diff --git a/lib/Doctrine/ORM/Mapping/MappingException.php b/lib/Doctrine/ORM/Mapping/MappingException.php
index 0eff17cd6..ad2ad9307 100644
--- a/lib/Doctrine/ORM/Mapping/MappingException.php
+++ b/lib/Doctrine/ORM/Mapping/MappingException.php
@@ -34,8 +34,18 @@ class MappingException extends \Doctrine\ORM\ORMException
 
     public static function identifierRequired($entityName)
     {
-        return new self("No identifier/primary key specified for Entity '$entityName'."
-                . " Every Entity must have an identifier/primary key.");
+        if (null != ($parent = get_parent_class($entityName))) {
+            return new self(sprintf(
+                'No identifier/primary key specified for Entity "%s" sub classe of "%s". Every Entity must have an identifier/primary key.',
+                $className, $parent
+            ));
+        }
+
+        return new self(sprintf(
+            'No identifier/primary key specified for Entity "%s". Every Entity must have an identifier/primary key.',
+            $entityName
+        ));
+
     }
 
     public static function invalidInheritanceType($entityName, $type)
@@ -144,7 +154,17 @@ class MappingException extends \Doctrine\ORM\ORMException
 
     public static function classIsNotAValidEntityOrMappedSuperClass($className)
     {
-        return new self('Class '.$className.' is not a valid entity or mapped super class.');
+        if (null != ($parent = get_parent_class($className))) {
+            return new self(sprintf(
+                'Class "%s" sub classe of "%s" is not a valid entity or mapped super class.',
+                $className, $parent
+            ));
+        }
+
+        return new self(sprintf(
+            'Class "%s" is not a valid entity or mapped super class.',
+            $className
+        ));
     }
 
     public static function propertyTypeIsRequired($className, $propertyName)
diff --git a/tests/Doctrine/Tests/Models/DDC889/DDC889Class.php b/tests/Doctrine/Tests/Models/DDC889/DDC889Class.php
new file mode 100644
index 000000000..7520568b0
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/DDC889/DDC889Class.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Tests\Models\DDC889;
+
+class DDC889Class extends DDC889SuperClass
+{
+
+    /**
+     * @Id
+     * @Column(type="integer")
+     * @GeneratedValue
+     */
+    protected $id;
+
+
+    public static function loadMetadata(\Doctrine\ORM\Mapping\ClassMetadataInfo $metadata)
+    {
+        $metadata->mapField(array(
+           'id'         => true,
+           'fieldName'  => 'id',
+           'type'       => 'integer',
+           'columnName' => 'id',
+        ));
+
+        $metadata->setIdGeneratorType(\Doctrine\ORM\Mapping\ClassMetadataInfo::GENERATOR_TYPE_AUTO);
+    }
+
+}
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/Models/DDC889/DDC889SuperClass.php b/tests/Doctrine/Tests/Models/DDC889/DDC889SuperClass.php
new file mode 100644
index 000000000..7cffe488b
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/DDC889/DDC889SuperClass.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Tests\Models\DDC889;
+
+/**
+ * @MappedSuperclass
+ */
+class DDC889SuperClass
+{
+
+    /** @Column() */
+    protected $name;
+
+    public static function loadMetadata(\Doctrine\ORM\Mapping\ClassMetadataInfo $metadata)
+    {
+        $metadata->mapField(array(
+           'fieldName'  => 'name',
+        ));
+
+        $metadata->isMappedSuperclass = true;
+        $metadata->setIdGeneratorType(\Doctrine\ORM\Mapping\ClassMetadataInfo::GENERATOR_TYPE_NONE);
+    }
+}
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
index b15481bdb..185bbeda3 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php
@@ -461,6 +461,22 @@ abstract class AbstractMappingDriverTest extends \Doctrine\Tests\OrmTestCase
         $this->assertEquals("ENUM('ONE','TWO')", $class->discriminatorColumn['columnDefinition']);
         $this->assertEquals("dtype", $class->discriminatorColumn['name']);
     }
+
+    /**
+     * @group DDC-889
+     * @expectedException Doctrine\ORM\Mapping\MappingException
+     * @expectedExceptionMessage Class "Doctrine\Tests\Models\DDC889\DDC889Class" sub classe of "Doctrine\Tests\Models\DDC889\DDC889SuperClass" is not a valid entity or mapped super class.
+     */
+    public function testinvalidEntityOrMappedSuperClassShouldMentionParentClasses()
+    {
+        $driver     = $this->_loadDriver();
+        $em         = $this->_getTestEntityManager();
+        $factory    = new \Doctrine\ORM\Mapping\ClassMetadataFactory();
+        $em->getConfiguration()->setMetadataDriverImpl($driver);
+        $factory->setEntityManager($em);
+
+        $factory->getMetadataFor('Doctrine\Tests\Models\DDC889\DDC889Class');
+    }
 }
 
