ZooKeeper Patches

This release provides ZooKeeper 3.4.6 and the listed Apache patches.

• ZOOKEEPER-602: Log all exceptions not caught by ZK threads.
• ZOOKEEPER-1045: Support Quorum Peer mutual authentication via SASL.
• ZOOKEEPER-1342: quorum Listener & LearnerCnxAcceptor are missing thread names.
• ZOOKEEPER-1392: Request READ or ADMIN permission for getAcl().
• ZOOKEEPER-1907: Improve Thread handling.
• ZOOKEEPER-2029: Leader.LearnerCnxAcceptor should handle exceptions in run().
• ZOOKEEPER-2186: QuorumCnxManager#receiveConnection may crash with random input.
• ZOOKEEPER-2247: Zookeeper service becomes unavailable when leader fails to write transaction log.
• ZOOKEEPER-2360: Update commons collections version used by tests/releaseaudit.
• ZOOKEEPER-2498: Potential resource leak in C client when processing unexpected / out of order response.
• ZOOKEEPER-2594: Use TLS for downloading artifacts during build.
• ZOOKEEPER-2775: ZK Client not able to connect with Xid out of order error.
• ZOOKEEPER-3043: QuorumKerberosHostBasedAuthTest fails on Linux box: Unable to parse:includedir /etc/krb5.conf.d/.
• ZOOKEEPER-3253: Client should not send requests with cxid=-4, -2, or -1.