Release Notes - ZooKeeper - Version 3.6.2

Bug

• ZOOKEEPER-3112 - fd leak due to UnresolvedAddressException on connect.
• ZOOKEEPER-3215 - Handle Java 9/11 additions of covariant return types to java.nio.ByteBuffer methods
• ZOOKEEPER-3772 - JettyAdminServer should not allow HTTP TRACE method
• ZOOKEEPER-3792 - Reconcile document site in 3.5.7 & 3.6.0
• ZOOKEEPER-3801 - Fix Jenkins link in pom
• ZOOKEEPER-3814 - ZooKeeper config propagates even with disabled dynamic reconfig
• ZOOKEEPER-3818 - fix zkServer.sh status command to support SSL-only server
• ZOOKEEPER-3829 - Zookeeper refuses request after node expansion
• ZOOKEEPER-3830 - After add a new node, zookeeper cluster won't commit any proposal if this new node is leader
• ZOOKEEPER-3832 - ZKHostnameVerifier rejects valid certificates with subjectAltNames
• ZOOKEEPER-3842 - Rolling scale up of zookeeper cluster does not work with reconfigEnabled=false
• ZOOKEEPER-3857 - ZooKeeper 3.6 doesn't build after Curator test committed
• ZOOKEEPER-3865 - fix backward-compatibility for ZooKeeperServer constructor
• ZOOKEEPER-3876 - zkServer.sh status command fails when IPV6 is configured
• ZOOKEEPER-3878 - Client connection fails if IPV6 is not enclosed in square brackets
• ZOOKEEPER-3885 - zoo_aremove_watches segfault: zk_hashtable needs locking!
• ZOOKEEPER-3895 - Client side NullPointerException in case of empty Multi operation
• ZOOKEEPER-3905 - Race condition causes sessions to be created for clients even though their certificate authentication has failed

Improvement

• ZOOKEEPER-3678 - Remove Redundant GroupID from Maven POMs
• ZOOKEEPER-3679 - Upgrade maven-compiler-plugin For ZooKeeper-jute
• ZOOKEEPER-3761 - upgrade JLine jar dependency
• ZOOKEEPER-3790 - zkpython: Minor compilation and testing issues
• ZOOKEEPER-3831 - Add a test that does a minimal validation of Apache Curator
• ZOOKEEPER-3834 - Do Not Set Explicit Test Includes in POM
• ZOOKEEPER-3844 - Add useful metrics for ZK servers
• ZOOKEEPER-3893 - Enhance documentation for property ssl.clientAuth
• ZOOKEEPER-3913 - Upgrade to Netty 4.1.50.Final

Task

• ZOOKEEPER-3817 - owasp failing due to CVE-2020-9488
• ZOOKEEPER-3896 - Migrate Jenkins jobs to ci-hadoop.apache.org
• ZOOKEEPER-3924 - Netty and JLine Licenses are inconsistent with jars in the binary tarball in 3.6.2 rc0

Sub-task

• ZOOKEEPER-3845 - Add metric JVM_PAUSE_TIME
• ZOOKEEPER-3846 - Add a couple TLS related metrics
• ZOOKEEPER-3847 - Add a couple metrics to help track Netty memory usage
• ZOOKEEPER-3856 - Add a couple metrics to track inflight diff syncs and snap syncs
• ZOOKEEPER-3813 - FileChangeWatcherTest is broken on Mac