 
 ------------------------------------------------------------------------
+623) 2018.2.3
+623.1) bugfix: acl_read_wait.c/acl_write_wait.c 调用 poll API 时，
+POLLHUP | POLLERR 不应做为输入参数
+
 622) 2018.1.30
 622.1) event: 为避免出现 core 文件太大将磁盘占满，现在当事件引擎报错时不再 core，
 而是记录错误日志后调用 exit(1) 退出进程
diff --git a/lib_acl/src/stdlib/iostuff/acl_peekfd.c b/lib_acl/src/stdlib/iostuff/acl_peekfd.c
index f326b8ab5..2185a9703 100644
--- a/lib_acl/src/stdlib/iostuff/acl_peekfd.c
+++ b/lib_acl/src/stdlib/iostuff/acl_peekfd.c
@@ -39,6 +39,7 @@ int acl_peekfd(ACL_SOCKET fd)
 #ifdef ACL_UNIX
 	return (ioctl(fd, FIONREAD, (char *) &count) < 0 ? -1 : count);
 #elif defined(ACL_WINDOWS)
-	return (ioctlsocket(fd, FIONREAD, (unsigned long *) &count) < 0 ? -1 : count);
+	return (ioctlsocket(fd, FIONREAD, (unsigned long *) &count) < 0
+		? -1 : count);
 #endif
 }
diff --git a/lib_acl/src/stdlib/iostuff/acl_read_wait.c b/lib_acl/src/stdlib/iostuff/acl_read_wait.c
index b732ff7d4..dbff0a3b4 100644
--- a/lib_acl/src/stdlib/iostuff/acl_read_wait.c
+++ b/lib_acl/src/stdlib/iostuff/acl_read_wait.c
@@ -253,18 +253,26 @@ static acl_poll_fn __sys_poll = WSAPoll;
 static acl_poll_fn __sys_poll = poll;
 # endif
 
-void acl_set_poll(acl_poll_fn fn)
+/* xxx: defined in acl_write_wait.c */
+extern void set_poll4write(acl_poll_fn fn);
+
+static void set_poll4read(acl_poll_fn fn)
 {
 	__sys_poll = fn;
 }
 
+void acl_set_poll(acl_poll_fn fn)
+{
+	set_poll4read(fn);
+}
+
 int acl_read_poll_wait(ACL_SOCKET fd, int delay)
 {
 	const char *myname = "acl_read_poll_wait";
 	struct pollfd fds;
 	time_t begin;
 
-	fds.events = POLLIN | POLLHUP | POLLERR;
+	fds.events = POLLIN;
 	fds.fd = fd;
 
 	acl_set_error(0);
@@ -273,7 +281,11 @@ int acl_read_poll_wait(ACL_SOCKET fd, int delay)
 		time(&begin);
 
 		switch (__sys_poll(&fds, 1, delay)) {
+#ifdef ACL_WINDOWS
+		case SOCKET_ERROR:
+#else
 		case -1:
+#endif
 			if (acl_last_error() == ACL_EINTR)
 				continue;
 
@@ -293,14 +305,7 @@ int acl_read_poll_wait(ACL_SOCKET fd, int delay)
 		default:
 			if ((fds.revents & POLLIN))
 				return 0;
-			else if (fds.revents & (POLLHUP | POLLERR)) {
-				acl_msg_warn("%s(%d), %s: poll error: %s, "
-					"fd: %d, delay: %d, spent: %ld",
-					__FILE__, __LINE__, myname,
-					acl_last_serror(), fd, delay,
-					(long) (time(NULL) - begin));
-				return -1;
-			} else {
+			if (fds.revents & (POLLHUP | POLLERR | POLLNVAL)) {
 				acl_msg_warn("%s(%d), %s: poll error: %s, "
 					"fd: %d, delay: %d, spent: %ld",
 					__FILE__, __LINE__, myname,
@@ -308,6 +313,11 @@ int acl_read_poll_wait(ACL_SOCKET fd, int delay)
 					(long) (time(NULL) - begin));
 				return -1;
 			}
+			acl_msg_warn("%s(%d), %s: poll error: %s, fd: %d, "
+				"delay: %d, spent: %ld", __FILE__, __LINE__,
+				myname, acl_last_serror(), fd, delay,
+				(long) (time(NULL) - begin));
+			return -1;
 		}
 	}
 }
diff --git a/lib_acl/src/stdlib/iostuff/acl_write_wait.c b/lib_acl/src/stdlib/iostuff/acl_write_wait.c
index dd479e4d8..321d7ad20 100644
--- a/lib_acl/src/stdlib/iostuff/acl_write_wait.c
+++ b/lib_acl/src/stdlib/iostuff/acl_write_wait.c
@@ -23,7 +23,20 @@
 #include "stdlib/acl_iostuff.h"
 #include "../../init/init.h"
 
