[staging] 5.1.2.staging.iso job failed with the error "http://172.17.42.1:58410/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 7 - "couldn't connect to host""

Job failed:
https://old-stable-ci.infra.mirantis.net/job/5.1.2.staging.iso/261/console

with the following error:
[91mhttp://172.17.42.1:58410/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 7 - "couldn't connect to host"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: nailgun. Please verify its path and try again
time="2015-08-24T07:19:25Z" level="info" msg="The command [/bin/sh -c rm -rf /etc/yum.repos.d/*; echo -e \"[nailgun]\\nname=Nailgun Local Repo\\nbaseurl=http://$(route -n | awk '/^0.0.0.0/ { print $2 }'):58410/os/x86_64/\\ngpgcheck=0\" > /etc/yum.repos.d/nailgun.repo; yum clean all; yum --quiet install -y ruby21-nailgun-mcagents sysstat] returned a non-zero code: 1"
make: *** [/home/jenkins/workspace/tmp/5.1.2.staging.iso/build/docker/astute.done] Error 1
Build step 'Execute shell' marked build as failure

Note:
Looks like it was temporary issue with network.