Comment 7 for bug 1630664

I am seeing that still happening with keystone token fetch. It just hit this Ocata patch: https://review.openstack.org/#/c/460909/

In http://logs.openstack.org/09/460909/2/check/gate-tempest-dsvm-neutron-linuxbridge-ubuntu-xenial/67904c9/logs/apache/tls-proxy_error.txt.gz we see:

[Fri Apr 28 12:46:47.763965 2017] [proxy_http:error] [pid 30068:tid 140271090042624] (20014)Internal error (specific information not available): [client 104.130.119.120:50002] [frontend 104.130.119.120:443] AH01102: error reading status line from remote server 104.130.119.120:80
[Fri Apr 28 12:46:47.764003 2017] [proxy:error] [pid 30068:tid 140271090042624] [client 104.130.119.120:50002] [frontend 104.130.119.120:443] AH00898: Error reading from remote server returned by /identity_admin/v3/auth/tokens

The request that triggered the failure doesn't seem to show up in keystone log.