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From eolive...@apache.org
Subject [zookeeper] branch branch-3.6 updated: ZooKeeper 3.6.0 release notes draft
Date Thu, 19 Dec 2019 23:15:12 GMT
This is an automated email from the ASF dual-hosted git repository.

eolivelli pushed a commit to branch branch-3.6
in repository https://gitbox.apache.org/repos/asf/zookeeper.git


The following commit(s) were added to refs/heads/branch-3.6 by this push:
     new a21632b  ZooKeeper 3.6.0 release notes draft
a21632b is described below

commit a21632bf3b38fbf41fe3b0aba9b801dc31f8c12e
Author: Enrico Olivelli <eolivelli@apache.org>
AuthorDate: Fri Dec 20 00:14:03 2019 +0100

    ZooKeeper 3.6.0 release notes draft
---
 .../src/main/resources/markdown/releasenotes.md    | 964 +++++++++++++++------
 1 file changed, 723 insertions(+), 241 deletions(-)

diff --git a/zookeeper-docs/src/main/resources/markdown/releasenotes.md b/zookeeper-docs/src/main/resources/markdown/releasenotes.md
index 67dd47a..522e8ba 100644
--- a/zookeeper-docs/src/main/resources/markdown/releasenotes.md
+++ b/zookeeper-docs/src/main/resources/markdown/releasenotes.md
@@ -14,254 +14,736 @@ See the License for the specific language governing permissions and
 limitations under the License.
 //-->
 
