pagespeed memcached enabled, when memcached server restarts, cache breaks until nginx is restarted as well

[vbtechsupport]

With memcached enabled in pagespeed, it seems whenever memcached server restarts, it breaks ngx_pagespeed cache until nginx web server is also restarted ?

ngx_pagespeed_message shows after memcached restart on CentOS 6.4 server the following

[Sat May 04 22:09:34 2013] [Error] [11913] AprMemCache::Put error: The timeout specified has expired (70007) on key rname/cf_n0ivl0jKcdvV6m1CHVLT/Z/DxxIHWGWTIEKaPV67xT@_@zAh0KLGvqBj8lGqcsH8UA.@v__@zAh0KLGvqBj8lGqcsH8U, value-size 73
[Sat May 04 22:09:34 2013] [Error] [11913] AprMemCache::MultiGet error: Internal error (20014) on 6 keys

Nginx 1.4.0 source compiled
memcached 1.4.15 source compiled
ngx_pagespeed 1.5.27.2 beta

Guess documentation needs to state, when memcached server is used, restarting it also requires nginx server restart ?

[oschaaf]

@vbtechsupport I think ngx_pagespeed is supposed to retry connecting to memcached after a while. If you wait for 5 minutes after restarting memcached, and then request a page, does it use memcached again?

[vbtechsupport]

Ah yes if i wait a while after memcached restarted seems pagespeed connects to memcached again without nginx restart

[jeffkaufman]

PageSpeed depends on it's cache being available in order to do rewrites. It can recover from memcache going away, but yes, if you restart memcached it's best if you also restart nginx.