Since setting up section.io I regularly get this error.
502 Bad Gateway Error - Upstream Origin Server was Unreachable
Screenshot here: http://screencast.com/t/aoUFZz89Koc
I suspect it is a timeout of some sort, as it regularly occurs when performing functions like reindexing in the magento admin panel.
The error is returned at exactly 60 seconds and occurs every time a process takes longer than this.
It doesn’t seem to interrupt the process, for example if I navigate back to magento, the task has or will generally finish.
Is there a way to change this setting, timeout limit so this error is not returned and instead the browser continues to wait?