FYI - I believe we're seeing: https://blog.sonatype.com/enhancing-ssl-security-and-http/2-support-for-central
------------ ivy-download: [get] Getting: https://repo1.maven.org/maven2/org/apache/ivy/ivy/2.4.0/ivy-2.4.0.jar [get] To: /home/jenkins/jenkins-slave/workspace/ZooKeeper_branch34/src/java/lib/ivy-2.4.0.jar [get] Error getting https://repo1.maven.org/maven2/org/apache/ivy/ivy/2.4.0/ivy-2.4.0.jar to /home/jenkins/jenkins-slave/workspace/ZooKeeper_branch34/src/java/lib/ivy-2.4.0.jar BUILD FAILED /home/jenkins/jenkins-slave/workspace/ZooKeeper_branch34/build.xml:392: javax.net.ssl.SSLException: Received fatal alert: protocol_version ----------------- It looks like we are ok with jdk 1.8+, and can mitigate 1.7, however 1.6 and earlier jdks have no option (aside turning off https usage which doesn't appeal to me). I can update the jenkins 1.7 based jobs. Thoughts on 1.6 and earlier? Perhaps we should use this as an opportunity to explicitly/officially discontinue support in the next version? http://zookeeper.apache.org/doc/r3.4.12/zookeeperAdmin.html#sc_requiredSoftware Patrick