Issue #2802803 by Berdir, AdamPS, Darren Oh, Munavijayalakshmi, jackbravo, slashrsm, mmbk, Dane Powell, LittleCoding, gapple, catch, wiifm, alexpott, quantumized, acbramley: Temporary files whose files are missing on the disk result in never-ending error log messages

core/modules/file/file.module

@@ -728,12 +728,17 @@ function file_cron() {
     foreach ($files as $file) {
       $references = \Drupal::service('file.usage')->listUsage($file);
       if (empty($references)) {
-        if (file_exists($file->getFileUri())) {
+        if (!file_exists($file->getFileUri())) {
-          $file->delete();
+          if (!file_valid_uri($file->getFileUri())) {
-        }
+            \Drupal::logger('file system')->warning('Temporary file "%path" that was deleted during garbage collection did not exist on the filesystem. This could be caused by a missing stream wrapper.', ['%path' => $file->getFileUri()]);
-        else {
+          }
-          \Drupal::logger('file system')->error('Could not delete temporary file "%path" during garbage collection', ['%path' => $file->getFileUri()]);
+          else {
+            \Drupal::logger('file system')->warning('Temporary file "%path" that was deleted during garbage collection did not exist on the filesystem.', ['%path' => $file->getFileUri()]);
+          }
         }
+        // Delete the file entity. If the file does not exist, this will
+        // generate a second notice in the watchdog.
+        $file->delete();
       }
       else {
         \Drupal::logger('file system')->info('Did not delete temporary file "%path" during garbage collection because it is in use by the following modules: %modules.', ['%path' => $file->getFileUri(), '%modules' => implode(', ', array_keys($references))]);

core/modules/file/tests/src/Kernel/DeleteTest.php

@@ -77,4 +77,29 @@ class DeleteTest extends FileManagedUnitTestBase {
     $this->assertFalse(File::load($file->id()), 'File was removed from the database.');
   }
 
+  /**
+   * Tries to run cron deletion on file deleted from the file-system.
+   */
+  public function testCronDeleteNonExistingTemporary() {
+    $file = $this->createFile();
+    // Delete the file, but leave it in the file_managed table.
+    \Drupal::service('file_system')->delete($file->getFileUri());
+    $this->assertFalse(file_exists($file->getFileUri()), 'File is deleted from the filesystem.');
+    $this->assertTrue(File::load($file->id()), 'File exist in file_managed table');
+
+    // Call file_cron() to clean up the file. Make sure the changed timestamp
+    // of the file is older than the system.file.temporary_maximum_age
+    // configuration value.
+    \Drupal::database()->update('file_managed')
+      ->fields([
+        'changed' => \Drupal::time()->getRequestTime() - ($this->config('system.file')->get('temporary_maximum_age') + 1),
+      ])
+      ->condition('fid', $file->id())
+      ->execute();
+    \Drupal::service('cron')->run();
+    file_test_reset();
+
+    $this->assertFalse(File::load($file->id()), 'File was removed from the database.');
+  }
+
 }