GitHub user gnethercutt opened a pull request: https://github.com/apache/zookeeper/pull/83
enable TCP keepalive for the leadership election/quorum socket Use TCP keep-alives for election/quorum peer connections. This is the shortest edit distance to address [ZOOKEEPER-1748](https://issues.apache.org/jira/browse/ZOOKEEPER-1748), and is required to avoid silent packet delivery failures for a long-lived connection in AWS (amongst other environments). See also: - [VPC security group connection tracking](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html#security-group-connection-tracking) - [Using TCP keepalives](http://tldp.org/HOWTO/TCP-Keepalive-HOWTO/usingkeepalive.html) - [Zookeeper internals](https://zookeeper.apache.org/doc/r3.4.8/zookeeperInternals.html) You can merge this pull request into a Git repository by running: $ git pull https://github.com/gnethercutt/zookeeper election_tcp_keepalive Alternatively you can review and apply these changes as the patch at: https://github.com/apache/zookeeper/pull/83.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #83 ---- commit bcab41003d91dc121e368337317710c2434bece8 Author: Glenn Nethercutt <glenn.netherc...@inin.com> Date: 2016-09-28T18:22:41Z enable TCP keepalive for the leadership election/quorum socket ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---