i want to run memcache deamons on my local mac osx (latest os( machine for developing. when i start the first instance like:
sudo memcached -m 8mb -l localhost -p 11211 -d -vv
everything seems to be ok. if i make a lsof on the port this is how it looks like:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 614 root 4u IPv4 0xffffff80113eeda8 0t0 TCP adobe-dns.adobe.com:11211 (LISTEN)
memcached 614 root 5u IPv6 0xffffff800c5c97b0 0t0 TCP localhost:11211 (LISTEN)
memcached 614 root 6u IPv6 0xffffff800c5c94a0 0t0 TCP localhost:11211 (LISTEN)
memcached 614 root 7u IPv4 0xffffff800c3b02c0 0t0 UDP adobe-dns.adobe.com:11211
memcached 614 root 8u IPv6 0xffffff800c3af140 0t0 UDP localhost:11211
memcached 614 root 9u IPv6 0xffffff800c3afa00 0t0 UDP localhost:11211
i find this quite strange ... and if i try the second instance on a new port like:
sudo memcached -m 8mb -l localhost -p 11212 -d -vv
i get an error saying:
failed to listen on UDP port 11211 udp listen: Address already in use
even though im starting the daemon on port 11212. can somebody explain or give any hints what this means - what is happening there
THX
Frank
You need to add -U 0 unless you care about UDP support, in which case you'd want to add -U 11212. We straightened this out a bit more in later versions so it does something more intuitive.