magento2: developer mode throws an exception, but production mode is good

My working environment looks like this. And I run magento with a fresh installer by composer create-project. Fedora 23 kernal: 4.4.9-300.fc23.x86_64

| Name             | Magento                          |
| Version          | 2.0.7                            |
| Edition          | Community                        |
| Application Mode | developer 

PHP 5.6.21 (cli) (built: Apr 28 2016 06:17:51) 
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with XCache v3.2.0, Copyright (c) 2005-2014, by mOo
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
    with Xdebug v2.3.3, Copyright (c) 2002-2015, by Derick Rethans
    with XCache Optimizer v3.2.0, Copyright (c) 2005-2014, by mOo
    with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo
    with XCache Coverager v3.2.0, Copyright (c) 2005-2014, by mOo

It is reporting the following warnings, when I was debugging and found it was caused by

$schema = 'urn:magento:module:Magento_Ui:etc/ui_definition.xsd'
/home/jimmy/www/magento2/porto/vendor/magento/module-ui/etc/ui_definition.xsd

Warning: DOMDocument::schemaValidate(): Invalid Schema in /home/jimmy/www/magento2/porto/vendor/magento/framework/Config/Dom.php on line 290
#0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'DOMDocument::sc...', '/home/jimmy/www...', 290, Array)
#1 /home/jimmy/www/magento2/porto/vendor/magento/framework/Config/Dom.php(290): DOMDocument->schemaValidate('/home/jimmy/www...')
#2 /home/jimmy/www/magento2/porto/vendor/magento/framework/View/Element/UiComponent/Config/DomMerger.php(350): Magento\Framework\Config\Dom::validateDomDocument(Object(DOMDocument), 'urn:magento:mod...')
#3 /home/jimmy/www/magento2/porto/vendor/magento/framework/View/Element/UiComponent/Config/DomMerger.php(326): Magento\Framework\View\Element\UiComponent\Config\DomMerger->validateDomDocument(Object(DOMDocument))
#4 /home/jimmy/www/magento2/porto/vendor/magento/framework/View/Element/UiComponent/Config/DomMerger.php(393): Magento\Framework\View\Element\UiComponent\Config\DomMerger->createDomDocument('<?xml version="...')
#5 /home/jimmy/www/magento2/porto/vendor/magento/framework/View/Element/UiComponent/Config/Reader.php(60): Magento\Framework\View\Element\UiComponent\Config\DomMerger->merge('<?xml version="...')
#6 /home/jimmy/www/magento2/porto/vendor/magento/framework/View/Element/UiComponent/Config/Reader.php(47): Magento\Framework\View\Element\UiComponent\Config\Reader->readFiles(Array)
#7 /home/jimmy/www/magento2/porto/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(101): Magento\Framework\View\Element\UiComponent\Config\Reader->__construct(Object(Magento\Framework\View\Element\UiComponent\Config\FileCollector\AggregatedFileCollector), Object(Magento\Framework\View\Element\UiComponent\Config\Converter), Object(Magento\Framework\View\Element\UiComponent\Config\DomMerger))
#8 /home/jimmy/www/magento2/porto/vendor/magento/framework/ObjectManager/Factory/Compiled.php(88): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array)