diff --git a/core/Pool/Pool.php b/core/Pool/Pool.php
index 74c3e92a..57effa31 100644
--- a/core/Pool/Pool.php
+++ b/core/Pool/Pool.php
@@ -122,6 +122,9 @@ class Pool extends Component
 	{
 		$channel = $this->getChannel($name);
 		if (!$channel->isEmpty()) {
+			Coroutine::defer(function () {
+				echo '111';
+			});
 			$connection = $this->maxIdleQuantity($channel);
 			if ($this->checkCanUse($name, $connection)) {
 				return $connection;