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
7639	Locmem is not multiprocess nor threadsafe	Tomáš Kopeček	nobody	"Documentation says that this cache backend is safe in multiprocess environment and also threadsafe. This probably not true.
a) multiprocess - it's complete nonsense - every process maintains  its own cache object. So key found in c1 is not found in c2, also invalidation is impossible.
b) threads - problem is almost same - there is implementation of threadsafe writing/reading, but objects in threads are different so caches are different.

Solution:
a) Don't bother with this backend and say in documentation that is good only for development server or one htread/process servers, than it's completely ok to remove locking code.
b) Do it at least thread-safe (make some singleton object?)"	Uncategorized	closed	Core (Cache system)	dev	Normal	fixed			Design decision needed	0	0	0	0	0	0