-# ZooKeeper 3.0.0 Release Notes
 
-* [Migration Instructions when Upgrading to 3.0.0](#migration)
-    * [Migrating Client Code](#migration_code)
-        * [Watch Management](#Watch+Management)
-        * [Java API](#Java+API)
-        * [C API](#C+API)
-    * [Migrating Server Data](#migration_data)
-    * [Migrating Server Configuration](#migration_config)
-* [Changes Since ZooKeeper 2.2.1](#changes)
+# Release Notes - ZooKeeper - Version 3.6.0
+
+## New Feature
+
+* [ZOOKEEPER-27](https://issues.apache.org/jira/browse/ZOOKEEPER-27) - Unique DB identifiers for servers and clients
+* [ZOOKEEPER-1112](https://issues.apache.org/jira/browse/ZOOKEEPER-1112) - Add support for C client for SASL authentication
+* [ZOOKEEPER-1260](https://issues.apache.org/jira/browse/ZOOKEEPER-1260) - Audit logging in ZooKeeper servers.
+* [ZOOKEEPER-1634](https://issues.apache.org/jira/browse/ZOOKEEPER-1634) - A new feature proposal to ZooKeeper: authentication enforcement
+* [ZOOKEEPER-1703](https://issues.apache.org/jira/browse/ZOOKEEPER-1703) - Please add instructions for running the tutorial
+* [ZOOKEEPER-1962](https://issues.apache.org/jira/browse/ZOOKEEPER-1962) - Add a CLI command to recursively list a znode and children
+* [ZOOKEEPER-2163](https://issues.apache.org/jira/browse/ZOOKEEPER-2163) - Introduce new ZNode type: container
+* [ZOOKEEPER-2169](https://issues.apache.org/jira/browse/ZOOKEEPER-2169) - Enable creation of nodes with TTLs
+* [ZOOKEEPER-2875](https://issues.apache.org/jira/browse/ZOOKEEPER-2875) - Add ant task for running OWASP dependency report
+* [ZOOKEEPER-2933](https://issues.apache.org/jira/browse/ZOOKEEPER-2933) - Ability to monitor the jute.maxBuffer usage in real-time
+* [ZOOKEEPER-2994](https://issues.apache.org/jira/browse/ZOOKEEPER-2994) - Tool required to recover log and snapshot entries with CRC errors
+* [ZOOKEEPER-3066](https://issues.apache.org/jira/browse/ZOOKEEPER-3066) - Expose on JMX of Followers the id of the current leader
+* [ZOOKEEPER-3091](https://issues.apache.org/jira/browse/ZOOKEEPER-3091) - Prometheus.io integration
+* [ZOOKEEPER-3092](https://issues.apache.org/jira/browse/ZOOKEEPER-3092) - Pluggable metrics system for ZooKeeper
+* [ZOOKEEPER-3114](https://issues.apache.org/jira/browse/ZOOKEEPER-3114) - Built-in data consistency check inside ZooKeeper
+* [ZOOKEEPER-3137](https://issues.apache.org/jira/browse/ZOOKEEPER-3137) - add a utility to truncate logs to a zxid
+* [ZOOKEEPER-3140](https://issues.apache.org/jira/browse/ZOOKEEPER-3140) - Allow Followers to host Observers
+* [ZOOKEEPER-3160](https://issues.apache.org/jira/browse/ZOOKEEPER-3160) - Custom User SSLContext
+* [ZOOKEEPER-3167](https://issues.apache.org/jira/browse/ZOOKEEPER-3167) - add an API and the corresponding CLI to get total count of recursive sub nodes under a specific path
+* [ZOOKEEPER-3209](https://issues.apache.org/jira/browse/ZOOKEEPER-3209) - New `getEphemerals` api to get all the ephemeral nodes created by the session
+* [ZOOKEEPER-3244](https://issues.apache.org/jira/browse/ZOOKEEPER-3244) - Add option to snapshot based on log size
+* [ZOOKEEPER-3269](https://issues.apache.org/jira/browse/ZOOKEEPER-3269) - Testable facade would benefit from a queueEvent() method
+* [ZOOKEEPER-3311](https://issues.apache.org/jira/browse/ZOOKEEPER-3311) - Allow a delay to the transaction log flush 
+* [ZOOKEEPER-3331](https://issues.apache.org/jira/browse/ZOOKEEPER-3331) - Automatically add IP authorization for Netty connections
+* [ZOOKEEPER-3343](https://issues.apache.org/jira/browse/ZOOKEEPER-3343) - Add a new doc: zookeeperTools.md
+* [ZOOKEEPER-3344](https://issues.apache.org/jira/browse/ZOOKEEPER-3344) - write a new script:zkSnapShotToolkit.sh to encapsulate SnapshotFormatter and doc the usage
+* [ZOOKEEPER-3371](https://issues.apache.org/jira/browse/ZOOKEEPER-3371) - Port unification for admin server
+* [ZOOKEEPER-3447](https://issues.apache.org/jira/browse/ZOOKEEPER-3447) - add a doc: zookeeperMonitor.md
+* [ZOOKEEPER-3657](https://issues.apache.org/jira/browse/ZOOKEEPER-3657) - Implementing snapshot schedule to avoid high latency issue due to disk contention
+
+## Improvement
+
+* [ZOOKEEPER-261](https://issues.apache.org/jira/browse/ZOOKEEPER-261) - Reinitialized servers should not participate in leader election
+* [ZOOKEEPER-761](https://issues.apache.org/jira/browse/ZOOKEEPER-761) - Remove *synchronous* calls from the *single-threaded* C clieant API, since they are documented not to work
+* [ZOOKEEPER-974](https://issues.apache.org/jira/browse/ZOOKEEPER-974) - Configurable listen socket backlog for the client port
+* [ZOOKEEPER-1177](https://issues.apache.org/jira/browse/ZOOKEEPER-1177) - Enabling a large number of watches for a large number of clients
+* [ZOOKEEPER-1416](https://issues.apache.org/jira/browse/ZOOKEEPER-1416) - Persistent Recursive Watch
+* [ZOOKEEPER-1423](https://issues.apache.org/jira/browse/ZOOKEEPER-1423) - 4lw and jmx should expose the size of the datadir/datalogdir
+* [ZOOKEEPER-1425](https://issues.apache.org/jira/browse/ZOOKEEPER-1425) - add version command to the zookeeper client shell
+* [ZOOKEEPER-1426](https://issues.apache.org/jira/browse/ZOOKEEPER-1426) - add version command to the zookeeper server
+* [ZOOKEEPER-1467](https://issues.apache.org/jira/browse/ZOOKEEPER-1467) - Make server principal configurable at client side.
+* [ZOOKEEPER-1504](https://issues.apache.org/jira/browse/ZOOKEEPER-1504) - Multi-thread NIOServerCnxn
+* [ZOOKEEPER-1506](https://issues.apache.org/jira/browse/ZOOKEEPER-1506) - Re-try DNS hostname -&gt; IP resolution if node connection fails
+* [ZOOKEEPER-1525](https://issues.apache.org/jira/browse/ZOOKEEPER-1525) - Plumb ZooKeeperServer object into auth plugins
+* [ZOOKEEPER-1651](https://issues.apache.org/jira/browse/ZOOKEEPER-1651) - Add support for compressed snapshot
+* [ZOOKEEPER-1748](https://issues.apache.org/jira/browse/ZOOKEEPER-1748) - TCP keepalive for leader election connections
+* [ZOOKEEPER-1907](https://issues.apache.org/jira/browse/ZOOKEEPER-1907) - Improve Thread handling
+* [ZOOKEEPER-1908](https://issues.apache.org/jira/browse/ZOOKEEPER-1908) - setAcl should be have a recursive function
+* [ZOOKEEPER-1948](https://issues.apache.org/jira/browse/ZOOKEEPER-1948) - Enable JMX remote monitoring
+* [ZOOKEEPER-1963](https://issues.apache.org/jira/browse/ZOOKEEPER-1963) - Make JDK 7 the minimum requirement for Zookeeper
+* [ZOOKEEPER-1994](https://issues.apache.org/jira/browse/ZOOKEEPER-1994) - Backup config files.
+* [ZOOKEEPER-2024](https://issues.apache.org/jira/browse/ZOOKEEPER-2024) - Major throughput improvement with mixed workloads
+* [ZOOKEEPER-2040](https://issues.apache.org/jira/browse/ZOOKEEPER-2040) - Server to log underlying cause of SASL connection problems
+* [ZOOKEEPER-2079](https://issues.apache.org/jira/browse/ZOOKEEPER-2079) - Stop daemon with &quot;kill&quot; rather than &quot;kill -9&quot;
+* [ZOOKEEPER-2084](https://issues.apache.org/jira/browse/ZOOKEEPER-2084) - Document local session parameters
+* [ZOOKEEPER-2087](https://issues.apache.org/jira/browse/ZOOKEEPER-2087) - Few UX improvements in ZooInspector
+* [ZOOKEEPER-2098](https://issues.apache.org/jira/browse/ZOOKEEPER-2098) - QuorumCnxManager: use BufferedOutputStream for initial msg
+* [ZOOKEEPER-2107](https://issues.apache.org/jira/browse/ZOOKEEPER-2107) - zookeeper client should support custom HostProviders
+* [ZOOKEEPER-2110](https://issues.apache.org/jira/browse/ZOOKEEPER-2110) - Typo fixes in the ZK documentation
+* [ZOOKEEPER-2126](https://issues.apache.org/jira/browse/ZOOKEEPER-2126) - Improve exit log messsage of EventThread and SendThread by adding SessionId
+* [ZOOKEEPER-2139](https://issues.apache.org/jira/browse/ZOOKEEPER-2139) - Support multiple ZooKeeper client, with different configurations, in a single JVM
+* [ZOOKEEPER-2140](https://issues.apache.org/jira/browse/ZOOKEEPER-2140) - NettyServerCnxn and NIOServerCnxn code should be improved
+* [ZOOKEEPER-2149](https://issues.apache.org/jira/browse/ZOOKEEPER-2149) - Logging of client address when socket connection established
+* [ZOOKEEPER-2176](https://issues.apache.org/jira/browse/ZOOKEEPER-2176) - Unclear error message should be info not error
+* [ZOOKEEPER-2179](https://issues.apache.org/jira/browse/ZOOKEEPER-2179) - Typo in Watcher.java
+* [ZOOKEEPER-2183](https://issues.apache.org/jira/browse/ZOOKEEPER-2183) - Concurrent Testing Processes and Port Assignments
+* [ZOOKEEPER-2185](https://issues.apache.org/jira/browse/ZOOKEEPER-2185) - Run server with -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError=&#39;kill %p&#39;.
+* [ZOOKEEPER-2191](https://issues.apache.org/jira/browse/ZOOKEEPER-2191) - Continue supporting prior Ant versions that don&#39;t implement the threads attribute for the JUnit task.
+* [ZOOKEEPER-2194](https://issues.apache.org/jira/browse/ZOOKEEPER-2194) - Let DataNode.getChildren() return an unmodifiable view of its children set
+* [ZOOKEEPER-2205](https://issues.apache.org/jira/browse/ZOOKEEPER-2205) - Log type of unexpected quorum packet in learner handler loop
+* [ZOOKEEPER-2206](https://issues.apache.org/jira/browse/ZOOKEEPER-2206) - Add missing packet types to LearnerHandler.packetToString()
+* [ZOOKEEPER-2207](https://issues.apache.org/jira/browse/ZOOKEEPER-2207) - Enhance error logs with LearnerHandler.packetToString()
+* [ZOOKEEPER-2208](https://issues.apache.org/jira/browse/ZOOKEEPER-2208) - Log type of unexpected quorum packet in observer loop
+* [ZOOKEEPER-2214](https://issues.apache.org/jira/browse/ZOOKEEPER-2214) - Findbugs warning: LearnerHandler.packetToString Dead store to local variable
+* [ZOOKEEPER-2223](https://issues.apache.org/jira/browse/ZOOKEEPER-2223) - support method-level JUnit testcase
+* [ZOOKEEPER-2238](https://issues.apache.org/jira/browse/ZOOKEEPER-2238) - Support limiting the maximum number of connections/clients to a zookeeper server.
+* [ZOOKEEPER-2240](https://issues.apache.org/jira/browse/ZOOKEEPER-2240) - Make the three-node minimum more explicit in documentation and on website
+* [ZOOKEEPER-2270](https://issues.apache.org/jira/browse/ZOOKEEPER-2270) - Allow MBeanRegistry to be overridden for better unit tests
+* [ZOOKEEPER-2306](https://issues.apache.org/jira/browse/ZOOKEEPER-2306) - Remove file delete duplicate  code from test code
+* [ZOOKEEPER-2315](https://issues.apache.org/jira/browse/ZOOKEEPER-2315) - Change client connect zk service timeout log level from Info to Warn level
+* [ZOOKEEPER-2326](https://issues.apache.org/jira/browse/ZOOKEEPER-2326) - Include connected server address:port in log
+* [ZOOKEEPER-2359](https://issues.apache.org/jira/browse/ZOOKEEPER-2359) - ZooKeeper client has unnecessary logs for watcher removal errors
+* [ZOOKEEPER-2368](https://issues.apache.org/jira/browse/ZOOKEEPER-2368) - Client watches are not disconnected on close
+* [ZOOKEEPER-2373](https://issues.apache.org/jira/browse/ZOOKEEPER-2373) - Licenses section missing from pom file
+* [ZOOKEEPER-2378](https://issues.apache.org/jira/browse/ZOOKEEPER-2378) - upgrade ivy to recent version
+* [ZOOKEEPER-2392](https://issues.apache.org/jira/browse/ZOOKEEPER-2392) - Update netty to 3.7.1.Final
+* [ZOOKEEPER-2402](https://issues.apache.org/jira/browse/ZOOKEEPER-2402) - Document client side properties
+* [ZOOKEEPER-2410](https://issues.apache.org/jira/browse/ZOOKEEPER-2410) - add time unit to &#39;ELECTION TOOK&#39; log.info message
+* [ZOOKEEPER-2433](https://issues.apache.org/jira/browse/ZOOKEEPER-2433) - ZooKeeperSaslServer: allow user principals in subject
+* [ZOOKEEPER-2479](https://issues.apache.org/jira/browse/ZOOKEEPER-2479) - Add &#39;electionTimeTaken&#39; value in LeaderMXBean and FollowerMXBean
+* [ZOOKEEPER-2489](https://issues.apache.org/jira/browse/ZOOKEEPER-2489) - Upgrade Jetty dependency to a recent stable release version.
+* [ZOOKEEPER-2505](https://issues.apache.org/jira/browse/ZOOKEEPER-2505) - Use shared library instead of static library in C client unit test
+* [ZOOKEEPER-2507](https://issues.apache.org/jira/browse/ZOOKEEPER-2507) - C unit test improvement: line break between &#39;ZooKeeper server started&#39; and &#39;Running&#39;
+* [ZOOKEEPER-2511](https://issues.apache.org/jira/browse/ZOOKEEPER-2511) - Implement AutoCloseable in ZooKeeper.java
+* [ZOOKEEPER-2557](https://issues.apache.org/jira/browse/ZOOKEEPER-2557) - Update gitignore to account for other file extensions
+* [ZOOKEEPER-2594](https://issues.apache.org/jira/browse/ZOOKEEPER-2594) - Use TLS for downloading artifacts during build
+* [ZOOKEEPER-2620](https://issues.apache.org/jira/browse/ZOOKEEPER-2620) - Add comments to testReadOnlySnapshotDir and testReadOnlyTxnLogDir indicating that the tests will fail when run as root
+* [ZOOKEEPER-2630](https://issues.apache.org/jira/browse/ZOOKEEPER-2630) - Use interface type instead of implementation type when appropriate.
+* [ZOOKEEPER-2632](https://issues.apache.org/jira/browse/ZOOKEEPER-2632) - Add option to inform JIRA_PASSWORD at CLI prompt 
+* [ZOOKEEPER-2638](https://issues.apache.org/jira/browse/ZOOKEEPER-2638) - ZooKeeper should log which serverCnxnFactory is used during startup
+* [ZOOKEEPER-2641](https://issues.apache.org/jira/browse/ZOOKEEPER-2641) - AvgRequestLatency metric improves to be more accurate
+* [ZOOKEEPER-2655](https://issues.apache.org/jira/browse/ZOOKEEPER-2655) - Improve NIOServerCnxn#isZKServerRunning to reflect the semantics correctly
+* [ZOOKEEPER-2662](https://issues.apache.org/jira/browse/ZOOKEEPER-2662) - Export a metric for txn log sync times
+* [ZOOKEEPER-2672](https://issues.apache.org/jira/browse/ZOOKEEPER-2672) - Remove CHANGE.txt
+* [ZOOKEEPER-2682](https://issues.apache.org/jira/browse/ZOOKEEPER-2682) - Make it optional to fail build on test failure
+* [ZOOKEEPER-2697](https://issues.apache.org/jira/browse/ZOOKEEPER-2697) - Handle graceful stop of ZookKeeper client
+* [ZOOKEEPER-2744](https://issues.apache.org/jira/browse/ZOOKEEPER-2744) - Typos in the comments of ZooKeeper class
+* [ZOOKEEPER-2767](https://issues.apache.org/jira/browse/ZOOKEEPER-2767) - Correct the exception messages in X509Util if truststore location or password is not configured
+* [ZOOKEEPER-2788](https://issues.apache.org/jira/browse/ZOOKEEPER-2788) - The define of MAX_CONNECTION_ATTEMPTS in QuorumCnxManager.java seems useless, should it be removed?
+* [ZOOKEEPER-2815](https://issues.apache.org/jira/browse/ZOOKEEPER-2815) - 1. Using try clause to close resource; 2. Others code refactoring for PERSISTENCE module
+* [ZOOKEEPER-2816](https://issues.apache.org/jira/browse/ZOOKEEPER-2816) - Code refactoring for `ZK_SERVER` module
+* [ZOOKEEPER-2824](https://issues.apache.org/jira/browse/ZOOKEEPER-2824) - `FileChannel#size` info should be added to `FileTxnLog#commit` to solve the confuse that reason is too large log or too busy disk I/O
+* [ZOOKEEPER-2825](https://issues.apache.org/jira/browse/ZOOKEEPER-2825) - 1. Remove unnecessary import; 2. `contains` instead of `indexOf &gt; -1` for more readable; 3. Standardize `StringBuilder#append` usage for CLIENT module
+* [ZOOKEEPER-2826](https://issues.apache.org/jira/browse/ZOOKEEPER-2826) - Code refactoring for `CLI` module
+* [ZOOKEEPER-2829](https://issues.apache.org/jira/browse/ZOOKEEPER-2829) - Interface usability / compatibility improvements through Java annotation.
+* [ZOOKEEPER-2856](https://issues.apache.org/jira/browse/ZOOKEEPER-2856) - ZooKeeperSaslClient#respondToServer should log exception message of SaslException
+* [ZOOKEEPER-2864](https://issues.apache.org/jira/browse/ZOOKEEPER-2864) - Add script to run a java api compatibility tool
+* [ZOOKEEPER-2865](https://issues.apache.org/jira/browse/ZOOKEEPER-2865) - Reconfig Causes Inconsistent Configuration file among the nodes
+* [ZOOKEEPER-2870](https://issues.apache.org/jira/browse/ZOOKEEPER-2870) - Improve the efficiency of AtomicFileOutputStream
+* [ZOOKEEPER-2880](https://issues.apache.org/jira/browse/ZOOKEEPER-2880) - Rename README.txt to README.md
+* [ZOOKEEPER-2887](https://issues.apache.org/jira/browse/ZOOKEEPER-2887) - define dependency versions in build.xml to be easily overridden in build.properties
+* [ZOOKEEPER-2892](https://issues.apache.org/jira/browse/ZOOKEEPER-2892) - Improve lazy initialize and close stream for `PrepRequestProcessor`
+* [ZOOKEEPER-2896](https://issues.apache.org/jira/browse/ZOOKEEPER-2896) - Remove unused imports from org.apache.zookeeper.test.CreateTest.java
+* [ZOOKEEPER-2904](https://issues.apache.org/jira/browse/ZOOKEEPER-2904) - Remove unused imports from org.apache.zookeeper.server.quorum.WatchLeakTest
+* [ZOOKEEPER-2915](https://issues.apache.org/jira/browse/ZOOKEEPER-2915) - Use &quot;strict&quot; conflict management in ivy
+* [ZOOKEEPER-2950](https://issues.apache.org/jira/browse/ZOOKEEPER-2950) - Add keys for the Zxid from the stat command to check_zookeeper.py
+* [ZOOKEEPER-2952](https://issues.apache.org/jira/browse/ZOOKEEPER-2952) - Upgrade third party libraries to address vulnerabilities
+* [ZOOKEEPER-2967](https://issues.apache.org/jira/browse/ZOOKEEPER-2967) - Add check to validate dataDir and dataLogDir parameters at startup
+* [ZOOKEEPER-2999](https://issues.apache.org/jira/browse/ZOOKEEPER-2999) - CMake build should use target-level commands
+* [ZOOKEEPER-3012](https://issues.apache.org/jira/browse/ZOOKEEPER-3012) - Fix unit test: testDataDirAndDataLogDir should not use hardcode test folders
+* [ZOOKEEPER-3019](https://issues.apache.org/jira/browse/ZOOKEEPER-3019) - Add a metric to track number of slow fsyncs
+* [ZOOKEEPER-3020](https://issues.apache.org/jira/browse/ZOOKEEPER-3020) - Review of SyncRequestProcessor
+* [ZOOKEEPER-3037](https://issues.apache.org/jira/browse/ZOOKEEPER-3037) - Add JvmPauseMonitor to ZooKeeper
+* [ZOOKEEPER-3043](https://issues.apache.org/jira/browse/ZOOKEEPER-3043) - QuorumKerberosHostBasedAuthTest fails on Linux box: Unable to parse:includedir /etc/krb5.conf.d/
+* [ZOOKEEPER-3044](https://issues.apache.org/jira/browse/ZOOKEEPER-3044) - OutOfMemoryError exceptions in Jenkins when running tests
+* [ZOOKEEPER-3063](https://issues.apache.org/jira/browse/ZOOKEEPER-3063) - Track outstanding changes with ArrayDeque
+* [ZOOKEEPER-3068](https://issues.apache.org/jira/browse/ZOOKEEPER-3068) - Improve C client logging of IPv6 hosts
+* [ZOOKEEPER-3071](https://issues.apache.org/jira/browse/ZOOKEEPER-3071) - Add a config parameter to control transaction log size
+* [ZOOKEEPER-3077](https://issues.apache.org/jira/browse/ZOOKEEPER-3077) - Build native C library outside of source directory
