Return the given count of recent failed DNS queries from DNS forwarder.
Since the DNS forwarder is running in Acitve/Standby HA mode on transport
nodes, the given count of queries will be returned from each nodes. Hence
the total queries returned could be doubled.
If no count is specified, 100 recent failed queries are returned. If the
recent failures is less than the given count, all the failures will be
returned. The maximum count is 1,000.
The array of failed DNS queries on active and standby transport node
The array of failed DNS queries on active and standby transport node.
If there is no standby node, the failed queries on standby node will
not be present.