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             <h1><a href="/release/2.0.3-alpha.html">Release 2.0.3-alpha available</a></h1>
             <p><small>2013 Feb 14 </small></p>

             <!---
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   you may not use this file except in compliance with the License.
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 -->
 <p>This is the latest (alpha) version in the hadoop-2.x series.</p>
 <p>This release delivers significant major features and stability over
 previous releases in hadoop-2.x series:</p>
 <ul>
 <li>QJM for HDFS HA for NameNode</li>
 <li>Multi-resource scheduling (CPU and memory) for YARN</li>
 <li>YARN ResourceManager Restart</li>
 <li>Significant stability at scale for YARN (over 30,000 nodes and 14
 million applications so far, at time of release)</li>
 </ul>
 <p>This release, like previous releases in hadoop-2.x series is still
 considered <em>alpha</em> primarily since some of APIs aren&rsquo;t fully-baked and
 we expect some churn in future. Furthermore, please note that there are
 some API changes from previous hadoop-2.0.2-alpha release and
 applications will need to recompile against hadoop-2.0.3-alpha.</p>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.3-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.3-alpha Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/0.23.6.html">Release 0.23.6 available</a></h1>
             <p><small>2013 Feb 7 </small></p>

             <!---
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 <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/r0.23.6/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.6 Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/1.1.1.html">Release 1.1.1 available</a></h1>
             <p><small>2012 Dec 1 </small></p>

             <!---
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 <p>Point release for the 1.1.X line. Bug fixes and improvements, as
 documented in the <a href="https://hadoop.apache.org/docs/r1.1.1/releasenotes.html">Hadoop 1.1.1 Release
 Notes</a>.</p>


             <h1><a href="/release/0.23.5.html">Release 0.23.5 available</a></h1>
             <p><small>2012 Nov 28 </small></p>

             <!---
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 <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/r0.23.5/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.5 Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/0.23.4.html">Release 0.23.4 available</a></h1>
             <p><small>2012 Oct 15 </small></p>

             <!---
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   you may not use this file except in compliance with the License.
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   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. Most notably this release now
 incluses support for upgrading a 1.X HDFS cluster with append/synch
 enabled.</p>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.4/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.4 Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/1.1.0.html">Release 1.1.0 available</a></h1>
             <p><small>2012 Oct 13 </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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   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>This is a beta release for version 1.1.</p>
 <p>This release has approximately 135 enhancements and bug fixes compared
 to Hadoop-1.0.4, including:</p>
 <ul>
 <li>Many performance improvements in HDFS, backported from trunk</li>
 <li>Improvements in Security to use SPNEGO instead of Kerberized SSL for
 HTTP transactions</li>
 <li>Lower default minimum heartbeat for task trackers from 3 sec to
 300msec to increase job throughput on small clusters</li>
 <li>Port of Gridmix v3</li>
 <li>Set MALLOC_ARENA_MAX in hadoop-config.sh to resolve problems with
 glibc in RHEL-6</li>
 <li>Splittable bzip2 files</li>
 <li>Of course it also has the same security fix as release 1.0.4.</li>
 </ul>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r1.1.0/releasenotes.html">Hadoop 1.1.0 Release
 Notes</a> for
 details.</p>


             <h1><a href="/release/1.0.4.html">Release 1.0.4 available</a></h1>
             <p><small>2012 Oct 12 </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

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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
   limitations under the License. See accompanying LICENSE file.
 -->
 <p>This is a Security Patch release for version 1.0.</p>
 <p>There are four bug fixes and feature enhancements in this minor release:</p>
 <ul>
 <li>Security issue CVE-2012-4449: Hadoop tokens use a 20-bit secret</li>
 <li>HADOOP-7154 - set MALLOC_ARENA_MAX in hadoop-config.sh to resolve
 problems with glibc in RHEL-6</li>
 <li>HDFS-3652 - FSEditLog failure removes the wrong edit stream when
 storage dirs have same name</li>
 <li>MAPREDUCE-4399 - Fix (up to 3x) performance regression in shuffle</li>
 </ul>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r1.0.4/releasenotes.html">Hadoop 1.0.4 Release
 Notes</a> for
 details.</p>


             <h1><a href="/release/2.0.2-alpha.html">Release 2.0.2-alpha available</a></h1>
             <p><small>2012 Oct 9 </small></p>

             <!---
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   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>This is the second (alpha) version in the hadoop-2.x series.</p>
 <p>This delivers significant enhancements to HDFS HA. Also it has a
 significantly more stable version of YARN which, at the time of release,
 has already been deployed on a 2000 node cluster.</p>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.2-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.2-alpha Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/0.23.3.html">Release 0.23.3 available</a></h1>
             <p><small>2012 Sep 17 </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>This release contains YARN and MRv2 but does not have Name Node High
 Avalability</p>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.3/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.3 Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/2.0.1-alpha.html">Release 2.0.1-alpha available</a></h1>
             <p><small>2012 Jul 26 </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>This release contains important security fixes over hadoop-2.0.0-alpha.</p>
 <p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.1-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.1-alpha Release
 Notes</a>
 for details.</p>


