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<h1 id="title">Releases Archive</h1>
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<h1><a href="/release/2.6.0.html">Release 2.6.0 available</a></h1>
<p><small>2014 Nov 18 </small></p>
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you may not use this file except in compliance with the License.
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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
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<p>Apache Hadoop 2.6.0 contains a number of significant enhancements such
as:</p>
<ul>
<li>Hadoop Common</li>
<li><a href="https://issues.apache.org/jira/browse/HADOOP-10433">HADOOP-10433</a> -
Key management server (beta)</li>
<li><a href="https://issues.apache.org/jira/browse/HADOOP-10607">HADOOP-10607</a> -
Credential provider (beta)</li>
<li>Hadoop HDFS</li>
<li>Heterogeneous Storage Tiers - Phase 2</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-5682">HDFS-5682</a> -
Application APIs for heterogeneous storage</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-7228">HDFS-7228</a> -
SSD storage tier</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-5851">HDFS-5851</a> -
Memory as a storage tier (beta)</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-6584">HDFS-6584</a> -
Support for Archival Storage</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-6134">HDFS-6134</a> -
Transparent data at rest encryption (beta)</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-2856">HDFS-2856</a> -
Operating secure DataNode without requiring root access</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-6740">HDFS-6740</a> -
Hot swap drive: support add/remove data node volumes without
restarting data node (beta)</li>
<li><a href="https://issues.apache.org/jira/browse/HDFS-6606">HDFS-6606</a> -
AES support for faster wire encryption</li>
<li>Hadoop YARN</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-896">YARN-896</a> -
Support for long running services in YARN</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-913">YARN-913</a> -
Service Registry for applications</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-666">YARN-666</a> -
Support for rolling upgrades</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-556">YARN-556</a> -
Work-preserving restarts of ResourceManager</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-1336">YARN-1336</a> -
Container-preserving restart of NodeManager</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-796">YARN-796</a> -
Support node labels during scheduling</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-1051">YARN-1051</a> -
Support for time-based resource reservations in Capacity
Scheduler (beta)</li>
<li><a href="https://issues.apache.org/jira/browse/YARN-1964">YARN-1964</a> -
Support running of applications natively in Docker containers
(alpha)</li>
</ul>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.6.0 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.5.1.html">Release 2.5.1 available</a></h1>
<p><small>2014 Sep 12 </small></p>
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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
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-->
<p>Apache Hadoop 2.5.1 is a point release in the 2.5.x release line, and
fixes a few release issues with 2.5.0.</p>
<h1><a href="/release/2.5.0.html">Release 2.5.0 available</a></h1>
<p><small>2014 Aug 11 </small></p>
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.5.0 is a minor release in the 2.x release line.</p>
<p>The release includes the following major features and improvements:</p>
<ul>
<li>Authentication improvements when using an HTTP proxy server.</li>
<li>A new Hadoop Metrics sink that allows writing directly to Graphite.</li>
<li>Specification for Hadoop Compatible Filesystem effort.</li>
<li>Support for POSIX-style filesystem extended attributes.</li>
<li>OfflineImageViewer to browse an fsimage via the WebHDFS API.</li>
<li>Supportability improvements and bug fixes to the NFS gateway.</li>
<li>Modernized web UIs (HTML5 and Javascript) for HDFS daemons.</li>
<li>YARN&rsquo;s REST APIs support submitting and killing applications.</li>
<li>Kerberos integration for the YARN&rsquo;s timeline store.</li>
<li>FairScheduler allows creating user queues at runtime under any
specified parent queue.</li>
</ul>
<p>Users are encouraged to try out 2.5.0</p>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.5.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.5.0 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.4.1.html">Release 2.4.1 available</a></h1>
<p><small>2014 Jun 30 </small></p>
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Licensed 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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.4.1 is a bug-fix release for the stable 2.4.x line.</p>
<p>There is also a security bug fix in this minor release.</p>
<ul>
<li>CVE-2014-0229: Add privilege checks to HDFS admin sub-commands
refreshNamenodes, deleteBlockPool and shutdownDatanode.</li>
</ul>
<p>Users are encouraged to immediately move to 2.4.1.</p>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.4.1 Release
Notes</a>
for details.</p>
<h1><a href="/release/0.23.11.html">Release 0.23.11 available</a></h1>
<p><small>2014 Jun 27 </small></p>
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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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. See accompanying LICENSE file.
