Hi,
Finally decided to get memcached up and running with Roundcube -- awesome work there.
I ran into a problem getting it to go at first though. Turned on all the logging in memcache and found this relevant bit:
<28 get d5f4fbf9a78ea7c63f2919f1ba544fa0
FOUND KEY d5f4fbf9a78ea7c63f2919f1ba544fa0 28 sending key d5f4fbf9a78ea7c63f2919f1ba544fa0 28 END
28: going from conn_parse_cmd to conn_mwrite 28: going from conn_mwrite to conn_new_cmd 28: going from conn_new_cmd to conn_waiting 28: going from conn_waiting to conn_read 28: going from conn_read to conn_parse_cmd <28 delete d5f4fbf9a78ea7c63f2919f1ba544fa0 1
28 CLIENT_ERROR bad command line format. Usage: delete <key> [noreply]
...which eventually led me to http://www.php.net/manual/en/memcache.delete.php where this problem is mentioned in comments. The PHP docs there specifically say not to include the timeout parameter when calling memcache->delete(), but unfortunately, due to a bug in the current php5-memcached package in Debian, not including the parameter causes php to automatically append a "1" to the end of the delete command, which breaks memcached.
In rcube_session.php, I mucked about with the first line of mc_destroy(), changing it to:
$ret = $this->memcache->delete($key, 0);
...which makes everything happy, despite being incorrect.
I searched the dev- and users- mailing list archives and didn't find any other references to this particular problem, so I'm just mentioning it here in case anybody else gets bitten by it.
Thanks,
- R.