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	<h1><a href="/release/2.0.3-alpha.html">Release 2.0.3-alpha available</a></h1>
	<p><small>2013 Feb 14 </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>This is the latest (alpha) version in the hadoop-2.x series.</p>
	<p>This release delivers significant major features and stability over
	previous releases in hadoop-2.x series:</p>
	<ul>
	<li>QJM for HDFS HA for NameNode</li>
	<li>Multi-resource scheduling (CPU and memory) for YARN</li>
	<li>YARN ResourceManager Restart</li>
	<li>Significant stability at scale for YARN (over 30,000 nodes and 14
	million applications so far, at time of release)</li>
	</ul>
	<p>This release, like previous releases in hadoop-2.x series is still
	considered <em>alpha</em> primarily since some of APIs aren’t fully-baked and
	we expect some churn in future. Furthermore, please note that there are
	some API changes from previous hadoop-2.0.2-alpha release and
	applications will need to recompile against hadoop-2.0.3-alpha.</p>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.3-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.3-alpha Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/0.23.6.html">Release 0.23.6 available</a></h1>
	<p><small>2013 Feb 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>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/r0.23.6/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.6 Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/1.1.1.html">Release 1.1.1 available</a></h1>
	<p><small>2012 Dec 1 </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>Point release for the 1.1.X line. Bug fixes and improvements, as
	documented in the <a href="https://hadoop.apache.org/docs/r1.1.1/releasenotes.html">Hadoop 1.1.1 Release
	Notes</a>.</p>



	<h1><a href="/release/0.23.5.html">Release 0.23.5 available</a></h1>
	<p><small>2012 Nov 28 </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>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/r0.23.5/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.5 Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/0.23.4.html">Release 0.23.4 available</a></h1>
	<p><small>2012 Oct 15 </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>A point release for the 0.23.X line. Most notably this release now
	incluses support for upgrading a 1.X HDFS cluster with append/synch
	enabled.</p>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.4/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.4 Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/1.1.0.html">Release 1.1.0 available</a></h1>
	<p><small>2012 Oct 13 </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>This is a beta release for version 1.1.</p>
	<p>This release has approximately 135 enhancements and bug fixes compared
	to Hadoop-1.0.4, including:</p>
	<ul>
	<li>Many performance improvements in HDFS, backported from trunk</li>
	<li>Improvements in Security to use SPNEGO instead of Kerberized SSL for
	HTTP transactions</li>
	<li>Lower default minimum heartbeat for task trackers from 3 sec to
	300msec to increase job throughput on small clusters</li>
	<li>Port of Gridmix v3</li>
	<li>Set MALLOC_ARENA_MAX in hadoop-config.sh to resolve problems with
	glibc in RHEL-6</li>
	<li>Splittable bzip2 files</li>
	<li>Of course it also has the same security fix as release 1.0.4.</li>
	</ul>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r1.1.0/releasenotes.html">Hadoop 1.1.0 Release
	Notes</a> for
	details.</p>



	<h1><a href="/release/1.0.4.html">Release 1.0.4 available</a></h1>
	<p><small>2012 Oct 12 </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>This is a Security Patch release for version 1.0.</p>
	<p>There are four bug fixes and feature enhancements in this minor release:</p>
	<ul>
	<li>Security issue CVE-2012-4449: Hadoop tokens use a 20-bit secret</li>
	<li>HADOOP-7154 - set MALLOC_ARENA_MAX in hadoop-config.sh to resolve
	problems with glibc in RHEL-6</li>
	<li>HDFS-3652 - FSEditLog failure removes the wrong edit stream when
	storage dirs have same name</li>
	<li>MAPREDUCE-4399 - Fix (up to 3x) performance regression in shuffle</li>
	</ul>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r1.0.4/releasenotes.html">Hadoop 1.0.4 Release
	Notes</a> for
	details.</p>



	<h1><a href="/release/2.0.2-alpha.html">Release 2.0.2-alpha available</a></h1>
	<p><small>2012 Oct 9 </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>This is the second (alpha) version in the hadoop-2.x series.</p>
	<p>This delivers significant enhancements to HDFS HA. Also it has a
	significantly more stable version of YARN which, at the time of release,
	has already been deployed on a 2000 node cluster.</p>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.2-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.2-alpha Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/0.23.3.html">Release 0.23.3 available</a></h1>
	<p><small>2012 Sep 17 </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>This release contains YARN and MRv2 but does not have Name Node High
	Avalability</p>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r0.23.3/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.3 Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/2.0.1-alpha.html">Release 2.0.1-alpha available</a></h1>
	<p><small>2012 Jul 26 </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>This release contains important security fixes over hadoop-2.0.0-alpha.</p>
	<p>Please see the <a href="https://hadoop.apache.org/docs/r2.0.1-alpha/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 2.0.1-alpha Release
	Notes</a>
	for details.</p>



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