-#ifdef ACL_UNIX
+#if defined(ACL_HAS_POLL)
+
+# if defined(ACL_WINDOWS)
+static acl_poll_fn __sys_poll = WSAPoll;
+# else
+static acl_poll_fn __sys_poll = poll;
+# endif
+
+extern void set_poll4write(acl_poll_fn fn);
+
+void set_poll4write(acl_poll_fn fn)
+{
+	__sys_poll = fn;
+}
 
 int acl_write_wait(ACL_SOCKET fd, int timeout)
 {
@@ -31,16 +44,16 @@ int acl_write_wait(ACL_SOCKET fd, int timeout)
 	struct pollfd fds;
 	int   delay = timeout * 1000;
 
-	fds.events = POLLOUT | POLLHUP | POLLERR;
+	fds.events = POLLOUT /* | POLLHUP | POLLERR; */;
 	fds.fd = fd;
 
-#if 0
-	acl_set_error(0);
-#endif
-
 	for (;;) {
-		switch (poll(&fds, 1, delay)) {
+		switch (__sys_poll(&fds, 1, delay)) {
+#ifdef ACL_WINDOWS
+		case SOCKET_ERROR:
+#else
 		case -1:
+#endif
 			if (acl_last_error() == ACL_EINTR)
 				continue;
 			acl_msg_error("%s(%d), %s: poll error(%s), fd: %d",
@@ -51,7 +64,7 @@ int acl_write_wait(ACL_SOCKET fd, int timeout)
 			acl_set_error(ACL_ETIMEDOUT);
 			return -1;
 		default:
-			if ((fds.revents & (POLLHUP | POLLERR))) {
+			if ((fds.revents & (POLLHUP | POLLERR | POLLNVAL))) {
 				/*
 				acl_msg_error("%s(%d), %s: fd: %d,"
 					"POLLHUP: %s, POLLERR: %s",
@@ -110,10 +123,6 @@ int acl_write_wait(ACL_SOCKET fd, int timeout)
 	} else
 		tp = 0;
 
-#if 0
-	acl_set_error(0);
-#endif
-
 	for (;;) {
 #ifdef ACL_WINDOWS
 		switch (select(1, (fd_set *) 0, &wfds, &xfds, tp)) {
diff --git a/lib_acl_cpp/samples/redis/redis/redis.cpp b/lib_acl_cpp/samples/redis/redis/redis.cpp
index 6b40ad609..09a7a024f 100644
--- a/lib_acl_cpp/samples/redis/redis/redis.cpp
+++ b/lib_acl_cpp/samples/redis/redis/redis.cpp
@@ -160,6 +160,7 @@ static void usage(const char* procname)
 {
 	printf("usage: %s -h[help]\r\n"
 		"-s redis_addr[127.0.0.1:6379]\r\n"
+		"-p password[default: \"\"]\r\n"
 		"-n count\r\n"
 		"-C connect_timeout[default: 10]\r\n"
 		"-T rw_timeout[default: 10]\r\n"
@@ -170,9 +171,9 @@ static void usage(const char* procname)
 int main(int argc, char* argv[])
 {
 	int  ch, n = 1, conn_timeout = 10, rw_timeout = 10;
-	acl::string addr("127.0.0.1:6379"), command;
+	acl::string addr("127.0.0.1:6379"), command, passwd;
 
-	while ((ch = getopt(argc, argv, "hs:n:C:T:a:")) > 0)
+	while ((ch = getopt(argc, argv, "hs:n:C:T:a:p:")) > 0)
 	{
 		switch (ch)
 		{
@@ -194,6 +195,9 @@ int main(int argc, char* argv[])
 		case 'a':
 			command = optarg;
 			break;
+		case 'p':
+			passwd = optarg;
+			break;
 		default:
 			break;
 		}
@@ -202,6 +206,7 @@ int main(int argc, char* argv[])
 	acl::acl_cpp_init();
 	acl::log::stdout_open(true);
 	acl::redis_client client(addr.c_str(), conn_timeout, rw_timeout);
+	client.set_password(passwd);
 	acl::redis cmd(&client);
 
 	bool ret;
diff --git a/lib_fiber/c/src/event/event_poll.c b/lib_fiber/c/src/event/event_poll.c
index 4c0a3dc66..10a94ef3c 100644
--- a/lib_fiber/c/src/event/event_poll.c
+++ b/lib_fiber/c/src/event/event_poll.c
@@ -171,7 +171,11 @@ static int poll_wait(EVENT *ev, int timeout)
 	}
 #endif
 	n = __sys_poll(ep->pfds, ep->count, timeout);
-	if (n < 0) {
+#ifdef SYS_WIN
+	if (n == SOCKET_ERROR) {
+#else
+	if (n == -1) {
+#endif
 		if (errno == EINTR) {
 			return 0;
 		}