From 4a7bd031e5b637fe0049ae9b569c284849f67c2f Mon Sep 17 00:00:00 2001
From: mark_story <mark@freshbooks.com>
Date: Sat, 27 Aug 2011 11:52:29 -0400
Subject: [PATCH] Adding a file_exists() check before unlinking cache files.
 This prevents issues where two concurrent requests could be clearing the same
 cache files. Fixes #1936

---
 lib/Cake/Cache/Engine/FileEngine.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/Cake/Cache/Engine/FileEngine.php b/lib/Cake/Cache/Engine/FileEngine.php
index c8eafbd0b..f81889dcb 100644
--- a/lib/Cake/Cache/Engine/FileEngine.php
+++ b/lib/Cake/Cache/Engine/FileEngine.php
@@ -240,7 +240,9 @@ class FileEngine extends CacheEngine {
 			}
 			$path = $this->_File->getRealPath();
 			$this->_File = null;
-			unlink($path);
+			if (file_exists($path)) {
+				unlink($path);
+			}
 		}
 		$dir->close();
 		return true;