 /**
diff --git a/tests/Doctrine/Tests/ORM/Mapping/PHPMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/PHPMappingDriverTest.php
index e14828e00..0aec237bc 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/PHPMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/PHPMappingDriverTest.php
@@ -25,4 +25,14 @@ class PHPMappingDriverTest extends AbstractMappingDriverTest
 
         return new PHPDriver($path);
     }
+
+    /**
+     * All class are entitier for php driver
+     * 
+     * @group DDC-889
+     */
+    public function testinvalidEntityOrMappedSuperClassShouldMentionParentClasses()
+    {
+        $this->createClassMetadata('Doctrine\Tests\Models\DDC889\DDC889Class');
+    }
 }
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/StaticPHPMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/StaticPHPMappingDriverTest.php
index 1a5a2074e..ab84a48bd 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/StaticPHPMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/StaticPHPMappingDriverTest.php
@@ -14,4 +14,15 @@ class StaticPHPMappingDriverTest extends AbstractMappingDriverTest
     {
         return new StaticPHPDriver(__DIR__ . DIRECTORY_SEPARATOR . 'php');
     }
+
+
+    /**
+     * All class with static::loadMetadata are entities for php driver
+     *
+     * @group DDC-889
+     */
+    public function testinvalidEntityOrMappedSuperClassShouldMentionParentClasses()
+    {
+        $this->createClassMetadata('Doctrine\Tests\Models\DDC889\DDC889Class');
+    }
 }
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
index 6a852bc69..3106bc1d3 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
@@ -84,6 +84,16 @@ class XmlMappingDriverTest extends AbstractMappingDriverTest
             array(__DIR__ . "/xml/CatNoId.dcm.xml"),
         );
     }
+
+    /**
+     * @group DDC-889
+     * @expectedException Doctrine\ORM\Mapping\MappingException
+     * @expectedExceptionMessage Invalid mapping file 'Doctrine.Tests.Models.DDC889.DDC889Class.dcm.xml' for class 'Doctrine\Tests\Models\DDC889\DDC889Class'.
+     */
+    public function testinvalidEntityOrMappedSuperClassShouldMentionParentClasses()
+    {
+        $this->createClassMetadata('Doctrine\Tests\Models\DDC889\DDC889Class');
+    }
 }
 
 class CTI
diff --git a/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889Class.php b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889Class.php
new file mode 100644
index 000000000..90cfdc10b
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889Class.php
@@ -0,0 +1,12 @@
+<?php
+
+use Doctrine\ORM\Mapping\ClassMetadataInfo;
+
+$metadata->mapField(array(
+   'id'         => true,
+   'fieldName'  => 'id',
+   'type'       => 'integer',
+   'columnName' => 'id',
+));
+
+//$metadata->setIdGeneratorType(ClassMetadataInfo::GENERATOR_TYPE_AUTO);
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889SuperClass.php b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889SuperClass.php
new file mode 100644
index 000000000..e56cc9bfd
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/php/Doctrine.Tests.Models.DDC889.DDC889SuperClass.php
@@ -0,0 +1,11 @@
+<?php
+
+use Doctrine\ORM\Mapping\ClassMetadataInfo;
+
+$metadata->mapField(array(
+   'fieldName'  => 'name',
+   'type'       => 'string',
+  ));
+$metadata->isMappedSuperclass = true;
+$metadata->setCustomRepositoryClass("Doctrine\Tests\Models\DDC889\DDC889SuperClass");
+$metadata->setIdGeneratorType(ClassMetadataInfo::GENERATOR_TYPE_AUTO);
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.xml
new file mode 100644
index 000000000..4a8935c9a
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+         
+    <class name="Doctrine\Tests\Models\DDC889\DDC889Class">
+        <id name="id" type="integer" column="id">
+            <generator strategy="AUTO"/>
+        </id>
+    </class>
+        
+</doctrine-mapping>
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.xml
new file mode 100644
index 000000000..48fa4fb83
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+                              
+    <mapped-superclass name="Doctrine\Tests\Models\DDC889\DDC889SuperClass">
+        <field name="name" column="name" type="string"/>
+    </mapped-superclass>
+        
+</doctrine-mapping>
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.yml b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.yml
new file mode 100644
index 000000000..567e5d585
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889Class.dcm.yml
@@ -0,0 +1,8 @@
+Doctrine\Tests\Models\DDC889\DDC889Class:
+  type: class
+  id:
+    id:
+      type: integer
+      unsigned: true
+      generator:
+        strategy: AUTO
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.yml b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.yml
new file mode 100644
index 000000000..7974d552d
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/yaml/Doctrine.Tests.Models.DDC889.DDC889SuperClass.dcm.yml
@@ -0,0 +1,5 @@
+Doctrine\Tests\Models\DDC889\DDC889SuperClass:
+  type: mappedSuperclass
+  fields:
+    name:
+      type: string
\ No newline at end of file