+* [ZOOKEEPER-3078](https://issues.apache.org/jira/browse/ZOOKEEPER-3078) - Remove unused print_completion_queue function
+* [ZOOKEEPER-3083](https://issues.apache.org/jira/browse/ZOOKEEPER-3083) - Remove some redundant and noisy log lines
+* [ZOOKEEPER-3084](https://issues.apache.org/jira/browse/ZOOKEEPER-3084) - Exit when ZooKeeper cannot bind to the leader election port
+* [ZOOKEEPER-3085](https://issues.apache.org/jira/browse/ZOOKEEPER-3085) - Define constant exit code and add documents
+* [ZOOKEEPER-3094](https://issues.apache.org/jira/browse/ZOOKEEPER-3094) - Make BufferSizeTest reliable
+* [ZOOKEEPER-3095](https://issues.apache.org/jira/browse/ZOOKEEPER-3095) - Connect string fix for non-existent hosts
+* [ZOOKEEPER-3097](https://issues.apache.org/jira/browse/ZOOKEEPER-3097) - Use Runnable instead of Thread for working items in WorkerService to improve the throughput of CommitProcessor
+* [ZOOKEEPER-3098](https://issues.apache.org/jira/browse/ZOOKEEPER-3098) - Add additional server metrics
+* [ZOOKEEPER-3109](https://issues.apache.org/jira/browse/ZOOKEEPER-3109) - Avoid long unavailable time due to voter changed mind when activating the leader during election
+* [ZOOKEEPER-3110](https://issues.apache.org/jira/browse/ZOOKEEPER-3110) - Improve the closeSession throughput in PrepRequestProcessor
+* [ZOOKEEPER-3116](https://issues.apache.org/jira/browse/ZOOKEEPER-3116) - Make the DataTree.approximateDataSize more efficient
+* [ZOOKEEPER-3124](https://issues.apache.org/jira/browse/ZOOKEEPER-3124) - Add the correct comment to show why we need the special logic to handle cversion and pzxid
+* [ZOOKEEPER-3142](https://issues.apache.org/jira/browse/ZOOKEEPER-3142) - Extend SnapshotFormatter to dump data in json format
+* [ZOOKEEPER-3146](https://issues.apache.org/jira/browse/ZOOKEEPER-3146) - Limit the maximum client connections per IP in NettyServerCnxnFactory
+* [ZOOKEEPER-3152](https://issues.apache.org/jira/browse/ZOOKEEPER-3152) - Port ZK netty stack to netty 4
+* [ZOOKEEPER-3159](https://issues.apache.org/jira/browse/ZOOKEEPER-3159) - Flaky: ClientRequestTimeoutTest.testClientRequestTimeout
+* [ZOOKEEPER-3161](https://issues.apache.org/jira/browse/ZOOKEEPER-3161) - Refactor QuorumPeerMainTest.java: move commonly used functions to base class
+* [ZOOKEEPER-3163](https://issues.apache.org/jira/browse/ZOOKEEPER-3163) - Use session map to improve the performance when closing session in Netty
+* [ZOOKEEPER-3177](https://issues.apache.org/jira/browse/ZOOKEEPER-3177) - Refactor request throttle logic in NIO and Netty to keep the same behavior and make the code easier to maintain
+* [ZOOKEEPER-3179](https://issues.apache.org/jira/browse/ZOOKEEPER-3179) - Add snapshot compression to reduce the disk IO
+* [ZOOKEEPER-3180](https://issues.apache.org/jira/browse/ZOOKEEPER-3180) - Add response cache to improve the throughput of read heavy traffic 
+* [ZOOKEEPER-3183](https://issues.apache.org/jira/browse/ZOOKEEPER-3183) - Interrupting or  notifying the WatcherCleaner  thread during shutdown if it is waiting for dead watchers get certain number(watcherCleanThreshold) and also stop adding incoming  deadWatcher to deadWatchersList when shutdown is initiated.
+* [ZOOKEEPER-3188](https://issues.apache.org/jira/browse/ZOOKEEPER-3188) - Improve resilience to network
+* [ZOOKEEPER-3190](https://issues.apache.org/jira/browse/ZOOKEEPER-3190) - Spell check on the Zookeeper server files
+* [ZOOKEEPER-3195](https://issues.apache.org/jira/browse/ZOOKEEPER-3195) - TLS - disable client-initiated renegotiation
+* [ZOOKEEPER-3203](https://issues.apache.org/jira/browse/ZOOKEEPER-3203) - Tracking and exposing the non voting followers in ZK
+* [ZOOKEEPER-3208](https://issues.apache.org/jira/browse/ZOOKEEPER-3208) - Remove the SSLTest.java.orig introduced in ZOOKEEPER-3032
+* [ZOOKEEPER-3216](https://issues.apache.org/jira/browse/ZOOKEEPER-3216) - Make init/sync limit tunable via JMX
+* [ZOOKEEPER-3219](https://issues.apache.org/jira/browse/ZOOKEEPER-3219) - Fix flaky FileChangeWatcherTest
+* [ZOOKEEPER-3228](https://issues.apache.org/jira/browse/ZOOKEEPER-3228) - [TLS] Fix key usage extension in test certs
+* [ZOOKEEPER-3232](https://issues.apache.org/jira/browse/ZOOKEEPER-3232) - make the log of notification about LE more readable
+* [ZOOKEEPER-3234](https://issues.apache.org/jira/browse/ZOOKEEPER-3234) - Add Travis-CI configuration file
+* [ZOOKEEPER-3235](https://issues.apache.org/jira/browse/ZOOKEEPER-3235) - Enable secure processing and disallow DTDs in the SAXParserFactory
+* [ZOOKEEPER-3236](https://issues.apache.org/jira/browse/ZOOKEEPER-3236) - Upgrade BouncyCastle
+* [ZOOKEEPER-3237](https://issues.apache.org/jira/browse/ZOOKEEPER-3237) - Allow IPv6 wildcard address in peer config
+* [ZOOKEEPER-3238](https://issues.apache.org/jira/browse/ZOOKEEPER-3238) - Add rel=&quot;noopener noreferrer&quot; to target blank link in zookeeper-contrib-huebrowser
+* [ZOOKEEPER-3239](https://issues.apache.org/jira/browse/ZOOKEEPER-3239) - Adding EnsembleAuthProvider to verify the ensemble name
+* [ZOOKEEPER-3240](https://issues.apache.org/jira/browse/ZOOKEEPER-3240) - Close socket on Learner shutdown to avoid dangling socket
+* [ZOOKEEPER-3242](https://issues.apache.org/jira/browse/ZOOKEEPER-3242) - Add server side connecting throttling
+* [ZOOKEEPER-3243](https://issues.apache.org/jira/browse/ZOOKEEPER-3243) - Add server side request throttling
+* [ZOOKEEPER-3245](https://issues.apache.org/jira/browse/ZOOKEEPER-3245) - Add useful metrics for ZK pipeline and request/server states
+* [ZOOKEEPER-3249](https://issues.apache.org/jira/browse/ZOOKEEPER-3249) - Avoid reverting the cversion and pzxid during replaying txns with fuzzy snapshot
+* [ZOOKEEPER-3250](https://issues.apache.org/jira/browse/ZOOKEEPER-3250) - typo in doc - zookeeperInternals
+* [ZOOKEEPER-3255](https://issues.apache.org/jira/browse/ZOOKEEPER-3255) - add a banner to make the startup of zk server more cool
+* [ZOOKEEPER-3257](https://issues.apache.org/jira/browse/ZOOKEEPER-3257) - Merge count and byte update of Stat
+* [ZOOKEEPER-3262](https://issues.apache.org/jira/browse/ZOOKEEPER-3262) - Update dependencies flagged by OWASP report
+* [ZOOKEEPER-3263](https://issues.apache.org/jira/browse/ZOOKEEPER-3263) - Illegal reflective access in zookeer&#39;s kerberosUtil
+* [ZOOKEEPER-3272](https://issues.apache.org/jira/browse/ZOOKEEPER-3272) - Clean up netty4 code per Norman Maurer&#39;s review comments
+* [ZOOKEEPER-3273](https://issues.apache.org/jira/browse/ZOOKEEPER-3273) - Sync BouncyCastle version in Maven build and Ant  build
+* [ZOOKEEPER-3274](https://issues.apache.org/jira/browse/ZOOKEEPER-3274) - Use CompositeByteBuf to queue data in NettyServerCnxn
+* [ZOOKEEPER-3276](https://issues.apache.org/jira/browse/ZOOKEEPER-3276) - Make X509UtilTest.testCreateSSLServerSocketWithPort less flaky
+* [ZOOKEEPER-3277](https://issues.apache.org/jira/browse/ZOOKEEPER-3277) - Add trace listener in NettyServerCnxnFactory only if trace logging is enabled
+* [ZOOKEEPER-3291](https://issues.apache.org/jira/browse/ZOOKEEPER-3291) - improve error message when JAVA_HOME is set to the wrong value
+* [ZOOKEEPER-3312](https://issues.apache.org/jira/browse/ZOOKEEPER-3312) - Upgrade Jetty to 9.4.15.v20190215
+* [ZOOKEEPER-3314](https://issues.apache.org/jira/browse/ZOOKEEPER-3314) - Document the possibility of MultiCallback receiving a null pointer
+* [ZOOKEEPER-3332](https://issues.apache.org/jira/browse/ZOOKEEPER-3332) - TxnLogToolkit should print multi transactions readably
+* [ZOOKEEPER-3335](https://issues.apache.org/jira/browse/ZOOKEEPER-3335) - Improve the usage of Collections
+* [ZOOKEEPER-3339](https://issues.apache.org/jira/browse/ZOOKEEPER-3339) - Improve Debug and Trace Log Statements
+* [ZOOKEEPER-3340](https://issues.apache.org/jira/browse/ZOOKEEPER-3340) - Introduce CircularBlockingQueue in QuorumCnxManager.java
+* [ZOOKEEPER-3341](https://issues.apache.org/jira/browse/ZOOKEEPER-3341) - Remove Superfluous ByteBuffer Duplicate
+* [ZOOKEEPER-3347](https://issues.apache.org/jira/browse/ZOOKEEPER-3347) - Improve PathTrie Consistency 
+* [ZOOKEEPER-3348](https://issues.apache.org/jira/browse/ZOOKEEPER-3348) - Make TxnLog and TxnLog Iterator Closable
+* [ZOOKEEPER-3350](https://issues.apache.org/jira/browse/ZOOKEEPER-3350) - Get rid of CommonNames
+* [ZOOKEEPER-3351](https://issues.apache.org/jira/browse/ZOOKEEPER-3351) - Migrate qa-test-pullrequest ant task to maven
+* [ZOOKEEPER-3353](https://issues.apache.org/jira/browse/ZOOKEEPER-3353) - Admin commands for showing initial settings
+* [ZOOKEEPER-3354](https://issues.apache.org/jira/browse/ZOOKEEPER-3354) - Improve efficiency of DeleteAllCommand
+* [ZOOKEEPER-3359](https://issues.apache.org/jira/browse/ZOOKEEPER-3359) - Batch commits in the CommitProcessor
+* [ZOOKEEPER-3360](https://issues.apache.org/jira/browse/ZOOKEEPER-3360) - Misprint in WriteLock javadoc
+* [ZOOKEEPER-3364](https://issues.apache.org/jira/browse/ZOOKEEPER-3364) - Compile with strict options in order to check code quality
+* [ZOOKEEPER-3365](https://issues.apache.org/jira/browse/ZOOKEEPER-3365) - Use Concurrent HashMap in NettyServerCnxnFactory 
+* [ZOOKEEPER-3369](https://issues.apache.org/jira/browse/ZOOKEEPER-3369) - Maven release artifacts cleanup
+* [ZOOKEEPER-3370](https://issues.apache.org/jira/browse/ZOOKEEPER-3370) - Remove SVN specific revision generation
+* [ZOOKEEPER-3372](https://issues.apache.org/jira/browse/ZOOKEEPER-3372) - Cleanup pom.xml in order to let Maven clients import as few dependencies as possible
+* [ZOOKEEPER-3378](https://issues.apache.org/jira/browse/ZOOKEEPER-3378) - Set the quorum cnxn timeout independently from syncLimit
+* [ZOOKEEPER-3382](https://issues.apache.org/jira/browse/ZOOKEEPER-3382) - Update Documentation: If you only have one storage device
+* [ZOOKEEPER-3385](https://issues.apache.org/jira/browse/ZOOKEEPER-3385) - Add admin command to display leader
+* [ZOOKEEPER-3386](https://issues.apache.org/jira/browse/ZOOKEEPER-3386) - Add admin command to display voting view
+* [ZOOKEEPER-3388](https://issues.apache.org/jira/browse/ZOOKEEPER-3388) - Allow client port to support plaintext and encrypted connections simultaneously
+* [ZOOKEEPER-3391](https://issues.apache.org/jira/browse/ZOOKEEPER-3391) - Drop unused CSVInputArchive and XMLInputArchive
+* [ZOOKEEPER-3392](https://issues.apache.org/jira/browse/ZOOKEEPER-3392) - Add admin command to display last snapshot information
+* [ZOOKEEPER-3394](https://issues.apache.org/jira/browse/ZOOKEEPER-3394) - Delay observer reconnect when all learner masters have been tried
+* [ZOOKEEPER-3395](https://issues.apache.org/jira/browse/ZOOKEEPER-3395) - Document individual admin commands in markdown
+* [ZOOKEEPER-3396](https://issues.apache.org/jira/browse/ZOOKEEPER-3396) - Flaky test in RestoreCommittedLogTest
+* [ZOOKEEPER-3398](https://issues.apache.org/jira/browse/ZOOKEEPER-3398) - Learner.connectToLeader() may take too long to time-out 
+* [ZOOKEEPER-3400](https://issues.apache.org/jira/browse/ZOOKEEPER-3400) - Add documentation on local sessions
+* [ZOOKEEPER-3402](https://issues.apache.org/jira/browse/ZOOKEEPER-3402) - Add a multiRead operation
+* [ZOOKEEPER-3416](https://issues.apache.org/jira/browse/ZOOKEEPER-3416) - Remove redundant ServerCnxnFactoryAccessor
+* [ZOOKEEPER-3418](https://issues.apache.org/jira/browse/ZOOKEEPER-3418) - Improve quorum throughput through eager ACL checks of requests on local servers
+* [ZOOKEEPER-3423](https://issues.apache.org/jira/browse/ZOOKEEPER-3423) - use the maven-like way to ignore the generated version java files and doc the cmd:&#39;./zkServer.sh version&#39;
+* [ZOOKEEPER-3430](https://issues.apache.org/jira/browse/ZOOKEEPER-3430) - Observability improvement: provide top N read / write path queries
+* [ZOOKEEPER-3436](https://issues.apache.org/jira/browse/ZOOKEEPER-3436) - Enhance Mavenized Make C client 
+* [ZOOKEEPER-3437](https://issues.apache.org/jira/browse/ZOOKEEPER-3437) - Improve sync throttling on a learner master
+* [ZOOKEEPER-3439](https://issues.apache.org/jira/browse/ZOOKEEPER-3439) - Observability improvements on client / server connection close
+* [ZOOKEEPER-3448](https://issues.apache.org/jira/browse/ZOOKEEPER-3448) - Introduce MessageTracker to assist debug leader and leaner connectivity issues
+* [ZOOKEEPER-3453](https://issues.apache.org/jira/browse/ZOOKEEPER-3453) - missing &#39;SET&#39; in zkCli on windows
+* [ZOOKEEPER-3457](https://issues.apache.org/jira/browse/ZOOKEEPER-3457) - Code optimization in QuorumCnxManager
+* [ZOOKEEPER-3459](https://issues.apache.org/jira/browse/ZOOKEEPER-3459) - Add admin command to display synced state of peer
+* [ZOOKEEPER-3472](https://issues.apache.org/jira/browse/ZOOKEEPER-3472) - Treat check request as a write request which needs to wait for the check txn commit from leader
+* [ZOOKEEPER-3473](https://issues.apache.org/jira/browse/ZOOKEEPER-3473) - Improving successful TLS handshake throughput with concurrent control
+* [ZOOKEEPER-3484](https://issues.apache.org/jira/browse/ZOOKEEPER-3484) - Improve the throughput by optimizing the synchronization around outstandingChanges
+* [ZOOKEEPER-3491](https://issues.apache.org/jira/browse/ZOOKEEPER-3491) - Specify commitLogCount value using a system property
+* [ZOOKEEPER-3492](https://issues.apache.org/jira/browse/ZOOKEEPER-3492) - Add weights to server side connection throttling
+* [ZOOKEEPER-3494](https://issues.apache.org/jira/browse/ZOOKEEPER-3494) - No need to depend on netty-all (SSL)
+* [ZOOKEEPER-3501](https://issues.apache.org/jira/browse/ZOOKEEPER-3501) - unify the method:op2String()
+* [ZOOKEEPER-3502](https://issues.apache.org/jira/browse/ZOOKEEPER-3502) - improve the server command: zabstate to have a better observation on the process of leader election
+* [ZOOKEEPER-3503](https://issues.apache.org/jira/browse/ZOOKEEPER-3503) - Add server side large request throttling
+* [ZOOKEEPER-3506](https://issues.apache.org/jira/browse/ZOOKEEPER-3506) - correct the SessionTrackerImpl#initializeNextSession&#39;s javaDoc about how to generate the sessionId
+* [ZOOKEEPER-3509](https://issues.apache.org/jira/browse/ZOOKEEPER-3509) - Revisit log format
+* [ZOOKEEPER-3519](https://issues.apache.org/jira/browse/ZOOKEEPER-3519) - upgrade dependency-check to 5.2.1
+* [ZOOKEEPER-3522](https://issues.apache.org/jira/browse/ZOOKEEPER-3522) - Consistency guarantees discussion.
+* [ZOOKEEPER-3523](https://issues.apache.org/jira/browse/ZOOKEEPER-3523) - Replace dummy watcher with a unified singleton
+* [ZOOKEEPER-3525](https://issues.apache.org/jira/browse/ZOOKEEPER-3525) - Add project status badges to README
+* [ZOOKEEPER-3530](https://issues.apache.org/jira/browse/ZOOKEEPER-3530) - Include compiled C-client in the binary tarball
+* [ZOOKEEPER-3532](https://issues.apache.org/jira/browse/ZOOKEEPER-3532) - Provide a docker-based environment to work on a known OS
+* [ZOOKEEPER-3537](https://issues.apache.org/jira/browse/ZOOKEEPER-3537) - Leader election - Use of out of election messages
+* [ZOOKEEPER-3548](https://issues.apache.org/jira/browse/ZOOKEEPER-3548) - Redundant zxid check in SnapStream.isValidSnapshot
+* [ZOOKEEPER-3560](https://issues.apache.org/jira/browse/ZOOKEEPER-3560) - Add response cache to serve get children (2) requests.
+* [ZOOKEEPER-3570](https://issues.apache.org/jira/browse/ZOOKEEPER-3570) - make the special client xid constant
+* [ZOOKEEPER-3571](https://issues.apache.org/jira/browse/ZOOKEEPER-3571) - Create test base directory on test started
+* [ZOOKEEPER-3593](https://issues.apache.org/jira/browse/ZOOKEEPER-3593) - fix the default value of jute.maxbuffer in client side and an optimization for the documentation
+* [ZOOKEEPER-3595](https://issues.apache.org/jira/browse/ZOOKEEPER-3595) - Fsync parameter for serialize method is ingnored
+* [ZOOKEEPER-3599](https://issues.apache.org/jira/browse/ZOOKEEPER-3599) - cli.c: Resuscitate &quot;old-style&quot; argument parsing
+* [ZOOKEEPER-3606](https://issues.apache.org/jira/browse/ZOOKEEPER-3606) - add JMXHOSTNAME to zkServer.sh to enable user to change the exposed hostname of jmx service
+* [ZOOKEEPER-3620](https://issues.apache.org/jira/browse/ZOOKEEPER-3620) - Allow to override calls to System.exit in server side code
+* [ZOOKEEPER-3630](https://issues.apache.org/jira/browse/ZOOKEEPER-3630) - Autodetection of SSL library during Zookeeper C client build
+* [ZOOKEEPER-3636](https://issues.apache.org/jira/browse/ZOOKEEPER-3636) - find back the missing configuration property in the zookeeperAdmin page when moving from xml to markdown
+
+## Bug
+
+* [ZOOKEEPER-706](https://issues.apache.org/jira/browse/ZOOKEEPER-706) - large numbers of watches can cause session re-establishment to fail
+* [ZOOKEEPER-1029](https://issues.apache.org/jira/browse/ZOOKEEPER-1029) - C client bug in zookeeper_init (if bad hostname is given)
+* [ZOOKEEPER-1077](https://issues.apache.org/jira/browse/ZOOKEEPER-1077) - C client lib doesn&#39;t build on Solaris
+* [ZOOKEEPER-1256](https://issues.apache.org/jira/browse/ZOOKEEPER-1256) - ClientPortBindTest is failing on Mac OS X
+* [ZOOKEEPER-1366](https://issues.apache.org/jira/browse/ZOOKEEPER-1366) - Zookeeper should be tolerant of clock adjustments
+* [ZOOKEEPER-1371](https://issues.apache.org/jira/browse/ZOOKEEPER-1371) - Remove dependency on log4j in the source code.
+* [ZOOKEEPER-1392](https://issues.apache.org/jira/browse/ZOOKEEPER-1392) - Should not allow to read ACL when not authorized to read node
+* [ZOOKEEPER-1460](https://issues.apache.org/jira/browse/ZOOKEEPER-1460) - IPv6 literal address not supported for quorum members
+* [ZOOKEEPER-1580](https://issues.apache.org/jira/browse/ZOOKEEPER-1580) - QuorumPeer.setRunning is not used
+* [ZOOKEEPER-1636](https://issues.apache.org/jira/browse/ZOOKEEPER-1636) - c-client crash when zoo_amulti failed 
+* [ZOOKEEPER-1782](https://issues.apache.org/jira/browse/ZOOKEEPER-1782) - zookeeper.superUser is not as super as superDigest
+* [ZOOKEEPER-1803](https://issues.apache.org/jira/browse/ZOOKEEPER-1803) - Add description for pzxid in programmer&#39;s guide.
+* [ZOOKEEPER-1807](https://issues.apache.org/jira/browse/ZOOKEEPER-1807) - Observers spam each other creating connections to the election addr
+* [ZOOKEEPER-1818](https://issues.apache.org/jira/browse/ZOOKEEPER-1818) - Fix don&#39;t care for trunk
+* [ZOOKEEPER-1823](https://issues.apache.org/jira/browse/ZOOKEEPER-1823) - zkTxnLogToolkit -dump should support printing transaction data as a string
