diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolClearerPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolClearerPass.php
new file mode 100644
index 0000000000000..146c3c8c73416
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolClearerPass.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+final class CachePoolClearerPass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->findTaggedServiceIds('cache.pool') as $id => $attributes) {
+            foreach (array_reverse($attributes) as $attr) {
+                if (isset($attr['clearer'])) {
+                    $clearer = $container->getDefinition($attr['clearer']);
+                    $clearer->addMethodCall('addPool', array(new Reference($id)));
+                }
+                if (array_key_exists('clearer', $attr)) {
+                    break;
+                }
+            }
+        }
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolPass.php
index a625648a4ab99..3740922b435b2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/CachePoolPass.php
@@ -37,6 +37,7 @@ public function process(ContainerBuilder $container)
             }
         }
 
+        $aliases = $container->getAliases();
         $attributes = array(
             'provider',
             'namespace',
@@ -57,7 +58,10 @@ public function process(ContainerBuilder $container)
                 $tags[0]['namespace'] = $this->getNamespace($namespaceSuffix, $id);
             }
             if (isset($tags[0]['clearer'])) {
-                $clearer = $container->getDefinition($tags[0]['clearer']);
+                $clearer = strtolower($tags[0]['clearer']);
+                while (isset($aliases[$clearer])) {
+                    $clearer = (string) $aliases[$clearer];
+                }
             } else {
                 $clearer = null;
             }
@@ -78,7 +82,7 @@ public function process(ContainerBuilder $container)
             }
 
             if (null !== $clearer) {
-                $clearer->addMethodCall('addPool', array(new Reference($id)));
+                $pool->addTag('cache.pool', array('clearer' => $clearer));
             }
         }
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
index 7ed44c5bb84d2..63055fd303de1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
+++ b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
@@ -15,6 +15,7 @@
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddValidatorInitializersPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddConsoleCommandPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\CachePoolPass;
+use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\CachePoolClearerPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\ControllerArgumentValueResolverPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\FormPass;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\PropertyInfoPass;
@@ -91,6 +92,7 @@ public function build(ContainerBuilder $container)
         $container->addCompilerPass(new PropertyInfoPass());
         $container->addCompilerPass(new ControllerArgumentValueResolverPass());
         $container->addCompilerPass(new CachePoolPass());
+        $container->addCompilerPass(new CachePoolClearerPass(), PassConfig::TYPE_AFTER_REMOVING);
 
         if ($container->getParameter('kernel.debug')) {
             $container->addCompilerPass(new UnusedTagsPass(), PassConfig::TYPE_AFTER_REMOVING);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
index 89fac7324d683..eb3703cb6cb6a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
@@ -88,7 +88,7 @@
             </call>
         </service>
 
-        <service id="cache.default_clearer" class="Symfony\Component\HttpKernel\CacheClearer\Psr6CacheClearer" public="false">
+        <service id="cache.default_clearer" class="Symfony\Component\HttpKernel\CacheClearer\Psr6CacheClearer">
             <tag name="kernel.cache_clearer" />
         </service>
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php
new file mode 100644
index 0000000000000..62a41962316e2
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
+
+use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\CachePoolClearerPass;
+use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\CachePoolPass;
+use Symfony\Component\DependencyInjection\Compiler\RemoveUnusedDefinitionsPass;
+use Symfony\Component\DependencyInjection\Compiler\RepeatedPass;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Reference;
+
+class CachePoolClearerPassTest extends \PHPUnit_Framework_TestCase
+{
+    public function testPoolRefsAreWeak()
+    {
+        $container = new ContainerBuilder();
+
+        $publicPool = new Definition();
+        $publicPool->addArgument('namespace');
+        $publicPool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $container->setDefinition('public.pool', $publicPool);
+
+        $privatePool = new Definition();
+        $privatePool->setPublic(false);
+        $privatePool->addArgument('namespace');
+        $privatePool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $container->setDefinition('private.pool', $privatePool);
+
+        $clearer = new Definition();
+        $container->setDefinition('clearer', $clearer);
+        $container->setAlias('clearer_alias', 'clearer');
+
+        $pass = new RemoveUnusedDefinitionsPass();
+        $pass->setRepeatedPass(new RepeatedPass(array($pass)));
+        foreach (array(new CachePoolPass(), $pass, new CachePoolClearerPass()) as $pass) {
+            $pass->process($container);
+        }
+
+        $this->assertEquals(array(array('addPool', array(new Reference('public.pool')))), $clearer->getMethodCalls());
+    }
+}