In /etc/swift/proxy-server.conf

Section "[pipeline:main]" I modified the following pipeline by adding ceilometer as given in manual installation guide of openstack-mitaka(http://docs.openstack.org/mitaka/install-guide-rdo/ceilometer-swift.html).

pipeline = ceilometer catch_errors gatekeeper healthcheck proxy-logging cache container_sync bulk ratelimit authtoken keystoneauth container-quotas account-quotas slo dlo versioned_writes proxy-logging proxy-server

and edited

[filter:ceilometer]
paste.filter_factory = ceilometermiddleware.swift:filter_factory
control_exchange = swift
url = rabbit://openstack:root123@controller:5672/
driver = messagingv2
topic = notifications
log_level = WARN

After that I restart the proxy-server service. But after this step swift commands stop working.

This is the output of any swift command

[root@localhost swift]# swift --d stat
DEBUG:keystoneclient.auth.identity.v3.base:Making authentication request to http://controller:35357/v3/auth/tokens
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): controller
DEBUG:requests.packages.urllib3.connectionpool:"POST /v3/auth/tokens HTTP/1.1" 201 4020
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): controller

can anyone please help. I am unable to track whats going wrong, because I just followed installation-guide.