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Cause: python-memcached can't get statistics of memcached server on UNIX socket
Consequence: method get_stats() throws an exception
Fix: Alter the get_stats() method
Result: get_stats() method works as expected
memcached can be configured to listen either on normal INET sockets or a UNIX domain socket.
If the server is configured on a UNIX domain socket and you call get_stats() to retrieve the server statistics then memcache.py will throw an exception:
_Host instance has no attribute 'ip'
This occurs because get_stats() assumes the net family is INET and as such has an ip address, it doesn't because it's UNIX domain socket.
Attached is a trivial patch to correct the problem, it's taken from a later upstream version.
To reproduce the problem you have to run a memcached instance listing on a UNIX socket, the standard initscript does not support this, instead you should do this:
/usr/bin/memcached -d -s $SOCKET_PATH
then you'll need a python program:
import memcache
servers = ['unix:%s' % socket_path]
mc = memcache.Client(servers, debug=0)
print mc.get_stats()
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New Contents:
Cause: python-memcached can't get statistics of memcached server on UNIX socket
Consequence: method get_stats() throws an exception
Fix: Alter the get_stats() method
Result: get_stats() method works as expected
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2012-0889.html