do not update time in the timer signal handler,
since localtime_r() is not Async-Signal-Safe function

src/event/modules/ngx_devpoll_module.c

diff --git a/src/event/modules/ngx_devpoll_module.c b/src/event/modules/ngx_devpoll_module.c
index 3dd2230..f133b72 100644
--- a/src/event/modules/ngx_devpoll_module.c
+++ b/src/event/modules/ngx_devpoll_module.c
@@ -371,7 +371,7 @@
 
     err = (events == -1) ? ngx_errno : 0;
 
-    if (flags & NGX_UPDATE_TIME) {
+    if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
         ngx_time_update(0, 0);
     }
 

src/event/modules/ngx_epoll_module.c

diff --git a/src/event/modules/ngx_epoll_module.c b/src/event/modules/ngx_epoll_module.c
index dc5d422..3c1ca2a 100644
--- a/src/event/modules/ngx_epoll_module.c
+++ b/src/event/modules/ngx_epoll_module.c
@@ -531,7 +531,7 @@
 
     err = (events == -1) ? ngx_errno : 0;
 
-    if (flags & NGX_UPDATE_TIME) {
+    if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
         ngx_time_update(0, 0);
     }
 

src/event/modules/ngx_kqueue_module.c

diff --git a/src/event/modules/ngx_kqueue_module.c b/src/event/modules/ngx_kqueue_module.c
index 02230ca..b6dfa8f 100644
--- a/src/event/modules/ngx_kqueue_module.c
+++ b/src/event/modules/ngx_kqueue_module.c
@@ -537,7 +537,7 @@
 
     err = (events == -1) ? ngx_errno : 0;
 
-    if (flags & NGX_UPDATE_TIME) {
+    if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
         ngx_time_update(0, 0);
     }
 

src/event/modules/ngx_poll_module.c

diff --git a/src/event/modules/ngx_poll_module.c b/src/event/modules/ngx_poll_module.c
index 10098d6..3b98c19 100644
--- a/src/event/modules/ngx_poll_module.c
+++ b/src/event/modules/ngx_poll_module.c
@@ -262,7 +262,7 @@
 
     err = (ready == -1) ? ngx_errno : 0;
 
-    if (flags & NGX_UPDATE_TIME) {
+    if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
         ngx_time_update(0, 0);
     }
 

src/event/modules/ngx_select_module.c

diff --git a/src/event/modules/ngx_select_module.c b/src/event/modules/ngx_select_module.c
index e76da5b..9f5b43b 100644
--- a/src/event/modules/ngx_select_module.c
+++ b/src/event/modules/ngx_select_module.c
@@ -262,7 +262,7 @@
 
     err = (ready == -1) ? ngx_errno : 0;
 
-    if (flags & NGX_UPDATE_TIME) {
+    if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
         ngx_time_update(0, 0);
     }
 

src/event/ngx_event.c

diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index 9c13eac..3922b0e 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -562,8 +562,6 @@
 {
     ngx_event_timer_alarm = 1;
 
-    ngx_time_update(0, 0);
-
 #if 1
     ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal");
 #endif