Issue #2646410 by claudiu.cristea, dawehner: Container cannot be saved to cache

core/lib/Drupal/Core/DrupalKernel.php

@@ -861,7 +861,7 @@ protected function initializeContainer() {
 
     // If needs dumping flag was set, dump the container.
     if ($this->containerNeedsDumping && !$this->cacheDrupalContainer($container_definition)) {
-      $this->container->get('logger.factory')->get('DrupalKernel')->notice('Container cannot be saved to cache.');
+      $this->container->get('logger.factory')->get('DrupalKernel')->error('Container cannot be saved to cache.');
     }
 
     return $this->container;

core/modules/system/src/Tests/Update/UpdatePathTestBaseTest.php

@@ -82,6 +82,17 @@ public function testUpdateHookN() {
     // Increment the schema version.
     \Drupal::state()->set('update_test_schema_version', 8001);
     $this->runUpdates();
+
+    $select = \Drupal::database()->select('watchdog');
+    $select->orderBy('wid', 'DESC');
+    $select->range(0, 5);
+    $select->fields('watchdog', ['message']);
+
+    $container_cannot_be_saved_messages = array_filter(iterator_to_array($select->execute()), function($row) {
+      return strpos($row->message, 'Container cannot be saved to cache.') !== FALSE;
+    });
+    $this->assertEqual([], $container_cannot_be_saved_messages);
+
     // Ensure schema has changed.
     $this->assertEqual(drupal_get_installed_schema_version('update_test_schema', TRUE), 8001);
     // Ensure the index was added for column a.

update.php

@@ -13,7 +13,7 @@
 
 $autoloader = require_once 'autoload.php';
 
-$kernel = new UpdateKernel('prod', $autoloader);
+$kernel = new UpdateKernel('prod', $autoloader, FALSE);
 $request = Request::createFromGlobals();
 
 $response = $kernel->handle($request);