Open Stack

Hi All,

noticed some (most but not all) of my network namespaces are no longer working:

# ip netns exec qdhcp-0a1d0a27-cffa-4de3-92c5-9d3fd3f2e74d ip addr
seting the network namespace failed: Invalid argument

strace gives only slightly more info that I can't parse and probably
adds no new information:

open("/var/run/netns/qdhcp-0a1d0a27-cffa-4de3-92c5-9d3fd3f2e74d", O_RDONLY) = 4
syscall_308(0x4, 0x40000000, 0x7fff9edc3799, 0x7fff9edc34e0, 0x430af0,
0x392d336564342d61, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0) = -1 (errno 22)
write(2, "seting the network namespace fai"..., 54seting the network
namespace failed: Invalid argument
) = 54

short of rebooting the controller how can I recover these?  Any
guesses why they failed, this namespace particularly is our main
client network and I was tcpdumping within it to debug issues earlier
this week (it's existed since August and through our grizzly to havana
update earlier this month)

-Jon