+* [ZOOKEEPER-1853](https://issues.apache.org/jira/browse/ZOOKEEPER-1853) - zkCli.sh can&#39;t issue a CREATE command containing spaces in the data
+* [ZOOKEEPER-1893](https://issues.apache.org/jira/browse/ZOOKEEPER-1893) - automake: use serial-tests option
+* [ZOOKEEPER-1898](https://issues.apache.org/jira/browse/ZOOKEEPER-1898) - ZooKeeper Java cli shell always returns &quot;0&quot; as exit code
+* [ZOOKEEPER-1917](https://issues.apache.org/jira/browse/ZOOKEEPER-1917) - Apache Zookeeper logs cleartext admin passwords
+* [ZOOKEEPER-1919](https://issues.apache.org/jira/browse/ZOOKEEPER-1919) - Update the C implementation of removeWatches to have it match ZOOKEEPER-1910
+* [ZOOKEEPER-1927](https://issues.apache.org/jira/browse/ZOOKEEPER-1927) - zkServer.sh fails to read dataDir (and others) from zoo.cfg on Solaris 10 (grep issue, manifests as FAILED TO WRITE PID).  
+* [ZOOKEEPER-1932](https://issues.apache.org/jira/browse/ZOOKEEPER-1932) - Remove deprecated LeaderElection class
+* [ZOOKEEPER-1949](https://issues.apache.org/jira/browse/ZOOKEEPER-1949) - recipes jar not included in the distribution package
+* [ZOOKEEPER-1952](https://issues.apache.org/jira/browse/ZOOKEEPER-1952) - Default log directory and file name can be changed
+* [ZOOKEEPER-1990](https://issues.apache.org/jira/browse/ZOOKEEPER-1990) - suspicious instantiation of java Random instances
+* [ZOOKEEPER-1991](https://issues.apache.org/jira/browse/ZOOKEEPER-1991) - zkServer.sh returns with a zero exit status when a ZooKeeper process is already running
+* [ZOOKEEPER-2006](https://issues.apache.org/jira/browse/ZOOKEEPER-2006) - Standalone mode won&#39;t take client port from dynamic config
+* [ZOOKEEPER-2008](https://issues.apache.org/jira/browse/ZOOKEEPER-2008) - System test fails due to missing leader election port
+* [ZOOKEEPER-2013](https://issues.apache.org/jira/browse/ZOOKEEPER-2013) - typos in zookeeperProgrammers
+* [ZOOKEEPER-2014](https://issues.apache.org/jira/browse/ZOOKEEPER-2014) - Only admin should be allowed to reconfig a cluster
+* [ZOOKEEPER-2026](https://issues.apache.org/jira/browse/ZOOKEEPER-2026) - Startup order in ServerCnxnFactory-ies is wrong
+* [ZOOKEEPER-2029](https://issues.apache.org/jira/browse/ZOOKEEPER-2029) - Leader.LearnerCnxAcceptor should handle exceptions in run()
+* [ZOOKEEPER-2030](https://issues.apache.org/jira/browse/ZOOKEEPER-2030) - dynamicConfigFile should have an absolute path, not a relative path, to the dynamic configuration file
+* [ZOOKEEPER-2049](https://issues.apache.org/jira/browse/ZOOKEEPER-2049) - Yosemite build failure: htonll conflict
+* [ZOOKEEPER-2052](https://issues.apache.org/jira/browse/ZOOKEEPER-2052) - Unable to delete a node when the node has no children
+* [ZOOKEEPER-2054](https://issues.apache.org/jira/browse/ZOOKEEPER-2054) - test-patch.sh: don&#39;t set ulimit -n
+* [ZOOKEEPER-2056](https://issues.apache.org/jira/browse/ZOOKEEPER-2056) - Zookeeper 3.4.x and 3.5.0-alpha is not OSGi compliant
+* [ZOOKEEPER-2058](https://issues.apache.org/jira/browse/ZOOKEEPER-2058) - rat: exclude *.cer files
+* [ZOOKEEPER-2060](https://issues.apache.org/jira/browse/ZOOKEEPER-2060) - Trace bug in NettyServerCnxnFactory
+* [ZOOKEEPER-2062](https://issues.apache.org/jira/browse/ZOOKEEPER-2062) - RemoveWatchesTest takes forever to run
+* [ZOOKEEPER-2064](https://issues.apache.org/jira/browse/ZOOKEEPER-2064) - Prevent resource leak in various classes
+* [ZOOKEEPER-2072](https://issues.apache.org/jira/browse/ZOOKEEPER-2072) - Netty Server Should Configure Child Channel Pipeline By Specifying ChannelPipelineFactory
+* [ZOOKEEPER-2073](https://issues.apache.org/jira/browse/ZOOKEEPER-2073) - Memory leak on zookeeper_close
+* [ZOOKEEPER-2074](https://issues.apache.org/jira/browse/ZOOKEEPER-2074) - Incorrect exit codes for &quot;./zkCli.sh cmd arg&quot;
+* [ZOOKEEPER-2096](https://issues.apache.org/jira/browse/ZOOKEEPER-2096) - C client builds with incorrect error codes in VisualStudio 2010+
+* [ZOOKEEPER-2109](https://issues.apache.org/jira/browse/ZOOKEEPER-2109) - Typo in src/c/src/load_gen.c
+* [ZOOKEEPER-2111](https://issues.apache.org/jira/browse/ZOOKEEPER-2111) - Not isAlive states should be synchronized in ClientCnxn
+* [ZOOKEEPER-2114](https://issues.apache.org/jira/browse/ZOOKEEPER-2114) - jute generated allocate_* functions are not externally visible
+* [ZOOKEEPER-2116](https://issues.apache.org/jira/browse/ZOOKEEPER-2116) - zkCli.sh doesn&#39;t honor host:port parameter
+* [ZOOKEEPER-2124](https://issues.apache.org/jira/browse/ZOOKEEPER-2124) - Allow Zookeeper version string to have underscore &#39;_&#39;
+* [ZOOKEEPER-2133](https://issues.apache.org/jira/browse/ZOOKEEPER-2133) - zkperl: Segmentation fault if getting a node with null value
+* [ZOOKEEPER-2142](https://issues.apache.org/jira/browse/ZOOKEEPER-2142) - JMX ObjectName is incorrect for observers
+* [ZOOKEEPER-2146](https://issues.apache.org/jira/browse/ZOOKEEPER-2146) - BinaryInputArchive readString should check length before allocating memory
+* [ZOOKEEPER-2156](https://issues.apache.org/jira/browse/ZOOKEEPER-2156) - If JAVA_HOME is not set zk startup and fetching status command execution result misleads user.
+* [ZOOKEEPER-2157](https://issues.apache.org/jira/browse/ZOOKEEPER-2157) - Upgrade option should be removed from zkServer.sh usage
+* [ZOOKEEPER-2171](https://issues.apache.org/jira/browse/ZOOKEEPER-2171) - avoid reverse lookups in QuorumCnxManager
+* [ZOOKEEPER-2172](https://issues.apache.org/jira/browse/ZOOKEEPER-2172) - Cluster crashes when reconfig a new node as a participant
+* [ZOOKEEPER-2173](https://issues.apache.org/jira/browse/ZOOKEEPER-2173) - ZK startup failure should be handled with proper error message
+* [ZOOKEEPER-2174](https://issues.apache.org/jira/browse/ZOOKEEPER-2174) - JUnit4ZKTestRunner logs test failure for all exceptions even if the test method is annotated with an expected exception.
+* [ZOOKEEPER-2178](https://issues.apache.org/jira/browse/ZOOKEEPER-2178) - Native client fails compilation on Windows.
+* [ZOOKEEPER-2182](https://issues.apache.org/jira/browse/ZOOKEEPER-2182) - Several test suites are not running during pre-commit, because their names do not end with &quot;Test&quot;.
+* [ZOOKEEPER-2184](https://issues.apache.org/jira/browse/ZOOKEEPER-2184) - Zookeeper Client should re-resolve hosts when connection attempts fail
+* [ZOOKEEPER-2186](https://issues.apache.org/jira/browse/ZOOKEEPER-2186) - QuorumCnxManager#receiveConnection may crash with random input
+* [ZOOKEEPER-2187](https://issues.apache.org/jira/browse/ZOOKEEPER-2187) - remove duplicated code between CreateRequest{,2}
+* [ZOOKEEPER-2190](https://issues.apache.org/jira/browse/ZOOKEEPER-2190) - In StandaloneDisabledTest, testReconfig() shouldn&#39;t take leaving servers as joining servers
+* [ZOOKEEPER-2193](https://issues.apache.org/jira/browse/ZOOKEEPER-2193) - reconfig command completes even if parameter is wrong obviously
+* [ZOOKEEPER-2195](https://issues.apache.org/jira/browse/ZOOKEEPER-2195) - fsync.warningthresholdms in zoo.cfg not working
+* [ZOOKEEPER-2197](https://issues.apache.org/jira/browse/ZOOKEEPER-2197) - non-ascii character in FinalRequestProcessor.java
+* [ZOOKEEPER-2198](https://issues.apache.org/jira/browse/ZOOKEEPER-2198) - Set default test.junit.threads to 1.
+* [ZOOKEEPER-2201](https://issues.apache.org/jira/browse/ZOOKEEPER-2201) - Network issues can cause cluster to hang due to near-deadlock
+* [ZOOKEEPER-2210](https://issues.apache.org/jira/browse/ZOOKEEPER-2210) - clock_gettime is not available in os x
+* [ZOOKEEPER-2211](https://issues.apache.org/jira/browse/ZOOKEEPER-2211) - PurgeTxnLog does not correctly purge when snapshots and logs are at different locations
+* [ZOOKEEPER-2212](https://issues.apache.org/jira/browse/ZOOKEEPER-2212) - distributed race condition related to QV version
+* [ZOOKEEPER-2213](https://issues.apache.org/jira/browse/ZOOKEEPER-2213) - Empty path in Set crashes server and prevents restart
+* [ZOOKEEPER-2221](https://issues.apache.org/jira/browse/ZOOKEEPER-2221) - Zookeeper JettyAdminServer server should start on configured IP.
+* [ZOOKEEPER-2224](https://issues.apache.org/jira/browse/ZOOKEEPER-2224) - Four letter command hangs when network is slow
+* [ZOOKEEPER-2227](https://issues.apache.org/jira/browse/ZOOKEEPER-2227) - stmk four-letter word fails execution at server while reading trace mask argument.
+* [ZOOKEEPER-2229](https://issues.apache.org/jira/browse/ZOOKEEPER-2229) - Several four-letter words are undocumented.
+* [ZOOKEEPER-2235](https://issues.apache.org/jira/browse/ZOOKEEPER-2235) - License update
+* [ZOOKEEPER-2239](https://issues.apache.org/jira/browse/ZOOKEEPER-2239) - JMX State from LocalPeerBean incorrect
+* [ZOOKEEPER-2243](https://issues.apache.org/jira/browse/ZOOKEEPER-2243) - Supported platforms is completely out of date
+* [ZOOKEEPER-2244](https://issues.apache.org/jira/browse/ZOOKEEPER-2244) - On Windows zookeeper fails to restart
+* [ZOOKEEPER-2245](https://issues.apache.org/jira/browse/ZOOKEEPER-2245) - SimpleSysTest test cases fails
+* [ZOOKEEPER-2247](https://issues.apache.org/jira/browse/ZOOKEEPER-2247) - Zookeeper service becomes unavailable when leader fails to write transaction log
+* [ZOOKEEPER-2249](https://issues.apache.org/jira/browse/ZOOKEEPER-2249) - CRC check failed when preAllocSize smaller than node data
+* [ZOOKEEPER-2251](https://issues.apache.org/jira/browse/ZOOKEEPER-2251) - Add Client side packet response timeout to avoid infinite wait.
+* [ZOOKEEPER-2252](https://issues.apache.org/jira/browse/ZOOKEEPER-2252) - Random test case failure in org.apache.zookeeper.test.StaticHostProviderTest
+* [ZOOKEEPER-2256](https://issues.apache.org/jira/browse/ZOOKEEPER-2256) - Zookeeper is not using specified JMX port in zkEnv.sh
+* [ZOOKEEPER-2261](https://issues.apache.org/jira/browse/ZOOKEEPER-2261) - When only secureClientPort is configured connections, configuration, connection_stat_reset, and stats admin commands throw NullPointerException
+* [ZOOKEEPER-2264](https://issues.apache.org/jira/browse/ZOOKEEPER-2264) - Wrong error message when secureClientPortAddress is configured but secureClientPort is not configured 
+* [ZOOKEEPER-2269](https://issues.apache.org/jira/browse/ZOOKEEPER-2269) - NullPointerException  in RemotePeerBean
+* [ZOOKEEPER-2279](https://issues.apache.org/jira/browse/ZOOKEEPER-2279) - QuorumPeer  loadDataBase() error message is incorrect
+* [ZOOKEEPER-2281](https://issues.apache.org/jira/browse/ZOOKEEPER-2281) - ZK Server startup fails if there are spaces in the JAVA_HOME path
+* [ZOOKEEPER-2282](https://issues.apache.org/jira/browse/ZOOKEEPER-2282) - chroot not stripped from path in asynchronous callbacks
+* [ZOOKEEPER-2283](https://issues.apache.org/jira/browse/ZOOKEEPER-2283) - traceFile property is not used in the ZooKeeper,  it should be removed from documentation
+* [ZOOKEEPER-2284](https://issues.apache.org/jira/browse/ZOOKEEPER-2284) - LogFormatter and SnapshotFormatter does not handle FileNotFoundException gracefully
+* [ZOOKEEPER-2294](https://issues.apache.org/jira/browse/ZOOKEEPER-2294) - Ant target generate-clover-reports is broken
+* [ZOOKEEPER-2295](https://issues.apache.org/jira/browse/ZOOKEEPER-2295) - TGT refresh time logic is wrong
+* [ZOOKEEPER-2297](https://issues.apache.org/jira/browse/ZOOKEEPER-2297) - NPE is thrown while creating &quot;key manager&quot; and &quot;trust manager&quot; 
+* [ZOOKEEPER-2299](https://issues.apache.org/jira/browse/ZOOKEEPER-2299) - NullPointerException in LocalPeerBean for ClientAddress
+* [ZOOKEEPER-2302](https://issues.apache.org/jira/browse/ZOOKEEPER-2302) - Some test cases are not running because wrongly named
+* [ZOOKEEPER-2307](https://issues.apache.org/jira/browse/ZOOKEEPER-2307) - ZooKeeper not starting because acceptedEpoch is less than the currentEpoch
+* [ZOOKEEPER-2311](https://issues.apache.org/jira/browse/ZOOKEEPER-2311) - assert in setup_random
+* [ZOOKEEPER-2316](https://issues.apache.org/jira/browse/ZOOKEEPER-2316) - comment does not match code logic
+* [ZOOKEEPER-2317](https://issues.apache.org/jira/browse/ZOOKEEPER-2317) - Non-OSGi compatible version
+* [ZOOKEEPER-2319](https://issues.apache.org/jira/browse/ZOOKEEPER-2319) - UnresolvedAddressException cause the QuorumCnxManager.Listener exit
+* [ZOOKEEPER-2325](https://issues.apache.org/jira/browse/ZOOKEEPER-2325) - Data inconsistency if all snapshots empty or missing
+* [ZOOKEEPER-2330](https://issues.apache.org/jira/browse/ZOOKEEPER-2330) - ZooKeeper close API does not close Login thread.
+* [ZOOKEEPER-2335](https://issues.apache.org/jira/browse/ZOOKEEPER-2335) - Java Compilation Error in ClientCnxn.java
+* [ZOOKEEPER-2338](https://issues.apache.org/jira/browse/ZOOKEEPER-2338) - c bindings should create socket&#39;s with SOCK_CLOEXEC to avoid fd leaks on fork/exec
+* [ZOOKEEPER-2340](https://issues.apache.org/jira/browse/ZOOKEEPER-2340) - JMX is disabled even if JMXDISABLE is false
+* [ZOOKEEPER-2349](https://issues.apache.org/jira/browse/ZOOKEEPER-2349) - Update documentation for snapCount
+* [ZOOKEEPER-2355](https://issues.apache.org/jira/browse/ZOOKEEPER-2355) - Ephemeral node is never deleted if follower fails while reading the proposal packet
+* [ZOOKEEPER-2364](https://issues.apache.org/jira/browse/ZOOKEEPER-2364) - &quot;ant docs&quot; fails on branch-3.5 due to missing releasenotes.xml.
+* [ZOOKEEPER-2366](https://issues.apache.org/jira/browse/ZOOKEEPER-2366) - Reconfiguration of client port causes a socket leak
+* [ZOOKEEPER-2375](https://issues.apache.org/jira/browse/ZOOKEEPER-2375) - Prevent multiple initialization of login object in each ZooKeeperSaslClient instance
+* [ZOOKEEPER-2379](https://issues.apache.org/jira/browse/ZOOKEEPER-2379) - recent commit broke findbugs qabot check
+* [ZOOKEEPER-2380](https://issues.apache.org/jira/browse/ZOOKEEPER-2380) - Deadlock between leader shutdown and forwarding ACK to the leader
+* [ZOOKEEPER-2383](https://issues.apache.org/jira/browse/ZOOKEEPER-2383) - Startup race in ZooKeeperServer
+* [ZOOKEEPER-2385](https://issues.apache.org/jira/browse/ZOOKEEPER-2385) - Zookeeper trunk build is failing on windows
+* [ZOOKEEPER-2388](https://issues.apache.org/jira/browse/ZOOKEEPER-2388) - Unit tests failing on Solaris
+* [ZOOKEEPER-2393](https://issues.apache.org/jira/browse/ZOOKEEPER-2393) - Revert run-time dependency on log4j and slf4j-log4j12
+* [ZOOKEEPER-2405](https://issues.apache.org/jira/browse/ZOOKEEPER-2405) - getTGT() in Login.java mishandles confidential information
+* [ZOOKEEPER-2413](https://issues.apache.org/jira/browse/ZOOKEEPER-2413) - ContainerManager doesn&#39;t close the Timer it creates when stop() is called
+* [ZOOKEEPER-2418](https://issues.apache.org/jira/browse/ZOOKEEPER-2418) - txnlog diff sync can skip sending some transactions to followers
+* [ZOOKEEPER-2442](https://issues.apache.org/jira/browse/ZOOKEEPER-2442) - Socket leak in QuorumCnxManager connectOne
+* [ZOOKEEPER-2450](https://issues.apache.org/jira/browse/ZOOKEEPER-2450) - Upgrade Netty version due to security vulnerability (CVE-2014-3488)
+* [ZOOKEEPER-2458](https://issues.apache.org/jira/browse/ZOOKEEPER-2458) - Remove license file for servlet-api dependency
+* [ZOOKEEPER-2459](https://issues.apache.org/jira/browse/ZOOKEEPER-2459) - Update NOTICE file with Netty notice
+* [ZOOKEEPER-2460](https://issues.apache.org/jira/browse/ZOOKEEPER-2460) - Remove javacc dependency from public Maven pom
+* [ZOOKEEPER-2464](https://issues.apache.org/jira/browse/ZOOKEEPER-2464) - NullPointerException on ContainerManager
+* [ZOOKEEPER-2465](https://issues.apache.org/jira/browse/ZOOKEEPER-2465) - Documentation copyright notice is out of date.
+* [ZOOKEEPER-2467](https://issues.apache.org/jira/browse/ZOOKEEPER-2467) - NullPointerException when redo Command is passed negative value
+* [ZOOKEEPER-2470](https://issues.apache.org/jira/browse/ZOOKEEPER-2470) - ServerConfig#parse(String[])  ignores tickTime
+* [ZOOKEEPER-2474](https://issues.apache.org/jira/browse/ZOOKEEPER-2474) - add a way for client to reattach to a session when using ZKClientConfig
+* [ZOOKEEPER-2477](https://issues.apache.org/jira/browse/ZOOKEEPER-2477) - documentation should refer to Java cli shell and not C cli shell
+* [ZOOKEEPER-2500](https://issues.apache.org/jira/browse/ZOOKEEPER-2500) - Fix compilation warnings for CliException classes
+* [ZOOKEEPER-2517](https://issues.apache.org/jira/browse/ZOOKEEPER-2517) - jute.maxbuffer is ignored
+* [ZOOKEEPER-2536](https://issues.apache.org/jira/browse/ZOOKEEPER-2536) - When provide path for &quot;dataDir&quot; with trailing space, it is taking correct path (by trucating space) for snapshot but creating temporary file with some junk folder name for zookeeper_server.pid
+* [ZOOKEEPER-2539](https://issues.apache.org/jira/browse/ZOOKEEPER-2539) - Throwing nullpointerException when run the command &quot;config -c&quot; when client port is mentioned as separate and not like new style
+* [ZOOKEEPER-2548](https://issues.apache.org/jira/browse/ZOOKEEPER-2548) - zooInspector does not start on Windows
+* [ZOOKEEPER-2558](https://issues.apache.org/jira/browse/ZOOKEEPER-2558) - Potential memory leak in recordio.c
+* [ZOOKEEPER-2563](https://issues.apache.org/jira/browse/ZOOKEEPER-2563) - A revisit to setquota
+* [ZOOKEEPER-2573](https://issues.apache.org/jira/browse/ZOOKEEPER-2573) - Modify Info.REVISION to adapt git repo
+* [ZOOKEEPER-2574](https://issues.apache.org/jira/browse/ZOOKEEPER-2574) - PurgeTxnLog can inadvertently delete required txn log files
+* [ZOOKEEPER-2576](https://issues.apache.org/jira/browse/ZOOKEEPER-2576) - After svn to git migration ZooKeeper Precommit jenkins job is failing.
+* [ZOOKEEPER-2579](https://issues.apache.org/jira/browse/ZOOKEEPER-2579) - ZooKeeper server should verify that dataDir and snapDir are writeable before starting
+* [ZOOKEEPER-2581](https://issues.apache.org/jira/browse/ZOOKEEPER-2581) - Not handled NullPointerException while creating key manager and trustManager
+* [ZOOKEEPER-2606](https://issues.apache.org/jira/browse/ZOOKEEPER-2606) - SaslServerCallbackHandler#handleAuthorizeCallback() should log the exception
+* [ZOOKEEPER-2611](https://issues.apache.org/jira/browse/ZOOKEEPER-2611) - zoo_remove_watchers - can remove the wrong watch 
+* [ZOOKEEPER-2617](https://issues.apache.org/jira/browse/ZOOKEEPER-2617) - correct a few spelling typos
+* [ZOOKEEPER-2621](https://issues.apache.org/jira/browse/ZOOKEEPER-2621) - ZooKeeper doesn&#39;t start on MINGW32 (Windows)
