We recently observed the AB controller locking up when wiki API requests were slow to complete due to the wiki being backed up at the time. The use of requests API in YPWiki should make use of the timeout property http://requests.readthedocs.io/en/master/user/quickstart/#timeouts http://requests.readthedocs.io/en/master/user/advanced/#timeouts Furthermore we need to understand whether the status plugin can block the controller and if so work on a non-blocking solution.
Timeout implemented and deployed to both clusters: http://git.yoctoproject.org/clean/cgit.cgi/yocto-autobuilder/commit/?id=9bf6162d6602beed384072caf0127d1dd2e6e4b3