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Trustin Lee a517cce92f Do not send duplicate DNS queries when the same query is in progress already
Related issue: #5179

Motivation:

When you attempt to make a lot of connection attempts to the same target
host at the same time and our DNS resolver does not have a record for it
in the cache, the DNS resolver will send as many DNS queries as the
number of connection attempts.

As a result, DNS server will reject or drop the requests, making the
name resolution attempt fail.

Modifications:

- Add InflightNameResolver that keeps the list of name resolution
  queries and subscribes to the future of the matching query instead of
  sending a duplicate query.

Result:

- The AddressResolvers created by DnsAddressResolverGroup do not send
  duplicate DNS queries anymore
2016-05-17 15:07:36 +02:00
all [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
buffer Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-dns Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-haproxy [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
codec-http Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-http2 Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-memcache Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-mqtt Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-redis Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-smtp Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-socks Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-stomp Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
codec-xml Update dependencies 2016-04-14 11:05:53 +02:00
common Add DomainNameMapping.entries to allow retrieving the domain match lists 2016-05-17 09:47:45 +02:00
example Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
handler Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
handler-proxy [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
license added support for Protobuf codec nano runtime 2016-01-19 21:39:17 +01:00
microbench Remove ChannelHandlerInvoker 2016-05-17 11:14:00 +02:00
resolver Change hosts file resolver to be case-insensitive 2016-05-10 08:57:48 +02:00
resolver-dns Do not send duplicate DNS queries when the same query is in progress already 2016-05-17 15:07:36 +02:00
tarball [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
testsuite Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
testsuite-osgi [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
transport [#5104] Fix possible deadlock in DefaultChannelPipeline 2016-05-17 14:24:46 +02:00
transport-native-epoll EpollEventLoop ensures that all submitted tasks are executed immediately. 2016-05-17 07:43:45 +02:00
transport-rxtx [maven-release-plugin] prepare for next development iteration 2016-04-10 08:37:18 +02:00
transport-sctp Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
transport-udt Make retained derived buffers recyclable 2016-05-17 11:16:13 +02:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitignore Add JVM crash logs to .gitignore 2014-05-18 21:36:54 +09:00
.travis.yml Travis CI branch whitelisting 2013-03-11 09:55:43 +09:00
CONTRIBUTING.md Move the pull request guide to the developer guide 2014-03-12 13:13:58 +09:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
NOTICE.txt added support for Protobuf codec nano runtime 2016-01-19 21:39:17 +01:00
pom.xml Upgrade to netty-tcnative-1.1.33.Fork16 2016-05-13 08:40:37 +02:00
README.md Updating Branches to look section to match the current branching structure of the project 2016-03-10 22:08:01 +01:00
run-example.sh Add an example client for codec-redis 2016-04-23 11:18:12 -07:00

Netty Project

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

How to build

For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.

You require the following to build Netty:

Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.

Branches to look

Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.