diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
index 3c32cb1c4a33a..c5dc408cf5211 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
@@ -75,6 +75,17 @@ protected function doWarmUp($cacheDir, ArrayAdapter $arrayAdapter)
                  * environment but is always added to the annotations.map file by some Symfony default behaviors,
                  * and you always end up with a not found Annotation.
                  */
+            } catch (\Exception $e) {
+                // Ignore exceptions that are thrown during this class autoload.
+                if (false === array_search([
+                    'function' => 'spl_autoload_call',
+                    'args' => [$class],
+                ], $e->getTrace(), true) ||
+                    class_exists($class, false) ||
+                    interface_exists($class, false) ||
+                    trait_exists($class, false)) {
+                    throw $e;
+                }
             }
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
index 917ea47235fd7..7ac72b1c2a2f5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
@@ -60,6 +60,17 @@ protected function doWarmUp($cacheDir, ArrayAdapter $arrayAdapter)
                     // ignore failing reflection
                 } catch (AnnotationException $e) {
                     // ignore failing annotations
+                } catch (\Exception $e) {
+                    // Ignore exceptions that are thrown during this mapped class autoload.
+                    if (false === array_search([
+                        'function' => 'spl_autoload_call',
+                        'args' => [$mappedClass],
+                    ], $e->getTrace(), true) ||
+                        class_exists($mappedClass, false) ||
+                        interface_exists($mappedClass, false) ||
+                        trait_exists($mappedClass, false)) {
+                        throw $e;
+                    }
                 }
             }
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
index 8ac38133c06ee..a30383be9b23a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
@@ -65,6 +65,17 @@ protected function doWarmUp($cacheDir, ArrayAdapter $arrayAdapter)
                     // ignore failing reflection
                 } catch (AnnotationException $e) {
                     // ignore failing annotations
+                } catch (\Exception $e) {
+                    // Ignore exceptions that are thrown during this mapped class autoload.
+                    if (false === array_search([
+                        'function' => 'spl_autoload_call',
+                        'args' => [$mappedClass],
+                    ], $e->getTrace(), true) ||
+                        class_exists($mappedClass, false) ||
+                        interface_exists($mappedClass, false) ||
+                        trait_exists($mappedClass, false)) {
+                        throw $e;
+                    }
                 }
             }
         }