Title: BookKeeper Releases Notice: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at . http://www.apache.org/licenses/LICENSE-2.0 . Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. h1. Apache BookKeeper Releases * "Download":#download * "Release Notes":#releasenotes * "News":#news h2(#download). Download Releases may be downloaded from Apache mirrors: "Download":http://www.apache.org/dyn/closer.cgi/bookkeeper Older releases are available in the Apache archive: "Older Releases":http://archive.apache.org/dist/bookkeeper/ h2(#releasenotes). Release Notes Release notes for Apache BookKeeper releases are available in Jira: "Browse release notes":https://issues.apache.org/jira/browse/BOOKKEEPER?report=com.atlassian.jira.plugin.system.project:changelog-panel%3Aversions-panel h2(#news). News h3. 16 May, 2016: release 4.4.0 available This is the fourth release of BookKeeper as an Apache Top Level Project! This release contains a total of 94 Jira tickets fixed and brings several bookie reliability and operability improvements, along with a long list of bugfixes. See "BookKeeper 4.4.0 Release Notes":./docs/r4.4.0/releaseNotes.html for details. h3. 30 Nov, 2015: release 4.3.2 available This is the third release of BookKeeper as an Apache Top Level Project! This release fixes some issues in both bookie server and bookkeeper client. See "BookKeeper 4.3.2 Release Notes":./docs/r4.3.2/releaseNotes.html for details. h3. 27 May, 2015: release 4.3.1 available This is the second release of BookKeeper as an Apache Top Level Project! This release fixes some issues in both bookie server and bookkeeper client. See "BookKeeper 4.3.1 Release Notes":./docs/r4.3.1/releaseNotes.html for details. h3. 16 Jan, 2015: release 4.2.4 available This is the first release of BookKeeper as an Apache Top Level Project! This release fixes some critical issues in fencing when the ack quorum and write quorum are different sizes. See "BookKeeper 4.2.4 Release Notes":./docs/r4.2.4/releaseNotes.html for details. h3. 14 Oct, 2014: release 4.3.0 available This is the seventh release of BookKeeper as a subproject of Zookeeper. This release includes a lot of improvements to the bookie on-disk performance, a new statistics framework, and protobuffer protocol support along with numerous bugfixes. See "BookKeeper 4.3.0 Release Notes":./docs/r4.3.0/releaseNotes.html for details. h3. 27 June, 2013: release 4.2.3 available This is the sixth release of BookKeeper as a subproject of Zookeeper. This is a bugfix release for 4.2.2. Notable fixes and improvements include new utilities to give administrators better visibility of cluster state (BOOKKEEPER-746), improvements to allow for smoother rolling upgrades (BOOKKEEPER-745), fixes to ledger polling to ensure metadata updates aren't missed (BOOKKEEPER-710 & BOOKKEEPER-747) and shading of protobuf libraries to avoid conflicts when included with other version (BOOKKEEPER-708). See "BookKeeper 4.2.3 Release Notes":./docs/r4.2.3/releaseNotes.html for details. h3. 9 Oct, 2013: release 4.2.2 available This is the fifth release of BookKeeper as a subproject of Zookeeper. This is a bugfix release for 4.2.1. There are some minor API improvements. Notably, it is now possible to check whether a ledger is closed without opening it, and it is now possible to get a list of ledgers available in the cluster. See "BookKeeper 4.2.2 Release Notes":./docs/r4.2.2/releaseNotes.html for details. h3. 27 Feb, 2013: release 4.2.1 available This is the fourth release of BookKeeper as a subproject of Zookeeper. *This release fixes a major performance bug in release 4.2.0. All users of BookKeeper 4.2.0 should upgrade immediately.* See "BookKeeper 4.2.1 Release Notes":./docs/r4.2.1/releaseNotes.html for details. h3. 18 Jan, 2013: release 4.2.0 available This is the third release of BookKeeper as a subproject of Zookeeper. See "BookKeeper 4.2.0 Release Notes":./docs/r4.2.0/releaseNotes.html for details. h3. 12 Jun, 2012: release 4.1.0 available This is the second release of BookKeeper as a subproject of Zookeeper. See "BookKeeper 4.1.0 Release Notes":./docs/r4.1.0/releaseNotes.html for details. h3. 7 Dec, 2011: release 4.0.0 available This is the first release of BookKeeper as a subproject of Zookeeper. See "BookKeeper 4.0.0 Release Notes":./docs/r4.0.0/releaseNotes.html for details.