diff --git a/lib_acl/src/stdlib/iostuff/acl_read_wait.c b/lib_acl/src/stdlib/iostuff/acl_read_wait.c
index 9b0e66a5d..dc168e45f 100644
--- a/lib_acl/src/stdlib/iostuff/acl_read_wait.c
+++ b/lib_acl/src/stdlib/iostuff/acl_read_wait.c
@@ -339,9 +339,11 @@ int acl_read_poll_wait(ACL_SOCKET fd, int delay)
 			if (acl_last_error() == ACL_EINTR) {
 				break;
 			}
+			/*
 			acl_msg_error("%s(%d), %s: poll error(%s), fd: %d",
 				__FILE__, __LINE__, myname,
 				acl_last_serror(), (int) fd);
+			*/
 			return -1;
 		case 0:
 			/*
diff --git a/lib_acl_cpp/src/http/websocket.cpp b/lib_acl_cpp/src/http/websocket.cpp
index c533933da..fd532d5ea 100644
--- a/lib_acl_cpp/src/http/websocket.cpp
+++ b/lib_acl_cpp/src/http/websocket.cpp
@@ -409,8 +409,8 @@ bool websocket::read_frame_head(void)
 
 	if (client_.read(buf, 2) == -1) {
 		if (last_error() != ACL_ETIMEDOUT) {
-			logger_error("read first two char error: %d, %s",
-				last_error(), last_serror());
+			//logger_error("read first two char error: %d, %s",
+			//	last_error(), last_serror());
 		}
 		return false;
 	}
diff --git a/lib_acl_cpp/src/redis/redis_command.cpp b/lib_acl_cpp/src/redis/redis_command.cpp
index b1818d00c..d5ffea731 100644
--- a/lib_acl_cpp/src/redis/redis_command.cpp
+++ b/lib_acl_cpp/src/redis/redis_command.cpp
@@ -39,7 +39,9 @@ void redis_command::init(void)
 	result_         = NULL;
 	pipe_msg_       = NULL;
 	addr_[0]        = 0;
-	dbuf_           = new dbuf_pool();
+
+#define	REDIS_DBUF_NBLOCK	1
+	dbuf_           = new (REDIS_DBUF_NBLOCK) dbuf_pool();
 }
 
 redis_command::redis_command(void)
diff --git a/lib_acl_cpp/src/stdlib/json.cpp b/lib_acl_cpp/src/stdlib/json.cpp
index 1149528b4..1bc886af5 100644
--- a/lib_acl_cpp/src/stdlib/json.cpp
+++ b/lib_acl_cpp/src/stdlib/json.cpp
@@ -448,7 +448,8 @@ json::json(const char* data /* NULL */, dbuf_guard* dbuf /* NULL */)
 	if (dbuf) {
 		dbuf_ = dbuf;
 	} else {
-		dbuf_ = dbuf_internal_ = NEW dbuf_guard;
+#define	JSON_DBUF_NBLOCK	1
+		dbuf_ = dbuf_internal_ = NEW dbuf_guard(JSON_DBUF_NBLOCK);
 	}
 
 	json_ = acl_json_dbuf_alloc(dbuf_->get_dbuf().get_dbuf());