From 29c6c3b59a0388bed4781eced4aa5f42df6fabb5 Mon Sep 17 00:00:00 2001
From: Adrian Rudnik <adrian@klonmaschine.de>
Date: Tue, 22 Apr 2025 19:45:21 +0200
Subject: [PATCH 1/2] [Scheduler] Throw error on duplicate schedule provider
 service registration on the same scheduler name

---
 .../AddScheduleMessengerPass.php              |  5 +++
 .../RegisterProviderTest.php                  | 34 +++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 src/Symfony/Component/Scheduler/Tests/DependencyInjection/RegisterProviderTest.php

diff --git a/src/Symfony/Component/Scheduler/DependencyInjection/AddScheduleMessengerPass.php b/src/Symfony/Component/Scheduler/DependencyInjection/AddScheduleMessengerPass.php
index 696422e0d28da..64880149244e1 100644
--- a/src/Symfony/Component/Scheduler/DependencyInjection/AddScheduleMessengerPass.php
+++ b/src/Symfony/Component/Scheduler/DependencyInjection/AddScheduleMessengerPass.php
@@ -46,6 +46,11 @@ public function process(ContainerBuilder $container): void
         $scheduleProviderIds = [];
         foreach ($container->findTaggedServiceIds('scheduler.schedule_provider') as $serviceId => $tags) {
             $name = $tags[0]['name'];
+
+            if (isset($scheduleProviderIds[$name])) {
+                throw new InvalidArgumentException(\sprintf('Schedule provider service "%s" can not replace already registered service "%s" for schedule "%s". Make sure to register only one provider per schedule name.', $serviceId, $scheduleProviderIds[$name], $name), 1);
+            }
+
             $scheduleProviderIds[$name] = $serviceId;
         }
 
diff --git a/src/Symfony/Component/Scheduler/Tests/DependencyInjection/RegisterProviderTest.php b/src/Symfony/Component/Scheduler/Tests/DependencyInjection/RegisterProviderTest.php
new file mode 100644
index 0000000000000..8bbfe41f71be4
--- /dev/null
+++ b/src/Symfony/Component/Scheduler/Tests/DependencyInjection/RegisterProviderTest.php
@@ -0,0 +1,34 @@
+<?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\Component\Scheduler\Tests\DependencyInjection;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\Scheduler\DependencyInjection\AddScheduleMessengerPass;
+use Symfony\Component\Scheduler\Tests\Fixtures\SomeScheduleProvider;
+
+class RegisterProviderTest extends TestCase
+{
+    public function testErrorOnMultipleProvidersForTheSameSchedule()
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionCode(1);
+
+        $container = new ContainerBuilder();
+
+        $container->register('provider_a', SomeScheduleProvider::class)->addTag('scheduler.schedule_provider', ['name' => 'default']);
+        $container->register('provider_b', SomeScheduleProvider::class)->addTag('scheduler.schedule_provider', ['name' => 'default']);
+
+        (new AddScheduleMessengerPass())->process($container);
+    }
+}

From d7c2acedcaa3b9299be531ba02ac8f4b4823a5a2 Mon Sep 17 00:00:00 2001
From: adrianrudnik <adrian@klonmaschine.de>
Date: Wed, 23 Apr 2025 01:15:37 +0200
Subject: [PATCH 2/2] [Scheduler] Updated the CHANGELOG

---
 src/Symfony/Component/Scheduler/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Symfony/Component/Scheduler/CHANGELOG.md b/src/Symfony/Component/Scheduler/CHANGELOG.md
index 67512476a7a8e..26067e3589104 100644
--- a/src/Symfony/Component/Scheduler/CHANGELOG.md
+++ b/src/Symfony/Component/Scheduler/CHANGELOG.md
@@ -5,6 +5,7 @@ CHANGELOG
 ---
 
  * Add `TriggerNormalizer`
+ * Throw exception when multiple schedule provider services are registered under the same scheduler name
 
 7.2
 ---