Comment 4 for bug 1450683

In addition to above explanation broadly this can happen for two reasons:
1) CN had issue, 2) Tor-agent for 11.1.7.2 didnt send subscription.
Since supervisor-vrouter was restarted there is no clue to see which of the above happened.

Will recommend following if this issue is seen again:
1) Route table introspect frm all tor-agent and vrouter-agent(TSN).
2) Route table from CN.
3) XMPP trace messages (XmppMessageTrace)