+* [ZOOKEEPER-2622](https://issues.apache.org/jira/browse/ZOOKEEPER-2622) - ZooTrace.logQuorumPacket does nothing
+* [ZOOKEEPER-2628](https://issues.apache.org/jira/browse/ZOOKEEPER-2628) - Investigate and fix findbug warnings
+* [ZOOKEEPER-2633](https://issues.apache.org/jira/browse/ZOOKEEPER-2633) - Build failure in contrib/zkfuse with gcc 6.x
+* [ZOOKEEPER-2635](https://issues.apache.org/jira/browse/ZOOKEEPER-2635) - Regenerate documentation
+* [ZOOKEEPER-2636](https://issues.apache.org/jira/browse/ZOOKEEPER-2636) - Fix C build break.
+* [ZOOKEEPER-2642](https://issues.apache.org/jira/browse/ZOOKEEPER-2642) - ZooKeeper reconfig API backward compatibility fix
+* [ZOOKEEPER-2647](https://issues.apache.org/jira/browse/ZOOKEEPER-2647) - Fix TestReconfigServer.cc
+* [ZOOKEEPER-2651](https://issues.apache.org/jira/browse/ZOOKEEPER-2651) - Missing src/pom.template in release
+* [ZOOKEEPER-2678](https://issues.apache.org/jira/browse/ZOOKEEPER-2678) - Large databases take a long time to regain a quorum
+* [ZOOKEEPER-2680](https://issues.apache.org/jira/browse/ZOOKEEPER-2680) - Correct DataNode.getChildren() inconsistent behaviour.
+* [ZOOKEEPER-2683](https://issues.apache.org/jira/browse/ZOOKEEPER-2683) - RaceConditionTest is flaky
+* [ZOOKEEPER-2684](https://issues.apache.org/jira/browse/ZOOKEEPER-2684) - Fix a crashing bug in the mixed workloads commit processor
+* [ZOOKEEPER-2687](https://issues.apache.org/jira/browse/ZOOKEEPER-2687) - Deadlock while shutting down the Leader server.
+* [ZOOKEEPER-2690](https://issues.apache.org/jira/browse/ZOOKEEPER-2690) - Update documentation source for ZOOKEEPER-2574
+* [ZOOKEEPER-2693](https://issues.apache.org/jira/browse/ZOOKEEPER-2693) - DOS attack on wchp/wchc four letter words (4lw)
+* [ZOOKEEPER-2694](https://issues.apache.org/jira/browse/ZOOKEEPER-2694) - sync CLI command does not wait for result from server
+* [ZOOKEEPER-2722](https://issues.apache.org/jira/browse/ZOOKEEPER-2722) - Flaky Test: org.apache.zookeeper.test.ReadOnlyModeTest.testSessionEstablishment
+* [ZOOKEEPER-2725](https://issues.apache.org/jira/browse/ZOOKEEPER-2725) - Upgrading to a global session fails with a multiop
+* [ZOOKEEPER-2726](https://issues.apache.org/jira/browse/ZOOKEEPER-2726) - Patch for ZOOKEEPER-2693 introduces potential race condition
+* [ZOOKEEPER-2735](https://issues.apache.org/jira/browse/ZOOKEEPER-2735) - Typo fixes in some scripts
+* [ZOOKEEPER-2737](https://issues.apache.org/jira/browse/ZOOKEEPER-2737) - NettyServerCnxFactory leaks connection if exception happens while writing to a channel.
+* [ZOOKEEPER-2743](https://issues.apache.org/jira/browse/ZOOKEEPER-2743) - Netty connection leaks JMX connection bean upon connection close in certain race conditions.
+* [ZOOKEEPER-2747](https://issues.apache.org/jira/browse/ZOOKEEPER-2747) - Fix ZooKeeperAdmin Compilation Warning
+* [ZOOKEEPER-2757](https://issues.apache.org/jira/browse/ZOOKEEPER-2757) - Incorrect path crashes zkCli
+* [ZOOKEEPER-2758](https://issues.apache.org/jira/browse/ZOOKEEPER-2758) - Typo: transasction --&gt; transaction
+* [ZOOKEEPER-2775](https://issues.apache.org/jira/browse/ZOOKEEPER-2775) - ZK Client not able to connect with Xid out of order error 
+* [ZOOKEEPER-2777](https://issues.apache.org/jira/browse/ZOOKEEPER-2777) - There is a typo in zk.py which prevents from using/compiling it.
+* [ZOOKEEPER-2778](https://issues.apache.org/jira/browse/ZOOKEEPER-2778) - Potential server deadlock between follower sync with leader and follower receiving external connection requests.
+* [ZOOKEEPER-2785](https://issues.apache.org/jira/browse/ZOOKEEPER-2785) - Server inappropriately throttles connections under load before SASL completes
+* [ZOOKEEPER-2786](https://issues.apache.org/jira/browse/ZOOKEEPER-2786) - Flaky test: org.apache.zookeeper.test.ClientTest.testNonExistingOpCode
+* [ZOOKEEPER-2797](https://issues.apache.org/jira/browse/ZOOKEEPER-2797) - Invalid TTL from misbehaving client nukes zookeeper
+* [ZOOKEEPER-2798](https://issues.apache.org/jira/browse/ZOOKEEPER-2798) - Fix flaky test: org.apache.zookeeper.test.ReadOnlyModeTest.testConnectionEvents
+* [ZOOKEEPER-2804](https://issues.apache.org/jira/browse/ZOOKEEPER-2804) - Node creation fails with NPE if ACLs are null
+* [ZOOKEEPER-2806](https://issues.apache.org/jira/browse/ZOOKEEPER-2806) - Flaky test: org.apache.zookeeper.server.quorum.FLEBackwardElectionRoundTest.testBackwardElectionRound
+* [ZOOKEEPER-2808](https://issues.apache.org/jira/browse/ZOOKEEPER-2808) - ACL with index 1 might be removed if it&#39;s only being used once
+* [ZOOKEEPER-2818](https://issues.apache.org/jira/browse/ZOOKEEPER-2818) - Improve the ZooKeeper#setACL  java doc
+* [ZOOKEEPER-2819](https://issues.apache.org/jira/browse/ZOOKEEPER-2819) - Changing membership configuration via rolling restart does not work on 3.5.x.
+* [ZOOKEEPER-2822](https://issues.apache.org/jira/browse/ZOOKEEPER-2822) - Wrong `ObjectName` about `MBeanServer` in JMX module
+* [ZOOKEEPER-2841](https://issues.apache.org/jira/browse/ZOOKEEPER-2841) - ZooKeeper public include files leak porting changes
+* [ZOOKEEPER-2845](https://issues.apache.org/jira/browse/ZOOKEEPER-2845) - Data inconsistency issue due to retain database in leader election
+* [ZOOKEEPER-2847](https://issues.apache.org/jira/browse/ZOOKEEPER-2847) - Cannot bind to client port when reconfig based on old static config
+* [ZOOKEEPER-2852](https://issues.apache.org/jira/browse/ZOOKEEPER-2852) - Snapshot size factor is not read from system property
+* [ZOOKEEPER-2853](https://issues.apache.org/jira/browse/ZOOKEEPER-2853) - The lastZxidSeen in FileTxnLog.java is never being assigned
+* [ZOOKEEPER-2859](https://issues.apache.org/jira/browse/ZOOKEEPER-2859) - CMake build doesn&#39;t support OS X
+* [ZOOKEEPER-2861](https://issues.apache.org/jira/browse/ZOOKEEPER-2861) - Main-Class JAR manifest attribute is incorrect
+* [ZOOKEEPER-2862](https://issues.apache.org/jira/browse/ZOOKEEPER-2862) - Incorrect javadoc syntax for web links in StaticHostProvider.java
+* [ZOOKEEPER-2874](https://issues.apache.org/jira/browse/ZOOKEEPER-2874) - Windows Debug builds don&#39;t link with `/MTd`
+* [ZOOKEEPER-2886](https://issues.apache.org/jira/browse/ZOOKEEPER-2886) - Permanent session moved error in multi-op only connections
+* [ZOOKEEPER-2890](https://issues.apache.org/jira/browse/ZOOKEEPER-2890) - Local automatic variable is left uninitialized and then freed.
+* [ZOOKEEPER-2891](https://issues.apache.org/jira/browse/ZOOKEEPER-2891) - Invalid processing of zookeeper_close for mutli-request
+* [ZOOKEEPER-2893](https://issues.apache.org/jira/browse/ZOOKEEPER-2893) - very poor choice of logging if client fails to connect to server
+* [ZOOKEEPER-2894](https://issues.apache.org/jira/browse/ZOOKEEPER-2894) - Memory and completions leak on zookeeper_close
+* [ZOOKEEPER-2901](https://issues.apache.org/jira/browse/ZOOKEEPER-2901) - Session ID that is negative causes mis-calculation of Ephemeral Type
+* [ZOOKEEPER-2905](https://issues.apache.org/jira/browse/ZOOKEEPER-2905) - Don&#39;t include `config.h` in `zookeeper.h`
+* [ZOOKEEPER-2906](https://issues.apache.org/jira/browse/ZOOKEEPER-2906) - The OWASP dependency check jar should not be included in the default classpath
+* [ZOOKEEPER-2909](https://issues.apache.org/jira/browse/ZOOKEEPER-2909) - Create ant task to generate ivy dependency reports
+* [ZOOKEEPER-2913](https://issues.apache.org/jira/browse/ZOOKEEPER-2913) - testEphemeralNodeDeletion is flaky
+* [ZOOKEEPER-2914](https://issues.apache.org/jira/browse/ZOOKEEPER-2914) - compiler warning using java 9
+* [ZOOKEEPER-2920](https://issues.apache.org/jira/browse/ZOOKEEPER-2920) - Upgrade OWASP Dependency Check to 3.2.1
+* [ZOOKEEPER-2923](https://issues.apache.org/jira/browse/ZOOKEEPER-2923) - The comment of the variable matchSyncs in class CommitProcessor has a mistake.
+* [ZOOKEEPER-2924](https://issues.apache.org/jira/browse/ZOOKEEPER-2924) - Flaky Test: org.apache.zookeeper.test.LoadFromLogTest.testRestoreWithTransactionErrors
+* [ZOOKEEPER-2926](https://issues.apache.org/jira/browse/ZOOKEEPER-2926) - Data inconsistency issue due to the flaw in the session management
+* [ZOOKEEPER-2931](https://issues.apache.org/jira/browse/ZOOKEEPER-2931) - WriteLock recipe: incorrect znode ordering when the sessionId is part of the znode name
+* [ZOOKEEPER-2934](https://issues.apache.org/jira/browse/ZOOKEEPER-2934) - c versions of election and queue recipes do not compile
+* [ZOOKEEPER-2936](https://issues.apache.org/jira/browse/ZOOKEEPER-2936) - Duplicate Keys in log4j.properties config files
+* [ZOOKEEPER-2944](https://issues.apache.org/jira/browse/ZOOKEEPER-2944) - Specify correct overflow value
+* [ZOOKEEPER-2948](https://issues.apache.org/jira/browse/ZOOKEEPER-2948) - Failing c unit tests on apache jenkins
+* [ZOOKEEPER-2949](https://issues.apache.org/jira/browse/ZOOKEEPER-2949) - SSL ServerName not set when using hostname, some proxies may failed to proxy the request.
+* [ZOOKEEPER-2951](https://issues.apache.org/jira/browse/ZOOKEEPER-2951) - zkServer.cmd does not start when JAVA_HOME ends with a \
+* [ZOOKEEPER-2953](https://issues.apache.org/jira/browse/ZOOKEEPER-2953) - Flaky Test: testNoLogBeforeLeaderEstablishment
+* [ZOOKEEPER-2959](https://issues.apache.org/jira/browse/ZOOKEEPER-2959) - ignore accepted epoch and LEADERINFO ack from observers when a newly elected leader computes new epoch
+* [ZOOKEEPER-2961](https://issues.apache.org/jira/browse/ZOOKEEPER-2961) - Fix testElectionFraud Flakyness
+* [ZOOKEEPER-2964](https://issues.apache.org/jira/browse/ZOOKEEPER-2964) - &quot;Conf&quot; command returns dataDir and dataLogDir opposingly
+* [ZOOKEEPER-2978](https://issues.apache.org/jira/browse/ZOOKEEPER-2978) - fix potential null pointer exception when deleting node
+* [ZOOKEEPER-2982](https://issues.apache.org/jira/browse/ZOOKEEPER-2982) - Re-try DNS hostname -&gt; IP resolution
+* [ZOOKEEPER-2988](https://issues.apache.org/jira/browse/ZOOKEEPER-2988) - NPE triggered if server receives a vote for a server id not in their voting view
+* [ZOOKEEPER-2992](https://issues.apache.org/jira/browse/ZOOKEEPER-2992) - The eclipse build target fails due to protocol redirection: http-&gt;https
+* [ZOOKEEPER-2993](https://issues.apache.org/jira/browse/ZOOKEEPER-2993) - .ignore file prevents adding src/java/main/org/apache/jute/compiler/generated dir to git repo
+* [ZOOKEEPER-2997](https://issues.apache.org/jira/browse/ZOOKEEPER-2997) - CMake should not force static CRT linking
+* [ZOOKEEPER-2998](https://issues.apache.org/jira/browse/ZOOKEEPER-2998) - CMake declares incorrect ZooKeeper version
+* [ZOOKEEPER-3001](https://issues.apache.org/jira/browse/ZOOKEEPER-3001) - Incorrect log message when try to delete container node
+* [ZOOKEEPER-3006](https://issues.apache.org/jira/browse/ZOOKEEPER-3006) - Potential NPE in ZKDatabase#calculateTxnLogSizeLimit
+* [ZOOKEEPER-3007](https://issues.apache.org/jira/browse/ZOOKEEPER-3007) - Potential NPE in ReferenceCountedACLCache#deserialize 
+* [ZOOKEEPER-3009](https://issues.apache.org/jira/browse/ZOOKEEPER-3009) - Potential NPE in NIOServerCnxnFactory
+* [ZOOKEEPER-3025](https://issues.apache.org/jira/browse/ZOOKEEPER-3025) - cmake windows build is broken on jenkins
+* [ZOOKEEPER-3027](https://issues.apache.org/jira/browse/ZOOKEEPER-3027) - Accidently removed public API of FileTxnLog.setPreallocSize()
+* [ZOOKEEPER-3034](https://issues.apache.org/jira/browse/ZOOKEEPER-3034) - Facing issues while building from source
+* [ZOOKEEPER-3038](https://issues.apache.org/jira/browse/ZOOKEEPER-3038) - Cleanup some nitpicks in TTL implementation
+* [ZOOKEEPER-3039](https://issues.apache.org/jira/browse/ZOOKEEPER-3039) - TxnLogToolkit uses Scanner badly
+* [ZOOKEEPER-3041](https://issues.apache.org/jira/browse/ZOOKEEPER-3041) - Typo in error message, affects log analysis
+* [ZOOKEEPER-3050](https://issues.apache.org/jira/browse/ZOOKEEPER-3050) - owasp ant target is highlighting jetty version needs to be updated
+* [ZOOKEEPER-3051](https://issues.apache.org/jira/browse/ZOOKEEPER-3051) - owasp complaining about jackson version used
+* [ZOOKEEPER-3056](https://issues.apache.org/jira/browse/ZOOKEEPER-3056) - Fails to load database with missing snapshot file but valid transaction log file
+* [ZOOKEEPER-3057](https://issues.apache.org/jira/browse/ZOOKEEPER-3057) - Fix IPv6 literal usage
+* [ZOOKEEPER-3059](https://issues.apache.org/jira/browse/ZOOKEEPER-3059) - EventThread leak in case of Sasl AuthFailed
+* [ZOOKEEPER-3072](https://issues.apache.org/jira/browse/ZOOKEEPER-3072) - Race condition in throttling
+* [ZOOKEEPER-3079](https://issues.apache.org/jira/browse/ZOOKEEPER-3079) - Fix unsafe use of sprintf(3) for creating IP address strings
+* [ZOOKEEPER-3082](https://issues.apache.org/jira/browse/ZOOKEEPER-3082) - Fix server snapshot behavior when out of disk space
+* [ZOOKEEPER-3093](https://issues.apache.org/jira/browse/ZOOKEEPER-3093) - sync zerror(int rc) with newest error definitions
+* [ZOOKEEPER-3104](https://issues.apache.org/jira/browse/ZOOKEEPER-3104) - Potential data inconsistency due to NEWLEADER packet being sent too early during SNAP sync
+* [ZOOKEEPER-3105](https://issues.apache.org/jira/browse/ZOOKEEPER-3105) - Character coding problem occur when create a node using python3
+* [ZOOKEEPER-3113](https://issues.apache.org/jira/browse/ZOOKEEPER-3113) - EphemeralType.get() fails to verify ephemeralOwner when currentElapsedTime() is small enough
+* [ZOOKEEPER-3117](https://issues.apache.org/jira/browse/ZOOKEEPER-3117) - Correct the LeaderBean.followerInfo to only return the followers list
+* [ZOOKEEPER-3125](https://issues.apache.org/jira/browse/ZOOKEEPER-3125) - Pzxid inconsistent issue when replaying a txn for a deleted node
+* [ZOOKEEPER-3127](https://issues.apache.org/jira/browse/ZOOKEEPER-3127) - Fixing potential data inconsistency due to update last processed zxid with partial multi-op txn
+* [ZOOKEEPER-3131](https://issues.apache.org/jira/browse/ZOOKEEPER-3131) - org.apache.zookeeper.server.WatchManager resource leak
+* [ZOOKEEPER-3144](https://issues.apache.org/jira/browse/ZOOKEEPER-3144) - Potential ephemeral nodes inconsistent due to global session inconsistent with fuzzy snapshot
+* [ZOOKEEPER-3145](https://issues.apache.org/jira/browse/ZOOKEEPER-3145) - Potential watch missing issue due to stale pzxid when replaying CloseSession txn with fuzzy snapshot
+* [ZOOKEEPER-3156](https://issues.apache.org/jira/browse/ZOOKEEPER-3156) - ZOOKEEPER-2184 causes kerberos principal to not have resolved host name
+* [ZOOKEEPER-3162](https://issues.apache.org/jira/browse/ZOOKEEPER-3162) - Broken lock semantics in C client lock-recipe
+* [ZOOKEEPER-3210](https://issues.apache.org/jira/browse/ZOOKEEPER-3210) - Typo in zookeeperInternals doc
+* [ZOOKEEPER-3212](https://issues.apache.org/jira/browse/ZOOKEEPER-3212) - Fix website with adding doap.rdf back
+* [ZOOKEEPER-3217](https://issues.apache.org/jira/browse/ZOOKEEPER-3217) - owasp job flagging slf4j on trunk
+* [ZOOKEEPER-3218](https://issues.apache.org/jira/browse/ZOOKEEPER-3218) - zk server reopened,the interval for observer connect to the new leader is too long,then session expired
+* [ZOOKEEPER-3253](https://issues.apache.org/jira/browse/ZOOKEEPER-3253) - client should not send requests with cxid=-4, -2, or -1
+* [ZOOKEEPER-3265](https://issues.apache.org/jira/browse/ZOOKEEPER-3265) - Build failure on branch-3.4
+* [ZOOKEEPER-3296](https://issues.apache.org/jira/browse/ZOOKEEPER-3296) - Cannot join quorum due to Quorum SSLSocket connection not closed explicitly when there is handshake issue
+* [ZOOKEEPER-3306](https://issues.apache.org/jira/browse/ZOOKEEPER-3306) - Node may not accessible due the the inconsistent ACL reference map after SNAP sync 
+* [ZOOKEEPER-3320](https://issues.apache.org/jira/browse/ZOOKEEPER-3320) - Leader election port stop listen when hostname unresolvable for some time 
+* [ZOOKEEPER-3356](https://issues.apache.org/jira/browse/ZOOKEEPER-3356) - Request throttling in Netty is not working as expected and could cause direct buffer OOM issue 
+* [ZOOKEEPER-3373](https://issues.apache.org/jira/browse/ZOOKEEPER-3373) - need change description for &quot;Single System Image&quot; guarantee in document
+* [ZOOKEEPER-3399](https://issues.apache.org/jira/browse/ZOOKEEPER-3399) - Remove logging in getGlobalOutstandingLimit for optimal performance.
+* [ZOOKEEPER-3404](https://issues.apache.org/jira/browse/ZOOKEEPER-3404) - BouncyCastle upgrade to 1.61 might cause flaky test issues
+* [ZOOKEEPER-3405](https://issues.apache.org/jira/browse/ZOOKEEPER-3405) - owasp flagging jackson-databind
+* [ZOOKEEPER-3433](https://issues.apache.org/jira/browse/ZOOKEEPER-3433) - zkpython build broken after maven migration
+* [ZOOKEEPER-3440](https://issues.apache.org/jira/browse/ZOOKEEPER-3440) - Fix Apache RAT check by excluding binary files (images)
+* [ZOOKEEPER-3471](https://issues.apache.org/jira/browse/ZOOKEEPER-3471) - Potential lock unavailable due to dangling ephemeral nodes left during local session upgrading
+* [ZOOKEEPER-3479](https://issues.apache.org/jira/browse/ZOOKEEPER-3479) - Logging false leader election times
+* [ZOOKEEPER-3496](https://issues.apache.org/jira/browse/ZOOKEEPER-3496) - Transaction larger than jute.maxbuffer makes ZooKeeper unavailable
+* [ZOOKEEPER-3498](https://issues.apache.org/jira/browse/ZOOKEEPER-3498) - In zookeeper-jute project generated source should not be in target\classes folder
+* [ZOOKEEPER-3510](https://issues.apache.org/jira/browse/ZOOKEEPER-3510) - Frequent &#39;zkServer.sh stop&#39; failures when running C test suite
+* [ZOOKEEPER-3518](https://issues.apache.org/jira/browse/ZOOKEEPER-3518) - owasp check flagging jackson-databind 2.9.9.1
+* [ZOOKEEPER-3531](https://issues.apache.org/jira/browse/ZOOKEEPER-3531) - Synchronization on ACLCache cause cluster to hang when network/disk issues happen during datatree serialization
+* [ZOOKEEPER-3540](https://issues.apache.org/jira/browse/ZOOKEEPER-3540) - Client port unavailable after binding the same client port during reconfig
+* [ZOOKEEPER-3546](https://issues.apache.org/jira/browse/ZOOKEEPER-3546) - Containers that never have children stay forever
+* [ZOOKEEPER-3559](https://issues.apache.org/jira/browse/ZOOKEEPER-3559) - Update Jackson to 2.9.10
+* [ZOOKEEPER-3563](https://issues.apache.org/jira/browse/ZOOKEEPER-3563) - dependency check failing on 3.4 and 3.5 branches - CVE-2019-16869 on Netty
+* [ZOOKEEPER-3590](https://issues.apache.org/jira/browse/ZOOKEEPER-3590) - Zookeeper is unable to set the zookeeper.sasl.client.canonicalize.hostname using system variable
