Thread:Project:Support desk/Caching issue makes MediaWiki painfully slow/reply (4)

This was caused by mw bug (or bug in some xcache version).

xcache_get returns NULL if nothing can be acquired from cache, but mw waits for false.

at line 147 of includes/objectcache/BagOStuff.php, while xcache will return NULL in this case, so

at line 581 of includes/cache/MessageCache.php will get timeout in 10 seconds (default value).

mediawiki 1.20.2, xcache v3.0.1

I'll report this to bugzilla if not forget.