Is there a mechanism to time out individual operations? If memcached freezes, then it appears my calls to 'get' will block until memcached wakes up. Is there any way to set a timeout for that call?
I can repro this in my unit tests by sending a SIGSTOP to memcached before doing a 'get'? Here are my observations: apr_memcache_multgetp seems to time out in bounded time if I SIGSTOP the memcached process. Yes! apr_memcache_getp seems to hang indefinitely if I SIGSTOP the memcached process. apr_memcache_set seems to hang indefinitely if I SIGSTOP the memcached process. apr_memcache_delete seems to hang indefinitely if I SIGSTOP the memcached process. apr_memcache_stats seems to hang indefinitely if I SIGSTOP the memcached process. That last one really sucks as I am using that to print the status of all my cache shards to the log file if I detected a problem :( Why does apr_memcache_multgetp do what I want and not the others? Can I induce the others to have reasonable timeout behavior? When I SIGSTOP memcached this makes it hard to even restart Apache, at least with graceful-stop. On a related note, the apr_memcache documentation<http://apr.apache.org/docs/apr-util/1.4/group___a_p_r___util___m_c.html>is very thin. I'd be happy to augment it with my observations on its usage and the meaning of some of the arguments if that was desired. How would I go about that? -Josh