-->
<p>A point release for the 0.23.X line. Bug fixes to continue
stabilization.</p>
<p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.11/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.11 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.4.0.html">Release 2.4.0 available</a></h1>
<p><small>2014 Apr 7 </small></p>
<!---
Licensed 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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.4.0 contains a number of significant enhancements such
as:</p>
<ul>
<li>Support for Access Control Lists in HDFS</li>
<li>Native support for Rolling Upgrades in HDFS</li>
<li>Usage of protocol-buffers for HDFS FSImage for smooth operational
upgrades</li>
<li>Complete HTTPS support in HDFS</li>
<li>Support for Automatic Failover of the YARN ResourceManager</li>
<li>Enhanced support for new applications on YARN with Application
History Server and Application Timeline Server</li>
<li>Support for strong SLAs in YARN CapacityScheduler via Preemption</li>
</ul>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.4.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.4.0 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.3.0.html">Release 2.3.0 available</a></h1>
<p><small>2014 Feb 20 </small></p>
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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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.3.0 contains a number of significant enhancements such
as:</p>
<ul>
<li>Support for Heterogeneous Storage hierarchy in HDFS.</li>
<li>In-memory cache for HDFS data with centralized administration and
management.</li>
<li>Simplified distribution of MapReduce binaries via HDFS in YARN
Distributed Cache.</li>
</ul>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.3.0 Release
Notes</a>
for details.</p>
<h1><a href="/release/0.23.10.html">Release 0.23.10 available</a></h1>
<p><small>2013 Dec 11 </small></p>
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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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. See accompanying LICENSE file.
-->
<p>A point release for the 0.23.X line. Bug fixes to continue
stabilization.</p>
<p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.10/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.10 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.2.0.html">Release 2.2.0 available</a></h1>
<p><small>2013 Oct 15 </small></p>
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.2.0 is the <strong>GA</strong> release of Apache Hadoop 2.x.</p>
<p>Users are encouraged to immediately move to 2.2.0 since this release is
significantly more stable and is guaranteed to remain compatible in
terms of both APIs and protocols.</p>
<p>To recap, this release has a number of significant highlights compared
to Hadoop 1.x:</p>
<ul>
<li>YARN - A general purpose resource management system for Hadoop to
allow MapReduce and other other data processing frameworks and
services</li>
<li>High Availability for HDFS</li>
<li>HDFS Federation</li>
<li>HDFS Snapshots</li>
<li>NFSv3 access to data in HDFS</li>
<li>Support for running Hadoop on Microsoft Windows</li>
<li>Binary Compatibility for MapReduce applications built on hadoop-1.x</li>
<li>Substantial amount of integration testing with rest of projects in
the ecosystem</li>
</ul>
<p>A couple of important points to note while upgrading to hadoop-2.2.0:</p>
<ul>
<li>HDFS - The HDFS community decided to push the symlinks feature out
to a future 2.3.0 release and is currently disabled.</li>
<li>YARN/MapReduce - Users need to change ShuffleHandler service name
from mapreduce.shuffle to mapreduce_shuffle.</li>
</ul>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.2.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.2.0 Release
Notes</a>
for details.</p>
<h1><a href="/release/2.1.1-beta.html">Release 2.1.1-beta available</a></h1>
<p><small>2013 Sep 23 </small></p>
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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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. See accompanying LICENSE file.
-->
<p>Apache Hadoop 2.1.1-beta is a bug-fix version of the beta release of
Apache Hadoop 2.x.</p>
<p>Please see the <a href="https://hadoop.apache.org/docs/r2.1.1-beta/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.1.1-beta Release
Notes</a>
for details.</p>
</ul>
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