Ensure query cache is not ArrayCache in production

lib/Doctrine/ORM/Configuration.php

@@ -381,10 +381,16 @@ class Configuration extends \Doctrine\DBAL\Configuration
      */
     public function ensureProductionSettings()
     {
-        if ( ! $this->getQueryCacheImpl()) {
+        $queryCacheImpl = $this->getQueryCacheImpl();
+
+        if ( ! $queryCacheImpl) {
             throw ORMException::queryCacheNotConfigured();
         }
 
+        if ($queryCacheImpl instanceof ArrayCache) {
+            throw ORMException::queryCacheUsesNonPersistentCache($queryCacheImpl);
+        }
+
         $metadataCacheImpl = $this->getMetadataCacheImpl();
 
         if ( ! $metadataCacheImpl) {

lib/Doctrine/ORM/ORMException.php

@@ -233,6 +233,16 @@ class ORMException extends Exception
         return new self('Class Metadata Cache is not configured.');
     }
 
+    /**
+     * @param \Doctrine\Common\Cache\Cache $cache
+     *
+     * @return ORMException
+     */
+    public static function queryCacheUsesNonPersistentCache(CacheDriver $cache)
+    {
+        return new self('Query Cache uses a non-persistent cache driver, ' . get_class($cache) . '.');
+    }
+
     /**
      * @param \Doctrine\Common\Cache\Cache $cache
      *

tests/Doctrine/Tests/ORM/ConfigurationTest.php

@@ -147,7 +147,7 @@ class ConfigurationTest extends PHPUnit_Framework_TestCase
     /**
      * Configures $this->configuration to use production settings.
      *
-     * @param boolean $skipCache Do not configure a cache of this type, either "query" or "metadata".
+     * @param string $skipCache Do not configure a cache of this type, either "query" or "metadata".
      */
     protected function setProductionSettings($skipCache = false)
     {
@@ -184,6 +184,16 @@ class ConfigurationTest extends PHPUnit_Framework_TestCase
         $this->configuration->ensureProductionSettings();
     }
 
+    public function testEnsureProductionSettingsQueryArrayCache()
+    {
+        $this->setProductionSettings();
+        $this->configuration->setQueryCacheImpl(new ArrayCache());
+        $this->setExpectedException(
+            'Doctrine\ORM\ORMException',
+            'Query Cache uses a non-persistent cache driver, Doctrine\Common\Cache\ArrayCache.');
+        $this->configuration->ensureProductionSettings();
+    }
+
     public function testEnsureProductionSettingsMetadataArrayCache()
     {
         $this->setProductionSettings();