Bug 1271664

It looks like the scripts for this package don't start the service after an upgrade:

[stack@instack-prv images-7.1]$ sudo rpm -q --scripts rabbitmq-server
preinstall scriptlet (using /bin/sh):

if [ $1 -gt 1 ]; then
  # Upgrade - stop previous instance of rabbitmq-server
  systemctl stop rabbitmq-server.service
fi

# create rabbitmq group
if ! getent group rabbitmq >/dev/null; then
        groupadd -r rabbitmq
fi

# create rabbitmq user
if ! getent passwd rabbitmq >/dev/null; then
        useradd -r -g rabbitmq -d /var/lib/rabbitmq rabbitmq \
            -c "RabbitMQ messaging server"
fi
postinstall scriptlet (using /bin/sh):

if [ $1 -eq 1 ] ; then 
        # Initial installation 
        /usr/bin/systemctl preset rabbitmq-server.service >/dev/null 2>&1 || : 
fi
preuninstall scriptlet (using /bin/sh):
# We do not remove /var/log and /var/lib directories
# Leave rabbitmq user and group

if [ $1 -eq 0 ] ; then 
        # Package removal, not upgrade 
        /usr/bin/systemctl --no-reload disable rabbitmq-server.service > /dev/null 2>&1 || : 
        /usr/bin/systemctl stop rabbitmq-server.service > /dev/null 2>&1 || : 
fi 

# Clean out plugin activation state, both on uninstall and upgrade
rm -rf /var/lib/rabbitmq/plugins
for ext in rel script boot ; do
    rm -f /usr/lib/rabbitmq/lib/rabbitmq_server-3.3.5/ebin/rabbit.$ext
done

In comparison to other package such as openssh-server:
[stack@instack-prv images-7.1]$ sudo rpm -q --scripts openssh-server
preinstall scriptlet (using /bin/sh):
getent group sshd >/dev/null || groupadd -g 74 -r sshd || :
getent passwd sshd >/dev/null || \
  useradd -c "Privilege-separated SSH" -u 74 -g sshd \
  -s /sbin/nologin -r -d /var/empty/sshd sshd 2> /dev/null || :
postinstall scriptlet (using /bin/sh):

if [ $1 -eq 1 ] ; then
        # Initial installation  
        /usr/bin/systemctl preset sshd.service sshd.socket >/dev/null 2>&1 || :
fi
preuninstall scriptlet (using /bin/sh):

if [ $1 -eq 0 ] ; then
        # Package removal, not upgrade
        /usr/bin/systemctl --no-reload disable sshd.service sshd.socket > /dev/null 2>&1 || :
        /usr/bin/systemctl stop sshd.service sshd.socket > /dev/null 2>&1 || :
fi
postuninstall scriptlet (using /bin/sh):

/usr/bin/systemctl daemon-reload >/dev/null 2>&1 || :
if [ $1 -ge 1 ] ; then
        # Package upgrade, not uninstall
        /usr/bin/systemctl try-restart sshd.service >/dev/null 2>&1 || : 
fi

So we believe there is something wrong here.

*** This bug has been marked as a duplicate of bug 1264083 ***