Apache ZooKeeper™ release 3.4.5 is now available. This is a bug fix release including 3 bug fixes. Following is a summary of the critical issues fixed in the release.

ZOOKEEPER-1550: ZooKeeperSaslClient does not finish anonymous login on OpenJDK

ZOOKEEPER-1376: zkServer.sh does not correctly check for $SERVER_JVMFLAGS

ZOOKEEPER-1560: Zookeeper client hangs on creation of large nodes.

Stability of 3.4.5

Note that Apache ZooKeeper™ 3.4.5 is marked as the current stable release. This release fixes the disconnect issue (ZOOKEEPER-1550) that unfortunately got introduced in ZooKeeper™ 3.4.4 release.

Acknowledgements

Thanks to everyone who contributed towards the release including our users who reported the bugs in 3.4.5.

Learn More

You can learn more about Zookeeper™ on the Zookeeper™ Wiki, or in the documentation for Zookeeper™ 3.4.5.

Apache ZooKeeper release 3.4.4 is now available. This is a bug fix release including 50 bug fixes. Following is a summary of the critical issues fixed in the release.

ZOOKEEPER-1419 Leader Election never settles for a 5 node cluster

ZOOKEEPER-1489 Data loss after truncate on transaction log

ZOOKEEPER-1412 java client watches inconsistently triggered on reconnect

ZOOKEEPER-1344 ZooKeeper client multi-update command is not considering the
Chroot request

ZOOKEEPER-1496 Ephemeral node not getting cleared even after client has exited

ZOOKEEPER-1437 Client uses session before SASL authentication complete

Stability of 3.4.4

As you might have noticed we have been marking all the previous 3.4.* releases as Alpha and beta. After having a couple of releases out (3.4.0, 3.4.1, 3.4.2, 3.4.3), we in the ZooKeeper community have decided to upgrade 3.4.4 as a stable release.

Acknowledgements

Thanks to everyone who contributed towards the release including our users who reported the bugs in 3.4.4.

For those of you new to Apache ZooKeeper, it is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. To learn more about ZooKeeper, please visit the Apache ZooKeeper homepage.

As part of stabilizing Apache ZooKeeper 3.4 branch, ZooKeeper 3.4.3 has just been released. It is a bug fix release on the 3.4 branch and fixes 17 issues out of which 1 is very critical and can cause data inconsistency (ZOOKEEPER-1367). This particular issue can lead to data inconsistencies in your ZooKeeper servers. If you are currently using any of the 3.4.* releases, please make sure you upgrade to 3.4.3.

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