id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
17810	Switching from cookie-based sessions to memcached-based sessions raises exception	Gabriel Hurley	nobody	"When using the cookie-based session backend, the entire session cookie is stuffed into the session name. If you then switch the session backend to a backend with a length limit (such as memcached, or some DBs) you'll get very obtuse errors such as ""Key too long"" from memcached.

While arbitrarily switching session backends isn't generally supported behavior, this could be a huge problem for a production site if they ever decided cookie-based sessions weren't ideal for their uses and switched. It would immediately break for every user who had an existing session on the site.

Ideally, if the session backend is unable to retrieve the session due to an error during retrieval, a new session should be generated."	Bug	closed	contrib.sessions	1.4-beta-1	Release blocker	fixed			Accepted	0	0	0	0	0	0