Trustin Lee 120ffaf880 Use separate query ID space for different DNS servers ... Related: #3972 Motivation: DnsNameResolver limits the number of concurrent in-progress DNS queries to 65536 regardless the number of DNS servers it communicates with. When the number of available DNS servers are more than just one, we end up using much less (65536 / numDnsServers) query IDs per DNS server, which is non-optimal. Modifications: - Replace the query ID and context management with DnsQueryContextManager - Eash DNS server gets its own query ID space Result: Much bigger query ID space, and thus there's less chance of getting the 'query ID space exhaustion' error		2015-11-09 15:25:13 -08:00
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main/java/io/netty/resolver/dns	Use separate query ID space for different DNS servers	2015-11-09 15:25:13 -08:00
test	[#4289] Use a mock DNS Server for dns tests.	2015-10-10 20:27:34 +02:00