+* [ZOOKEEPER-3605](https://issues.apache.org/jira/browse/ZOOKEEPER-3605) - ZOOKEEPER-3242 add a connection throttle. Default constructor needs to set it
+* [ZOOKEEPER-3633](https://issues.apache.org/jira/browse/ZOOKEEPER-3633) - AdminServer commands throw NPE when only secure client port is used
+* [ZOOKEEPER-3641](https://issues.apache.org/jira/browse/ZOOKEEPER-3641) - New ZOO_VERSION define breaks Perl &amp; Python contribs
+* [ZOOKEEPER-3651](https://issues.apache.org/jira/browse/ZOOKEEPER-3651) - NettyServerCnxnFactoryTest is flaky
+* [ZOOKEEPER-3653](https://issues.apache.org/jira/browse/ZOOKEEPER-3653) - Audit Log feature fails in a stand alone zookeeper setup
+
+## Test
+
+* [ZOOKEEPER-1441](https://issues.apache.org/jira/browse/ZOOKEEPER-1441) - Some test cases are failing because Port bind issue.
+* [ZOOKEEPER-2017](https://issues.apache.org/jira/browse/ZOOKEEPER-2017) - New tests for reconfig failure cases
+* [ZOOKEEPER-2204](https://issues.apache.org/jira/browse/ZOOKEEPER-2204) - LearnerSnapshotThrottlerTest.testHighContentionWithTimeout fails occasionally
+* [ZOOKEEPER-2415](https://issues.apache.org/jira/browse/ZOOKEEPER-2415) - SessionTest is using Thread deprecated API.
+* [ZOOKEEPER-2484](https://issues.apache.org/jira/browse/ZOOKEEPER-2484) - Flaky Test: org.apache.zookeeper.test.LoadFromLogTest.testLoadFailure
+* [ZOOKEEPER-2508](https://issues.apache.org/jira/browse/ZOOKEEPER-2508) - Many ZooKeeper tests are flaky because they proceed with zk operation without connecting to ZooKeeper server.
+* [ZOOKEEPER-2577](https://issues.apache.org/jira/browse/ZOOKEEPER-2577) - Flaky Test: org.apache.zookeeper.server.quorum.ReconfigDuringLeaderSyncTest.testDuringLeaderSync
+* [ZOOKEEPER-2656](https://issues.apache.org/jira/browse/ZOOKEEPER-2656) - Fix ServerConfigTest#testValidArguments test case failures
+* [ZOOKEEPER-2664](https://issues.apache.org/jira/browse/ZOOKEEPER-2664) - ClientPortBindTest#testBindByAddress may fail due to &quot;No such device&quot; exception
+* [ZOOKEEPER-2686](https://issues.apache.org/jira/browse/ZOOKEEPER-2686) - Flaky Test: org.apache.zookeeper.test.WatcherTest.
+* [ZOOKEEPER-2716](https://issues.apache.org/jira/browse/ZOOKEEPER-2716) - Flaky Test: org.apache.zookeeper.server.SessionTrackerTest.testAddSessionAfterSessionExpiry
+* [ZOOKEEPER-2718](https://issues.apache.org/jira/browse/ZOOKEEPER-2718) - org.apache.zookeeper.server.quorum.StandaloneDisabledTest fails intermittently
+* [ZOOKEEPER-2742](https://issues.apache.org/jira/browse/ZOOKEEPER-2742) - Few test cases of org.apache.zookeeper.ZooKeeperTest fails in Windows
+* [ZOOKEEPER-2746](https://issues.apache.org/jira/browse/ZOOKEEPER-2746) - Leader hand-off during dynamic reconfig is best effort, while test always expects it
+* [ZOOKEEPER-2796](https://issues.apache.org/jira/browse/ZOOKEEPER-2796) - Test org.apache.zookeeper.ZooKeeperTest.testCreateNodeWithoutData is broken by ZOOKEEPER-2757
+* [ZOOKEEPER-2955](https://issues.apache.org/jira/browse/ZOOKEEPER-2955) - Enable Clover code coverage report
+* [ZOOKEEPER-2968](https://issues.apache.org/jira/browse/ZOOKEEPER-2968) - Add C client code coverage tests
+* [ZOOKEEPER-3074](https://issues.apache.org/jira/browse/ZOOKEEPER-3074) - Flaky test:org.apache.zookeeper.server.ServerStatsTest.testLatencyMetrics
+* [ZOOKEEPER-3157](https://issues.apache.org/jira/browse/ZOOKEEPER-3157) - Improve FuzzySnapshotRelatedTest to avoid flaky due to issues like connection loss
+* [ZOOKEEPER-3205](https://issues.apache.org/jira/browse/ZOOKEEPER-3205) - Jute - o.a.jute.BinaryInputArchive Test cases
+* [ZOOKEEPER-3455](https://issues.apache.org/jira/browse/ZOOKEEPER-3455) - Java 13 build failure on trunk: UnifiedServerSocketTest.testConnectWithoutSSLToStrictServer
+* [ZOOKEEPER-3480](https://issues.apache.org/jira/browse/ZOOKEEPER-3480) - Flaky test CommitProcessorMetricsTest.testConcurrentRequestProcessingInCommitProcessor
+* [ZOOKEEPER-3495](https://issues.apache.org/jira/browse/ZOOKEEPER-3495) - Broken test in JDK12+: SnapshotDigestTest.testDifferentDigestVersion
+* [ZOOKEEPER-3542](https://issues.apache.org/jira/browse/ZOOKEEPER-3542) - X509UtilTest#testClientRenegotiationFails is flaky on JDK8 + linux on machines with 2 cores
+
+## Wish
+
+* [ZOOKEEPER-2795](https://issues.apache.org/jira/browse/ZOOKEEPER-2795) - Change log level for &quot;ZKShutdownHandler is not registered&quot; error message
+* [ZOOKEEPER-3073](https://issues.apache.org/jira/browse/ZOOKEEPER-3073) - fix couple of typos
+* [ZOOKEEPER-3302](https://issues.apache.org/jira/browse/ZOOKEEPER-3302) - ZooKeeper C client does not compile on Fedora 29 
+* [ZOOKEEPER-3421](https://issues.apache.org/jira/browse/ZOOKEEPER-3421) - Better insight into Observer connections
+
+## Task
+
+* [ZOOKEEPER-925](https://issues.apache.org/jira/browse/ZOOKEEPER-925) - Consider maven site generation to replace our forrest site and documentation generation
+* [ZOOKEEPER-1604](https://issues.apache.org/jira/browse/ZOOKEEPER-1604) - remove rpm/deb/... packaging
+* [ZOOKEEPER-2658](https://issues.apache.org/jira/browse/ZOOKEEPER-2658) - Trunk / branch-3.5 build broken.
+* [ZOOKEEPER-2709](https://issues.apache.org/jira/browse/ZOOKEEPER-2709) - Clarify documentation around &quot;auth&quot; ACL scheme
+* [ZOOKEEPER-3002](https://issues.apache.org/jira/browse/ZOOKEEPER-3002) - Upgrade branches 3.5 and trunk to Java 1.8
+* [ZOOKEEPER-3017](https://issues.apache.org/jira/browse/ZOOKEEPER-3017) - Link libm in CMake on FreeBSD
+* [ZOOKEEPER-3061](https://issues.apache.org/jira/browse/ZOOKEEPER-3061) - add more details to &#39;Unhandled scenario for peer&#39; log.warn message
+* [ZOOKEEPER-3062](https://issues.apache.org/jira/browse/ZOOKEEPER-3062) - introduce fsync.warningthresholdms constant for FileTxnLog LOG.warn message
+* [ZOOKEEPER-3067](https://issues.apache.org/jira/browse/ZOOKEEPER-3067) - Optionally suppress client environment logging.
+* [ZOOKEEPER-3087](https://issues.apache.org/jira/browse/ZOOKEEPER-3087) - Fix findbug warning introduced by ZOOKEEPER-3084.
+* [ZOOKEEPER-3120](https://issues.apache.org/jira/browse/ZOOKEEPER-3120) - add NetBeans nbproject directory to .gitignore
+* [ZOOKEEPER-3136](https://issues.apache.org/jira/browse/ZOOKEEPER-3136) - Reduce log in ClientBase in case of ConnectException
+* [ZOOKEEPER-3197](https://issues.apache.org/jira/browse/ZOOKEEPER-3197) - Improve documentation in ZooKeeperServer.superSecret
+* [ZOOKEEPER-3230](https://issues.apache.org/jira/browse/ZOOKEEPER-3230) - Add Apache NetBeans Maven project files to .gitignore
+* [ZOOKEEPER-3362](https://issues.apache.org/jira/browse/ZOOKEEPER-3362) - Create a simple checkstyle file
+* [ZOOKEEPER-3406](https://issues.apache.org/jira/browse/ZOOKEEPER-3406) - Update website for new mailing lists
+* [ZOOKEEPER-3407](https://issues.apache.org/jira/browse/ZOOKEEPER-3407) - Update POM file with new information
+* [ZOOKEEPER-3431](https://issues.apache.org/jira/browse/ZOOKEEPER-3431) - Enable BookKeeper checkstyle configuration
+* [ZOOKEEPER-3441](https://issues.apache.org/jira/browse/ZOOKEEPER-3441) - OWASP is flagging jackson-databind-2.9.9.jar for CVE-2019-12814
+* [ZOOKEEPER-3545](https://issues.apache.org/jira/browse/ZOOKEEPER-3545) - Fix LICENSE files for netty dependency
+
+## Sub-task
+
+* [ZOOKEEPER-169](https://issues.apache.org/jira/browse/ZOOKEEPER-169) - Content needed: &quot;Connecting to ZooKeeper&quot;
+* [ZOOKEEPER-236](https://issues.apache.org/jira/browse/ZOOKEEPER-236) - SSL Support for Atomic Broadcast protocol
+* [ZOOKEEPER-1626](https://issues.apache.org/jira/browse/ZOOKEEPER-1626) - Zookeeper C client should be tolerant of clock adjustments 
+* [ZOOKEEPER-1660](https://issues.apache.org/jira/browse/ZOOKEEPER-1660) - Add documentation for dynamic reconfiguration
+* [ZOOKEEPER-1872](https://issues.apache.org/jira/browse/ZOOKEEPER-1872) - QuorumPeer is not shutdown in few cases
+* [ZOOKEEPER-2047](https://issues.apache.org/jira/browse/ZOOKEEPER-2047) - testTruncationNullLog fails on windows
+* [ZOOKEEPER-2069](https://issues.apache.org/jira/browse/ZOOKEEPER-2069) - Netty Support for ClientCnxnSocket
+* [ZOOKEEPER-2080](https://issues.apache.org/jira/browse/ZOOKEEPER-2080) - Fix deadlock in dynamic reconfiguration
+* [ZOOKEEPER-2119](https://issues.apache.org/jira/browse/ZOOKEEPER-2119) - Netty client docs
+* [ZOOKEEPER-2122](https://issues.apache.org/jira/browse/ZOOKEEPER-2122) - Impplement SSL support in the Zookeeper C client library
+* [ZOOKEEPER-2123](https://issues.apache.org/jira/browse/ZOOKEEPER-2123) - Provide implementation of X509 AuthenticationProvider
+* [ZOOKEEPER-2125](https://issues.apache.org/jira/browse/ZOOKEEPER-2125) - SSL on Netty client-server communication
+* [ZOOKEEPER-2134](https://issues.apache.org/jira/browse/ZOOKEEPER-2134) - AsyncHammerTest.testHammer fails intermittently
+* [ZOOKEEPER-2137](https://issues.apache.org/jira/browse/ZOOKEEPER-2137) - Make testPortChange() less flaky
+* [ZOOKEEPER-2152](https://issues.apache.org/jira/browse/ZOOKEEPER-2152) - Intermittent failure in TestReconfig.cc
+* [ZOOKEEPER-2153](https://issues.apache.org/jira/browse/ZOOKEEPER-2153) - X509 Authentication Documentation
+* [ZOOKEEPER-2168](https://issues.apache.org/jira/browse/ZOOKEEPER-2168) - Add C APIs for new createContainer Methods
+* [ZOOKEEPER-2396](https://issues.apache.org/jira/browse/ZOOKEEPER-2396) - Login object in ZooKeeperSaslClient is static
+* [ZOOKEEPER-2608](https://issues.apache.org/jira/browse/ZOOKEEPER-2608) - Create CLI option for TTL ephemerals
+* [ZOOKEEPER-2609](https://issues.apache.org/jira/browse/ZOOKEEPER-2609) - Add TTL Node APIs to C client
+* [ZOOKEEPER-2692](https://issues.apache.org/jira/browse/ZOOKEEPER-2692) - Fix race condition in testWatchAutoResetWithPending
+* [ZOOKEEPER-2707](https://issues.apache.org/jira/browse/ZOOKEEPER-2707) - Fix &quot;Unexpected bean exists!&quot; issue in WatcherTests
+* [ZOOKEEPER-2750](https://issues.apache.org/jira/browse/ZOOKEEPER-2750) - Document SSL Support for Atomic Broadcast protocol
+* [ZOOKEEPER-2753](https://issues.apache.org/jira/browse/ZOOKEEPER-2753) - Introduce a python script for generating flaky test report
+* [ZOOKEEPER-2754](https://issues.apache.org/jira/browse/ZOOKEEPER-2754) - Set up Apache Jenkins job that runs the flaky test analyzer script.
+* [ZOOKEEPER-2935](https://issues.apache.org/jira/browse/ZOOKEEPER-2935) - [QP MutualAuth]: Port ZOOKEEPER-1045 implementation from branch-3.5 to trunk
+* [ZOOKEEPER-2939](https://issues.apache.org/jira/browse/ZOOKEEPER-2939) - Deal with maxbuffer as it relates to proposals
+* [ZOOKEEPER-2940](https://issues.apache.org/jira/browse/ZOOKEEPER-2940) - Deal with maxbuffer as it relates to large requests from clients
+* [ZOOKEEPER-3022](https://issues.apache.org/jira/browse/ZOOKEEPER-3022) - Step 1.1 - Create docs and it maven structure
+* [ZOOKEEPER-3028](https://issues.apache.org/jira/browse/ZOOKEEPER-3028) - Create assembly in pom.xml
+* [ZOOKEEPER-3029](https://issues.apache.org/jira/browse/ZOOKEEPER-3029) - Create pom files for jute, server and client
+* [ZOOKEEPER-3030](https://issues.apache.org/jira/browse/ZOOKEEPER-3030) - Step 1.3 - Create zk-contrib maven structure
+* [ZOOKEEPER-3031](https://issues.apache.org/jira/browse/ZOOKEEPER-3031) - Step 1.4 - Create zk-client maven structure
+* [ZOOKEEPER-3032](https://issues.apache.org/jira/browse/ZOOKEEPER-3032) - Step 1.6 - Create zk-server maven structure
+* [ZOOKEEPER-3033](https://issues.apache.org/jira/browse/ZOOKEEPER-3033) - Step 1.2 - Create zk-recipes maven structure
+* [ZOOKEEPER-3046](https://issues.apache.org/jira/browse/ZOOKEEPER-3046) - testManyChildWatchersAutoReset is flaky
+* [ZOOKEEPER-3080](https://issues.apache.org/jira/browse/ZOOKEEPER-3080) - Step 1.5 - Separate jute structure
+* [ZOOKEEPER-3103](https://issues.apache.org/jira/browse/ZOOKEEPER-3103) - Pluggable metrics system for ZooKeeper - MetricsProvider API definition
+* [ZOOKEEPER-3123](https://issues.apache.org/jira/browse/ZOOKEEPER-3123) - MetricsProvider Lifecycle in ZooKeeper Server
+* [ZOOKEEPER-3143](https://issues.apache.org/jira/browse/ZOOKEEPER-3143) - Pluggable metrics system for ZooKeeper - Data Collection on Server
+* [ZOOKEEPER-3150](https://issues.apache.org/jira/browse/ZOOKEEPER-3150) - Data integrity check when loading snapshot/txns from disk
+* [ZOOKEEPER-3153](https://issues.apache.org/jira/browse/ZOOKEEPER-3153) - Create MarkDown files and build process for them
+* [ZOOKEEPER-3154](https://issues.apache.org/jira/browse/ZOOKEEPER-3154) - Update release process to use the MarkDown solution
+* [ZOOKEEPER-3155](https://issues.apache.org/jira/browse/ZOOKEEPER-3155) - Remove Forrest XMLs and their build process from the project
+* [ZOOKEEPER-3171](https://issues.apache.org/jira/browse/ZOOKEEPER-3171) - Create pom.xml for recipes and contrib
+* [ZOOKEEPER-3172](https://issues.apache.org/jira/browse/ZOOKEEPER-3172) - Quorum TLS - fix port unification to allow rolling upgrades
+* [ZOOKEEPER-3173](https://issues.apache.org/jira/browse/ZOOKEEPER-3173) - Quorum TLS - support PEM trust/key stores
+* [ZOOKEEPER-3174](https://issues.apache.org/jira/browse/ZOOKEEPER-3174) - Quorum TLS - support reloading trust/key store
+* [ZOOKEEPER-3175](https://issues.apache.org/jira/browse/ZOOKEEPER-3175) - Quorum TLS - test improvements
+* [ZOOKEEPER-3176](https://issues.apache.org/jira/browse/ZOOKEEPER-3176) - Quorum TLS - add SSL config options
+* [ZOOKEEPER-3193](https://issues.apache.org/jira/browse/ZOOKEEPER-3193) - Flaky: org.apache.zookeeper.test.SaslAuthFailNotifyTest
+* [ZOOKEEPER-3194](https://issues.apache.org/jira/browse/ZOOKEEPER-3194) - Quorum TLS - fix copy/paste bug in ZKTrustManager
+* [ZOOKEEPER-3202](https://issues.apache.org/jira/browse/ZOOKEEPER-3202) - Flaky test: org.apache.zookeeper.test.ClientSSLTest.testClientServerSSL
+* [ZOOKEEPER-3222](https://issues.apache.org/jira/browse/ZOOKEEPER-3222) - Flaky: multiple intermittent segfaults in C++ tests
+* [ZOOKEEPER-3223](https://issues.apache.org/jira/browse/ZOOKEEPER-3223) - Configure Spotbugs
+* [ZOOKEEPER-3224](https://issues.apache.org/jira/browse/ZOOKEEPER-3224) - CI integration with maven
+* [ZOOKEEPER-3225](https://issues.apache.org/jira/browse/ZOOKEEPER-3225) - Create code coverage analysis with maven build
+* [ZOOKEEPER-3226](https://issues.apache.org/jira/browse/ZOOKEEPER-3226) - Activate C Client with a profile, disabled by default
+* [ZOOKEEPER-3229](https://issues.apache.org/jira/browse/ZOOKEEPER-3229) - [TLS] add AES-256 ciphers to default cipher list
+* [ZOOKEEPER-3233](https://issues.apache.org/jira/browse/ZOOKEEPER-3233) - Run github pre-commit hook tests on 4 threads
+* [ZOOKEEPER-3251](https://issues.apache.org/jira/browse/ZOOKEEPER-3251) - Add new server metric types: percentile counter and counter set
+* [ZOOKEEPER-3256](https://issues.apache.org/jira/browse/ZOOKEEPER-3256) - Enable OWASP checks  to Maven build
+* [ZOOKEEPER-3267](https://issues.apache.org/jira/browse/ZOOKEEPER-3267) - Add watcher metrics
+* [ZOOKEEPER-3268](https://issues.apache.org/jira/browse/ZOOKEEPER-3268) - Add commit processor metrics
+* [ZOOKEEPER-3275](https://issues.apache.org/jira/browse/ZOOKEEPER-3275) - Fix release targets: package, tar, mvn-deploy
+* [ZOOKEEPER-3285](https://issues.apache.org/jira/browse/ZOOKEEPER-3285) - Move assembly into its own sub-module
+* [ZOOKEEPER-3288](https://issues.apache.org/jira/browse/ZOOKEEPER-3288) - add a new doc:ZookeeperCLI.md
+* [ZOOKEEPER-3301](https://issues.apache.org/jira/browse/ZOOKEEPER-3301) - Enforce the quota limit
+* [ZOOKEEPER-3305](https://issues.apache.org/jira/browse/ZOOKEEPER-3305) - Add Quorum Packet metrics
+* [ZOOKEEPER-3309](https://issues.apache.org/jira/browse/ZOOKEEPER-3309) - Add sync processor metrics
+* [ZOOKEEPER-3310](https://issues.apache.org/jira/browse/ZOOKEEPER-3310) - Add metrics for prep processor
+* [ZOOKEEPER-3319](https://issues.apache.org/jira/browse/ZOOKEEPER-3319) - Add metrics for follower and observer
+* [ZOOKEEPER-3321](https://issues.apache.org/jira/browse/ZOOKEEPER-3321) - Add metrics for Leader
+* [ZOOKEEPER-3323](https://issues.apache.org/jira/browse/ZOOKEEPER-3323) - Add TxnSnapLog metrics
+* [ZOOKEEPER-3324](https://issues.apache.org/jira/browse/ZOOKEEPER-3324) - Add read/write metrics for top level znodes
+* [ZOOKEEPER-3326](https://issues.apache.org/jira/browse/ZOOKEEPER-3326) - Add session/connection related metrics
+* [ZOOKEEPER-3327](https://issues.apache.org/jira/browse/ZOOKEEPER-3327) - Add unrecoverable error count
+* [ZOOKEEPER-3366](https://issues.apache.org/jira/browse/ZOOKEEPER-3366) - Pluggable metrics system for ZooKeeper - move remaining metrics to MetricsProvider
+* [ZOOKEEPER-3379](https://issues.apache.org/jira/browse/ZOOKEEPER-3379) - De-flaky test in Quorum Packet Metrics
+* [ZOOKEEPER-3383](https://issues.apache.org/jira/browse/ZOOKEEPER-3383) - Improve prep processor metric accuracy and de-flaky unit test
+* [ZOOKEEPER-3401](https://issues.apache.org/jira/browse/ZOOKEEPER-3401) - Fix metric PROPOSAL_ACK_CREATION_LATENCY
+* [ZOOKEEPER-3409](https://issues.apache.org/jira/browse/ZOOKEEPER-3409) - Compile Java code with -Xdoclint
+* [ZOOKEEPER-3443](https://issues.apache.org/jira/browse/ZOOKEEPER-3443) - Add support for PKCS12 trust/key stores
+* [ZOOKEEPER-3465](https://issues.apache.org/jira/browse/ZOOKEEPER-3465) - Introduce BookKeeper checkstyle configuration
+* [ZOOKEEPER-3470](https://issues.apache.org/jira/browse/ZOOKEEPER-3470) - Flaky test: LearnerMetricsTest.testLearnerMetricsTest()
+* [ZOOKEEPER-3474](https://issues.apache.org/jira/browse/ZOOKEEPER-3474) - Enable BookKeeper checkstyle configuration on zookeeper-promethus
+* [ZOOKEEPER-3475](https://issues.apache.org/jira/browse/ZOOKEEPER-3475) - Enable BookKeeper checkstyle configuration on zookeeper-server
+* [ZOOKEEPER-3512](https://issues.apache.org/jira/browse/ZOOKEEPER-3512) - Real time data integrity check during broadcast time
+* [ZOOKEEPER-3517](https://issues.apache.org/jira/browse/ZOOKEEPER-3517) - Turn on BookKeeper checkstyle configuration at project level
+* [ZOOKEEPER-3528](https://issues.apache.org/jira/browse/ZOOKEEPER-3528) - Revisit AsyncCallback javadoc
+* [ZOOKEEPER-3529](https://issues.apache.org/jira/browse/ZOOKEEPER-3529) - add a new doc: zookeeperUseCases.md
+
+                                                                                                                                            
+
+
+
 
