MAGETWO-95853: Can't flush Images cache in admin

Author: Oleksandr Iegorov

lib/internal/Magento/Framework/Filesystem/Directory/Write.php

@@ -175,6 +175,7 @@ public function createSymlink($path, $destination, WriteInterface $targetDirecto
      */
     public function delete($path = null)
     {
+        $exceptionMessages = [];
         $this->validatePath($path);
         if (!$this->isExist($path)) {
             return true;
@@ -183,11 +184,54 @@ public function delete($path = null)
         if ($this->driver->isFile($absolutePath)) {
             $this->driver->deleteFile($absolutePath);
         } else {
-            $this->driver->deleteDirectory($absolutePath);
+            try {
+                $this->deleteFilesRecursively($absolutePath);
+                $this->driver->deleteDirectory($absolutePath);
+            } catch (FileSystemException $e) {
+                $exceptionMessages[] = $e->getMessage();
+            }
+        }
+        if (!empty($exceptionMessages)) {
+            throw new FileSystemException(
+                new \Magento\Framework\Phrase(
+                    \implode(' ', $exceptionMessages)
+                )
+            );
         }
         return true;
     }
 
+    /**
+     * Delete files recursively
+     *
+     * Implemented in order to delete as much files as possible and collect all exceptions
+     *
+     * @param string $path
+     * @return void
+     * @throws FileSystemException
+     */
+    private function deleteFilesRecursively(string $path)
+    {
+        $exceptionMessages = [];
+        $entitiesList = $this->driver->readDirectoryRecursively($path);
+        foreach ($entitiesList as $entityPath) {
+            if (!$this->driver->isDirectory($entityPath)) {
+                try {
+                    $this->driver->deleteFile($entityPath);
+                } catch (FileSystemException $e) {
+                    $exceptionMessages[] = $e->getMessage();
+                }
+            }
+        }
+        if (!empty($exceptionMessages)) {
+            throw new FileSystemException(
+                new \Magento\Framework\Phrase(
+                    \implode(' ', $exceptionMessages)
+                )
+            );
+        }
+    }
+
     /**
      * Change permissions of given path
      *

lib/internal/Magento/Framework/Filesystem/Driver/File.php

@@ -399,16 +399,28 @@ public function deleteFile($path)
      */
     public function deleteDirectory($path)
     {
+        $exceptionMessages = [];
         $flags = \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::UNIX_PATHS;
         $iterator = new \FilesystemIterator($path, $flags);
         /** @var \FilesystemIterator $entity */
         foreach ($iterator as $entity) {
             if ($entity->isDir()) {
-                $this->deleteDirectory($entity->getPathname());
+                try {
+                    $this->deleteDirectory($entity->getPathname());
+                } catch (FileSystemException $exception) {
+                    $exceptionMessages[] = $exception->getMessage();
+                }
             } else {
                 $this->deleteFile($entity->getPathname());
             }
         }
+        if (!empty($exceptionMessages)) {
+            throw new FileSystemException(
+                new \Magento\Framework\Phrase(
+                    \implode(' ', $exceptionMessages)
+                )
+            );
+        }
         $result = @rmdir($this->getScheme() . $path);
         if (!$result) {
             throw new FileSystemException(