Comment 4 for bug 1470984

Hi sachin,
My findings:
Suppose we have 1000 virtual networks. when schema restart, it adds this 1000 virtual networks into current_network_set.
Then iterate through current_network_set and construct ACL entries and connectivity table, right?
During this current_network_set iteration, if user delete a virtual network, schema fails to query from Cassandra and end-up with this error.