--- a/src/event/ngx_event_close.c
+++ b/src/event/ngx_event_close.c
@@ -13,15 +13,20 @@ int ngx_event_close_connection(ngx_event
     int rc;
     ngx_connection_t *c = (ngx_connection_t *) ev->data;
 
-    ngx_log_debug(c->log, "CLOSE: %d" _ c->fd);
+    ngx_log_debug(c->log, "close connection: %d" _ c->fd);
 
     ngx_assert((c->fd != -1), return NGX_ERROR, c->log,
                "ngx_event_close: already closed");
 
-    ngx_destroy_pool(c->pool);
+    if (c->read->timer_set) {
+        ngx_del_timer(c->read);
+        c->read->timer_set = 0;
+    }
 
-    ngx_del_timer(c->read);
-    ngx_del_timer(c->write);
+    if (c->write->timer_set) {
+        ngx_del_timer(c->write);
+        c->write->timer_set = 0;
+    }
 
     ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
     ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
@@ -32,5 +37,7 @@ int ngx_event_close_connection(ngx_event
 
     c->fd = -1;
 
+    ngx_destroy_pool(c->pool);
+
     return rc;
 }