diff --git a/System/Abstracts/Pool.php b/System/Abstracts/Pool.php
index a0173cc1..f23daa76 100644
--- a/System/Abstracts/Pool.php
+++ b/System/Abstracts/Pool.php
@@ -277,9 +277,9 @@ abstract class Pool extends Component
 	 */
 	public function clean(string $name)
 	{
-		var_dump(Timer::clear($this->creates));
+		var_dump($name, Timer::clear($this->creates));
 //		$this->warning('release ' . get_called_class() . ' pool...');
-		if (!isset($this->_items[$name])) {
+		if (!Context::inCoroutine() || !isset($this->_items[$name])) {
 			return;
 		}
 		$channel = $this->_items[$name];