Service Temporarily Unavailable after upgrading to 1.9.1.1

[Geert82]

I get a message "Service Temporarily Unavailable" when i visit the website by the domainname http://domain.com .

But I can see my homepage when i use http://domein.com/index.php every product, category functions without any issues.

I have no maintenance.flag file in the site root. I already flushed all the caches, deactivated all the caches, removed the contents from the session, cache folder. Recreated the url rewrites, reindexed everything, dropped the contents of core_url_rewrite . I don't see any warnings/errors in the logs. Nothing seems to work .

How can i solve this issue?

[Geert82 · Accepted solution]

Solved, i reinstalled all the 1.9.1.1 modules in magento connect manager :-).