XF 1.1 An unexpected error has occurred/other errors

[Darfuria]

Intermittently, I get one of three errors on any page of my XF forum.

1. "An unexpected error has occurred" on white screen
2. Google Chrome error "Error 139 (net::ERR_TEMPORARILY_THROTTLED): Requests to the server have been temporarily throttled."
3. Mysqli statement execute error : Prepared statement needs to be re-prepared
   Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297
   Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
   Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 753
   Zend_Db_Adapter_Abstract->fetchRow() in XenForo/Model/Thread.php at line 44
   XenForo_Model_Thread->getThreadById() in
   XenForo/ControllerHelper/ForumThreadPost.php at line 152
   XenForo_ControllerHelper_ForumThreadPost->getThreadOrError() in XenForo/ControllerHelper/ForumThreadPost.php at line 74
   XenForo_ControllerHelper_ForumThreadPost->assertThreadValidAndViewable() in XenForo/ControllerPublic/Thread.php at line 41
   XenForo_ControllerPublic_Thread->actionIndex() in XenForo/FrontController.php at line 310
   XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
   XenForo_FrontController->run() in /.../index.php at line 13

This error lasts for about ten minutes, and then the forum returns to functioning normally. I have tried disabling the small amount of (updated) addons I have installed, but that doesn't seem to have resolved the issue. Any thoughts?

 

[Jake Bunce]

1) View the source code of that page. It will have a more detailed error.

2) It's a Chrome thing. I found this:

http://www.reddit.com/r/netsec/comments/lbedb/til_chrome_has_automatic_antiddos_measures_built/

3) Annoying server problem. See this thread:

http://xenforo.com/community/threads/error-on-install.17901/