-These release notes include new developer and user facing incompatibilities, features, and major improvements.
 
-* [Migration Instructions](#migration)
-* [Changes](#changes)
-
-<a name="migration"></a>
-## Migration Instructions when Upgrading to 3.0.0
-<div class="section">
-
-*You should only have to read this section if you are upgrading from a previous version of ZooKeeper to version 3.0.0, otw skip down to [changes](#changes)*
 
-A small number of changes in this release have resulted in non-backward compatible Zookeeper client user code and server instance data. The following instructions provide details on how to migrate code and date from version 2.2.1 to version 3.0.0.
 
-Note: ZooKeeper increments the major version number (major.minor.fix) when backward incompatible changes are made to the source base. As part of the migration from SourceForge we changed the package structure (com.yahoo.zookeeper.* to org.apache.zookeeper.*) and felt it was a good time to incorporate some changes that we had been withholding. As a result the following will be required when migrating from 2.2.1 to 3.0.0 version of ZooKeeper.
 
-* [Migrating Client Code](#migration_code)
-* [Migrating Server Data](#migration_data)
-* [Migrating Server Configuration](#migration_config)
 
-<a name="migration_code"></a>
-### Migrating Client Code
 
-The underlying client-server protocol has changed in version 3.0.0
-of ZooKeeper. As a result clients must be upgraded along with
-serving clusters to ensure proper operation of the system (old
-pre-3.0.0 clients are not guaranteed to operate against upgraded
-3.0.0 servers and vice-versa).
 
