diff --git a/System/Abstracts/Pool.php b/System/Abstracts/Pool.php
index 99a36fe1..8449b9f7 100644
--- a/System/Abstracts/Pool.php
+++ b/System/Abstracts/Pool.php
@@ -278,6 +278,7 @@ abstract class Pool extends Component
 	public function clean(string $name)
 	{
 		Timer::clear($this->creates);
+		$this->warning('release ' . get_called_class() . ' pool...');
 		if (!Context::inCoroutine() || !isset($this->_items[$name])) {
 			return;
 		}