calibre internal APIs：max_articles_per_feed & oldest_article

[iray1991]

I've Switched to Advanced mode and changed the settings from :

class AdvancedUserRecipe1327999270(BasicNewsRecipe):
title = u'\u4f59\u665f'
oldest_article = 365
max_articles_per_feed = 100
auto_cleanup = True

feeds = [(u'\u4f59\u665f', u'http://www.luanxiang.org/blog/feed')]

into:
class AdvancedUserRecipe1327999270(BasicNewsRecipe):
title = u'\u4f59\u665f'
oldest_article = 10000
max_articles_per_feed = 10000
auto_cleanup = True

feeds = [(u'\u4f59\u665f', u'http://www.luanxiang.org/blog/feed')]

But when I download the RSS again it turns out to be：

<urlopen error [Errno 10060] >

can you give more reference for me?Does that mean the API has a number limitation and we can't set it into any number which is lager？