-<a name="Watch+Management"></a>
-#### Watch Management
 
-In previous releases of ZooKeeper any watches registered by clients were lost if the client lost a connection to a ZooKeeper server.
-This meant that developers had to track watches they were interested in and reregister them if a session disconnect event was received.
-In this release the client library tracks watches that a client has registered and reregisters the watches when a connection is made to a new server.
-Applications that still manually reregister interest should continue working properly as long as they are able to handle unsolicited watches.
-For example, an old application may register a watch for /foo and /goo, lose the connection, and reregister only /goo.
-As long as the application is able to receive a notification for /foo, (probably ignoring it) it does not need to be changed.
-One caveat to the watch management: it is possible to miss an event for the creation and deletion of a znode if watching for creation and both the create and delete happens while the client is disconnected from ZooKeeper.
-
-This release also allows clients to specify call specific watch functions.
-This gives the developer the ability to modularize logic in different watch functions rather than cramming everything in the watch function attached to the ZooKeeper handle.
-Call specific watch functions receive all session events for as long as they are active, but will only receive the watch callbacks for which they are registered.
-
-<a name="Java+API"></a>
-#### Java API
-
-1. The java package structure has changed from **com.yahoo.zookeeper*** to **org.apache.zookeeper***. This will probably affect all of your java code which makes use of ZooKeeper APIs (typically import statements)
-1. A number of constants used in the client ZooKeeper API were re-specified using enums (rather than ints). See [ZOOKEEPER-7](https://issues.apache.org/jira/browse/ZOOKEEPER-7), [ZOOKEEPER-132](https://issues.apache.org/jira/browse/ZOOKEEPER-132) and [ZOOKEEPER-139](https://issues.apache.org/jira/browse/ZOOKEEPER-139) for full details
-1. [ZOOKEEPER-18](https://issues.apache.org/jira/browse/ZOOKEEPER-18) removed KeeperStateChanged, use KeeperStateDisconnected instead
-
-Also see [the current Java API](http://zookeeper.apache.org/docs/current/api/index.html)
-
-<a name="C+API"></a>
-#### C API
-
-1. A number of constants used in the client ZooKeeper API were renamed in order to reduce namespace collision, see [ZOOKEEPER-6](https://issues.apache.org/jira/browse/ZOOKEEPER-6) for full details
-
-<a name="migration_data"></a>
-### Migrating Server Data
-The following issues resulted in changes to the on-disk data format (the snapshot and transaction log files contained within the ZK data directory) and require a migration utility to be run. 
-  
-* [ZOOKEEPER-27 Unique DB identifiers for servers and clients](https://issues.apache.org/jira/browse/ZOOKEEPER-27)
-* [ZOOKEEPER-32 CRCs for ZooKeeper data](https://issues.apache.org/jira/browse/ZOOKEEPER-32)
-* [ZOOKEEPER-33 Better ACL management](https://issues.apache.org/jira/browse/ZOOKEEPER-33)
-* [ZOOKEEPER-38 headers (version+) in log/snap files](https://issues.apache.org/jira/browse/ZOOKEEPER-38)
-
-**The following must be run once, and only once, when upgrading the ZooKeeper server instances to version 3.0.0.**
-
-###### Note
-> The <dataLogDir> and <dataDir> directories referenced below are specified by the *dataLogDir*
-  and *dataDir* specification in your ZooKeeper config file respectively. *dataLogDir* defaults to
-  the value of *dataDir* if not specified explicitly in the ZooKeeper server config file (in which
-  case provide the same directory for both parameters to the upgrade utility).
-
-1. Shutdown the ZooKeeper server cluster.
-1. Backup your <dataLogDir> and <dataDir> directories
-1. Run upgrade using
-    * `bin/zkServer.sh upgrade <dataLogDir> <dataDir>`
-    
-    or
-    
-    * `java -classpath pathtolog4j:pathtozookeeper.jar UpgradeMain <dataLogDir> <dataDir>`
-    
-    where <dataLogDir> is the directory where all transaction logs (log.*) are stored. <dataDir> is the directory where all the snapshots (snapshot.*) are stored.
-1. Restart the cluster.
-
-If you have any failure during the upgrade procedure keep reading to sanitize your database. 
-
-This is how upgrade works in ZooKeeper. This will help you troubleshoot in case you have problems while upgrading
-
-1. Upgrade moves files from `<dataLogDir>` and `<dataDir>` to `<dataLogDir>/version-1/` and `<dataDir>/version-1` respectively (version-1 sub-directory is created by the upgrade utility).
-1. Upgrade creates a new version sub-directory `<dataDir>/version-2` and `<dataLogDir>/version-2`
-1. Upgrade reads the old database from `<dataDir>/version-1` and `<dataLogDir>/version-1` into the memory and creates a new upgraded snapshot.
-1. Upgrade writes the new database in `<dataDir>/version-2`.
-
-Troubleshooting.
-
-
-1. In case you start ZooKeeper 3.0 without upgrading from 2.0 on a 2.0 database - the servers will start up with an empty database.
- This is because the servers assume that `<dataDir>/version-2` and `<dataLogDir>/version-2` will have the database to start with. Since this will be empty
- in case of no upgrade, the servers will start with an empty database. In such a case, shutdown the ZooKeeper servers, remove the version-2 directory (remember
- this will lead to loss of updates after you started 3.0.)
- and then start the upgrade procedure.
-1. If the upgrade fails while trying to rename files into the version-1 directory, you should try and move all the files under `<dataDir>/version-1`
- and `<dataLogDir>/version-1` to `<dataDir>` and `<dataLogDir>` respectively. Then try upgrade again.
-1. If you do not wish to run with ZooKeeper 3.0 and prefer to run with ZooKeeper 2.0 and have already upgraded - you can run ZooKeeper 2 with 
- the `<dataDir>` and `<dataLogDir>` directories changed to `<dataDir>/version-1` and `<dataLogDir>/version-1`. Remember that you will lose all the updates that you made after the upgrade.
-
-<a name="migration_config"></a>
-### Migrating Server Configuration
-
-There is a significant change to the ZooKeeper server configuration file.
-
-The default election algorithm, specified by the *electionAlg* configuration attribute, has
-changed from a default of *0* to a default of *3*. See
-[Cluster Options](zookeeperAdmin.html#sc_clusterOptions) section of the administrators guide, specifically
-the *electionAlg* and *server.X* properties.
-
-You will either need to explicitly set *electionAlg* to its previous default value
-of *0* or change your *server.X* options to include the leader election port.
-
-
-<a name="changes"></a>
-## Changes Since ZooKeeper 2.2.1
-
-Version 2.2.1 code, documentation, binaries, etc... are still accessible on [SourceForge](http://sourceforge.net/projects/zookeeper)
-
-| Issue | Notes |
-|-------|-------|
-|[ZOOKEEPER-43](https://issues.apache.org/jira/browse/ZOOKEEPER-43)|Server side of auto reset watches.|
-|[ZOOKEEPER-132](https://issues.apache.org/jira/browse/ZOOKEEPER-132)|Create Enum to replace CreateFlag in ZooKepper.create method|
-|[ZOOKEEPER-139](https://issues.apache.org/jira/browse/ZOOKEEPER-139)|Create Enums for WatcherEvent's KeeperState and EventType|
-|[ZOOKEEPER-18](https://issues.apache.org/jira/browse/ZOOKEEPER-18)|keeper state inconsistency|
-|[ZOOKEEPER-38](https://issues.apache.org/jira/browse/ZOOKEEPER-38)|headers in log/snap files|
-|[ZOOKEEPER-8](https://issues.apache.org/jira/browse/ZOOKEEPER-8)|Stat enchaned to include num of children and size|
-|[ZOOKEEPER-6](https://issues.apache.org/jira/browse/ZOOKEEPER-6)|List of problem identifiers in zookeeper.h|
-|[ZOOKEEPER-7](https://issues.apache.org/jira/browse/ZOOKEEPER-7)|Use enums rather than ints for types and state|
-|[ZOOKEEPER-27](https://issues.apache.org/jira/browse/ZOOKEEPER-27)|Unique DB identifiers for servers and clients|
-|[ZOOKEEPER-32](https://issues.apache.org/jira/browse/ZOOKEEPER-32)|CRCs for ZooKeeper data|
-|[ZOOKEEPER-33](https://issues.apache.org/jira/browse/ZOOKEEPER-33)|Better ACL management|
-|[ZOOKEEPER-203](https://issues.apache.org/jira/browse/ZOOKEEPER-203)|fix datadir typo in releasenotes|
-|[ZOOKEEPER-145](https://issues.apache.org/jira/browse/ZOOKEEPER-145)|write detailed release notes for users migrating from 2.x to 3.0|
-|[ZOOKEEPER-23](https://issues.apache.org/jira/browse/ZOOKEEPER-23)|Auto reset of watches on reconnect|
-|[ZOOKEEPER-191](https://issues.apache.org/jira/browse/ZOOKEEPER-191)|forrest docs for upgrade.|
-|[ZOOKEEPER-201](https://issues.apache.org/jira/browse/ZOOKEEPER-201)|validate magic number when reading snapshot and transaction logs|
-|[ZOOKEEPER-200](https://issues.apache.org/jira/browse/ZOOKEEPER-200)|the magic number for snapshot and log must be different|
-|[ZOOKEEPER-199](https://issues.apache.org/jira/browse/ZOOKEEPER-199)|fix log messages in persistence code|
-|[ZOOKEEPER-197](https://issues.apache.org/jira/browse/ZOOKEEPER-197)|create checksums for snapshots|
-|[ZOOKEEPER-198](https://issues.apache.org/jira/browse/ZOOKEEPER-198)|apache license header missing from FollowerSyncRequest.java|
-|[ZOOKEEPER-5](https://issues.apache.org/jira/browse/ZOOKEEPER-5)|Upgrade Feature in Zookeeper server.|
-|[ZOOKEEPER-194](https://issues.apache.org/jira/browse/ZOOKEEPER-194)|Fix terminology in zookeeperAdmin.xml|
-|[ZOOKEEPER-151](https://issues.apache.org/jira/browse/ZOOKEEPER-151)|Document change to server configuration|
-|[ZOOKEEPER-193](https://issues.apache.org/jira/browse/ZOOKEEPER-193)|update java example doc to compile with latest zookeeper|
-|[ZOOKEEPER-187](https://issues.apache.org/jira/browse/ZOOKEEPER-187)|CreateMode api docs missing|
-|[ZOOKEEPER-186](https://issues.apache.org/jira/browse/ZOOKEEPER-186)|add new "releasenotes.xml" to forrest documentation|
-|[ZOOKEEPER-190](https://issues.apache.org/jira/browse/ZOOKEEPER-190)|Reorg links to docs and navs to docs into related sections|
-|[ZOOKEEPER-189](https://issues.apache.org/jira/browse/ZOOKEEPER-189)|forrest build not validated xml of input documents|
-|[ZOOKEEPER-188](https://issues.apache.org/jira/browse/ZOOKEEPER-188)|Check that election port is present for all servers|
-|[ZOOKEEPER-185](https://issues.apache.org/jira/browse/ZOOKEEPER-185)|Improved version of FLETest|
-|[ZOOKEEPER-184](https://issues.apache.org/jira/browse/ZOOKEEPER-184)|tests: An explicit include derective is needed for the usage of memcpy functions|
-|[ZOOKEEPER-183](https://issues.apache.org/jira/browse/ZOOKEEPER-183)|Array subscript is above array bounds in od_completion, src/cli.c.|
-|[ZOOKEEPER-182](https://issues.apache.org/jira/browse/ZOOKEEPER-182)|zookeeper_init accepts empty host-port string and returns valid pointer to zhandle_t.|
-|[ZOOKEEPER-17](https://issues.apache.org/jira/browse/ZOOKEEPER-17)|zookeeper_init doc needs clarification|
-|[ZOOKEEPER-181](https://issues.apache.org/jira/browse/ZOOKEEPER-181)|Some Source Forge Documents did not get moved over: javaExample, zookeeperTutorial, zookeeperInternals|
-|[ZOOKEEPER-180](https://issues.apache.org/jira/browse/ZOOKEEPER-180)|Placeholder sections needed in document for new topics that the umbrella jira discusses|
-|[ZOOKEEPER-179](https://issues.apache.org/jira/browse/ZOOKEEPER-179)|Programmer's Guide "Basic Operations" section is missing content|
-|[ZOOKEEPER-178](https://issues.apache.org/jira/browse/ZOOKEEPER-178)|FLE test.|
-|[ZOOKEEPER-159](https://issues.apache.org/jira/browse/ZOOKEEPER-159)|Cover two corner cases of leader election|
-|[ZOOKEEPER-156](https://issues.apache.org/jira/browse/ZOOKEEPER-156)|update programmer guide with acl details from old wiki page|
-|[ZOOKEEPER-154](https://issues.apache.org/jira/browse/ZOOKEEPER-154)|reliability graph diagram in overview doc needs context|
-|[ZOOKEEPER-157](https://issues.apache.org/jira/browse/ZOOKEEPER-157)|Peer can't find existing leader|
-|[ZOOKEEPER-155](https://issues.apache.org/jira/browse/ZOOKEEPER-155)|improve "the zookeeper project" section of overview doc|
-|[ZOOKEEPER-140](https://issues.apache.org/jira/browse/ZOOKEEPER-140)|Deadlock in QuorumCnxManager|
-|[ZOOKEEPER-147](https://issues.apache.org/jira/browse/ZOOKEEPER-147)|This is version of the documents with most of the [tbd...] scrubbed out|
-|[ZOOKEEPER-150](https://issues.apache.org/jira/browse/ZOOKEEPER-150)|zookeeper build broken|
-|[ZOOKEEPER-136](https://issues.apache.org/jira/browse/ZOOKEEPER-136)|sync causes hang in all followers of quorum.|
-|[ZOOKEEPER-134](https://issues.apache.org/jira/browse/ZOOKEEPER-134)|findbugs cleanup|
-|[ZOOKEEPER-133](https://issues.apache.org/jira/browse/ZOOKEEPER-133)|hudson tests failing intermittently|
-|[ZOOKEEPER-144](https://issues.apache.org/jira/browse/ZOOKEEPER-144)|add tostring support for watcher event, and enums for event type/state|
-|[ZOOKEEPER-21](https://issues.apache.org/jira/browse/ZOOKEEPER-21)|Improve zk ctor/watcher|
-|[ZOOKEEPER-142](https://issues.apache.org/jira/browse/ZOOKEEPER-142)|Provide Javadoc as to the maximum size of the data byte array that may be stored within a znode|
-|[ZOOKEEPER-93](https://issues.apache.org/jira/browse/ZOOKEEPER-93)|Create Documentation for Zookeeper|
-|[ZOOKEEPER-117](https://issues.apache.org/jira/browse/ZOOKEEPER-117)|threading issues in Leader election|
-|[ZOOKEEPER-137](https://issues.apache.org/jira/browse/ZOOKEEPER-137)|client watcher objects can lose events|
-|[ZOOKEEPER-131](https://issues.apache.org/jira/browse/ZOOKEEPER-131)|Old leader election can elect a dead leader over and over again|
-|[ZOOKEEPER-130](https://issues.apache.org/jira/browse/ZOOKEEPER-130)|update build.xml to support apache release process|
-|[ZOOKEEPER-118](https://issues.apache.org/jira/browse/ZOOKEEPER-118)|findbugs flagged switch statement in followerrequestprocessor.run|
-|[ZOOKEEPER-115](https://issues.apache.org/jira/browse/ZOOKEEPER-115)|Potential NPE in QuorumCnxManager|
-|[ZOOKEEPER-114](https://issues.apache.org/jira/browse/ZOOKEEPER-114)|cleanup ugly event messages in zookeeper client|
-|[ZOOKEEPER-112](https://issues.apache.org/jira/browse/ZOOKEEPER-112)|src/java/main ZooKeeper.java has test code embedded into it.|
-|[ZOOKEEPER-39](https://issues.apache.org/jira/browse/ZOOKEEPER-39)|Use Watcher objects rather than boolean on read operations.|
-|[ZOOKEEPER-97](https://issues.apache.org/jira/browse/ZOOKEEPER-97)|supports optional output directory in code generator.|
-|[ZOOKEEPER-101](https://issues.apache.org/jira/browse/ZOOKEEPER-101)|Integrate ZooKeeper with "violations" feature on hudson|
-|[ZOOKEEPER-105](https://issues.apache.org/jira/browse/ZOOKEEPER-105)|Catch Zookeeper exceptions and print on the stderr.|
-|[ZOOKEEPER-42](https://issues.apache.org/jira/browse/ZOOKEEPER-42)|Change Leader Election to fast tcp.|
-|[ZOOKEEPER-48](https://issues.apache.org/jira/browse/ZOOKEEPER-48)|auth_id now handled correctly when no auth ids present|
-|[ZOOKEEPER-44](https://issues.apache.org/jira/browse/ZOOKEEPER-44)|Create sequence flag children with prefixes of 0's so that they can be lexicographically sorted.|
-|[ZOOKEEPER-108](https://issues.apache.org/jira/browse/ZOOKEEPER-108)|Fix sync operation reordering on a Quorum.|
-|[ZOOKEEPER-25](https://issues.apache.org/jira/browse/ZOOKEEPER-25)|Fuse module for Zookeeper.|
-|[ZOOKEEPER-58](https://issues.apache.org/jira/browse/ZOOKEEPER-58)|Race condition on ClientCnxn.java|
-|[ZOOKEEPER-56](https://issues.apache.org/jira/browse/ZOOKEEPER-56)|Add clover support to build.xml.|
-|[ZOOKEEPER-75](https://issues.apache.org/jira/browse/ZOOKEEPER-75)|register the ZooKeeper mailing lists with nabble.com|
-|[ZOOKEEPER-54](https://issues.apache.org/jira/browse/ZOOKEEPER-54)|remove sleeps in the tests.|
-|[ZOOKEEPER-55](https://issues.apache.org/jira/browse/ZOOKEEPER-55)|build.xml failes to retrieve a release number from SVN and the ant target "dist" fails|
-|[ZOOKEEPER-89](https://issues.apache.org/jira/browse/ZOOKEEPER-89)|invoke WhenOwnerListener.whenNotOwner when the ZK connection fails|
-|[ZOOKEEPER-90](https://issues.apache.org/jira/browse/ZOOKEEPER-90)|invoke WhenOwnerListener.whenNotOwner when the ZK session expires and the znode is the leader|
-|[ZOOKEEPER-82](https://issues.apache.org/jira/browse/ZOOKEEPER-82)|Make the ZooKeeperServer more DI friendly.|
-|[ZOOKEEPER-110](https://issues.apache.org/jira/browse/ZOOKEEPER-110)|Build script relies on svnant, which is not compatible with subversion 1.5 working copies|
-|[ZOOKEEPER-111](https://issues.apache.org/jira/browse/ZOOKEEPER-111)|Significant cleanup of existing tests.|
-|[ZOOKEEPER-122](https://issues.apache.org/jira/browse/ZOOKEEPER-122)|Fix NPE in jute's Utils.toCSVString.|
-|[ZOOKEEPER-123](https://issues.apache.org/jira/browse/ZOOKEEPER-123)|Fix the wrong class is specified for the logger.|
-|[ZOOKEEPER-2](https://issues.apache.org/jira/browse/ZOOKEEPER-2)|Fix synchronization issues in QuorumPeer and FastLeader election.|
-|[ZOOKEEPER-125](https://issues.apache.org/jira/browse/ZOOKEEPER-125)|Remove unwanted class declaration in FastLeaderElection.|
-|[ZOOKEEPER-61](https://issues.apache.org/jira/browse/ZOOKEEPER-61)|Address in client/server test cases.|
-|[ZOOKEEPER-75](https://issues.apache.org/jira/browse/ZOOKEEPER-75)|cleanup the library directory|
-|[ZOOKEEPER-109](https://issues.apache.org/jira/browse/ZOOKEEPER-109)|cleanup of NPE and Resource issue nits found by static analysis|
-|[ZOOKEEPER-76](https://issues.apache.org/jira/browse/ZOOKEEPER-76)|Commit 677109 removed the cobertura library, but not the build targets.|
-|[ZOOKEEPER-63](https://issues.apache.org/jira/browse/ZOOKEEPER-63)|Race condition in client close|
-|[ZOOKEEPER-70](https://issues.apache.org/jira/browse/ZOOKEEPER-70)|Add skeleton forrest doc structure for ZooKeeper|
-|[ZOOKEEPER-79](https://issues.apache.org/jira/browse/ZOOKEEPER-79)|Document jacob's leader election on the wiki recipes page|
-|[ZOOKEEPER-73](https://issues.apache.org/jira/browse/ZOOKEEPER-73)|Move ZK wiki from SourceForge to Apache|
-|[ZOOKEEPER-72](https://issues.apache.org/jira/browse/ZOOKEEPER-72)|Initial creation/setup of ZooKeeper ASF site.|
-|[ZOOKEEPER-71](https://issues.apache.org/jira/browse/ZOOKEEPER-71)|Determine what to do re ZooKeeper Changelog|
-|[ZOOKEEPER-68](https://issues.apache.org/jira/browse/ZOOKEEPER-68)|parseACLs in ZooKeeper.java fails to parse elements of ACL, should be lastIndexOf rather than IndexOf|
-|[ZOOKEEPER-130](https://issues.apache.org/jira/browse/ZOOKEEPER-130)|update build.xml to support apache release process.|
-|[ZOOKEEPER-131](https://issues.apache.org/jira/browse/ZOOKEEPER-131)|Fix Old leader election can elect a dead leader over and over again.|
-|[ZOOKEEPER-137](https://issues.apache.org/jira/browse/ZOOKEEPER-137)|client watcher objects can lose events|
-|[ZOOKEEPER-117](https://issues.apache.org/jira/browse/ZOOKEEPER-117)|threading issues in Leader election|
-|[ZOOKEEPER-128](https://issues.apache.org/jira/browse/ZOOKEEPER-128)|test coverage on async client operations needs to be improved|
-|[ZOOKEEPER-127](https://issues.apache.org/jira/browse/ZOOKEEPER-127)|Use of non-standard election ports in config breaks services|
-|[ZOOKEEPER-53](https://issues.apache.org/jira/browse/ZOOKEEPER-53)|tests failing on solaris.|
-|[ZOOKEEPER-172](https://issues.apache.org/jira/browse/ZOOKEEPER-172)|FLE Test|
-|[ZOOKEEPER-41](https://issues.apache.org/jira/browse/ZOOKEEPER-41)|Sample startup script|
-|[ZOOKEEPER-33](https://issues.apache.org/jira/browse/ZOOKEEPER-33)|Better ACL management|
-|[ZOOKEEPER-49](https://issues.apache.org/jira/browse/ZOOKEEPER-49)|SetACL does not work|
-|[ZOOKEEPER-20](https://issues.apache.org/jira/browse/ZOOKEEPER-20)|Child watches are not triggered when the node is deleted|
-|[ZOOKEEPER-15](https://issues.apache.org/jira/browse/ZOOKEEPER-15)|handle failure better in build.xml:test|
-|[ZOOKEEPER-11](https://issues.apache.org/jira/browse/ZOOKEEPER-11)|ArrayList is used instead of List|
-|[ZOOKEEPER-45](https://issues.apache.org/jira/browse/ZOOKEEPER-45)|Restructure the SVN repository after initial import |
-|[ZOOKEEPER-1](https://issues.apache.org/jira/browse/ZOOKEEPER-1)|Initial ZooKeeper code contribution from Yahoo!|


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