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             <h1><a href="/release/0.23.0.html">release 0.23.0 available</a></h1>
             <p><small>2011 Nov 11 </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 the alpha version of the hadoop-0.23 major release. This is the
 first release we&rsquo;ve made off Apache Hadoop trunk in a long while. This
 release is alpha-quality and not yet ready for serious use.</p>
 <p>hadoop-0.23 contains several major advances:</p>
 <ul>
 <li>HDFS Federation</li>
 <li>NextGen MapReduce (YARN)</li>
 </ul>
 <p>It also has several major performance improvements to both HDFS and
 MapReduce.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.23.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.0 Release
 Notes</a>
 for details.</p>


             <h1><a href="/release/0.20.205.0.html">release 0.20.205.0 available</a></h1>
             <p><small>2011 Oct 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

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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 release contains improvements, new features, bug fixes and
 optimizations. This release includes rpms and debs, all duly checksummed
 and securely signed.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.205.0/releasenotes.html">Hadoop 0.20.205.0 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.205.0/changes.html">change log for
 this release</a>.</p>
 <p>Notes:</p>
 <ul>
 <li>This release includes a merge of append/hsynch/hflush capabilities
 from 0.20-append branch, to support HBase in secure mode.</li>
 <li>This release includes the new webhdfs file system, but webhdfs write
 calls currently fail in secure mode.</li>
 </ul>


             <h1><a href="/release/0.20.204.0.html">release 0.20.204.0 available</a></h1>
             <p><small>2011 Sep 5 </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 improvements, new features, bug fixes and
 optimizations. This release includes rpms and debs for the first time.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.204.0/releasenotes.html">Hadoop 0.20.204.0 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.204.0/changes.html">change log for
 this release</a>.</p>
 <p>Notes:</p>
 <ul>
 <li>The RPMs don&rsquo;t work with security turned on. (HADOOP-7599)</li>
 <li>The NameNode&rsquo;s edit log needs to be merged into the image via</li>
 <li>put the NameNode into safe mode</li>
 <li>run dfsadmin savenamespace command</li>
 <li>perform a normal upgrade</li>
 </ul>


             <h1><a href="/release/0.20.203.0.html">release 0.20.203.0 available</a></h1>
             <p><small>2011 May 11 </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 many improvements, new features, bug fixes and
 optimizations. It is stable and has been deployed in large (4,500
 machine) production clusters.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.203.0/releasenotes.html">Hadoop 0.20.203.0 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.203.0/changes.html">change log for
 this release</a> or
 the <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.21.0.html">release 0.21.0 available</a></h1>
             <p><small>2010 Aug 23 </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 many improvements, new features, bug fixes and
 optimizations. It has not undergone testing at scale and should not be
 considered stable or suitable for production. This release is being
 classified as a minor release, which means that it should be API
 compatible with 0.20.2.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.21.0/releasenotes.html">Hadoop 0.21.0 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.21.0/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.20.2.html">release 0.20.2 available</a></h1>
             <p><small>2010 Feb 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 several critical bug fixes.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.2/releasenotes.html">Hadoop 0.20.2 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.2/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.20.1.html">release 0.20.1 available</a></h1>
             <p><small>2009 Sep 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 release contains several critical bug fixes.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.1/releasenotes.html">Hadoop 0.20.1 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.1/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.19.2.html">release 0.19.2 available</a></h1>
             <p><small>2009 Jul 23 </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 several critical bug fixes.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.19.2/releasenotes.html">Hadoop 0.19.2 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.19.2/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.20.0.html">release 0.20.0 available</a></h1>
             <p><small>2009 Apr 22 </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 many improvements, new features, bug fixes and
 optimizations.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.20.0/releasenotes.html">Hadoop 0.20.0 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.0/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


             <h1><a href="/release/0.19.1.html">release 0.19.1 available</a></h1>
             <p><small>2009 Feb 24 </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 many critical bug fixes, including <strong>some data
 loss issues</strong>. The release also introduces an <strong>incompatible change</strong> by
 disabling the file append API
 (<a href="http://issues.apache.org/jira/browse/HADOOP-5224">HADOOP-5224</a>) until
 it can be stabilized.</p>
 <p>See the <a href="https://hadoop.apache.org/docs/r0.19.1/releasenotes.html">Hadoop 0.19.1 Release
 Notes</a> for
 details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.19.1/changes.html">change log for
 this release</a> or the
 <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
 releases</a>.</p>


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	<h1 id="title">Releases Archive</h1>
	<ul id="list">

	<h1><a href="/release/0.23.0.html">release 0.23.0 available</a></h1>
	<p><small>2011 Nov 11 </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 alpha version of the hadoop-0.23 major release. This is the
	first release we’ve made off Apache Hadoop trunk in a long while. This
	release is alpha-quality and not yet ready for serious use.</p>
	<p>hadoop-0.23 contains several major advances:</p>
	<ul>
	<li>HDFS Federation</li>
	<li>NextGen MapReduce (YARN)</li>
	</ul>
	<p>It also has several major performance improvements to both HDFS and
	MapReduce.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.23.0/hadoop-project-dist/hadoop-common/releasenotes.html">Hadoop 0.23.0 Release
	Notes</a>
	for details.</p>



	<h1><a href="/release/0.20.205.0.html">release 0.20.205.0 available</a></h1>
	<p><small>2011 Oct 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 improvements, new features, bug fixes and
	optimizations. This release includes rpms and debs, all duly checksummed
	and securely signed.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.205.0/releasenotes.html">Hadoop 0.20.205.0 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.205.0/changes.html">change log for
	this release</a>.</p>
	<p>Notes:</p>
	<ul>
	<li>This release includes a merge of append/hsynch/hflush capabilities
	from 0.20-append branch, to support HBase in secure mode.</li>
	<li>This release includes the new webhdfs file system, but webhdfs write
	calls currently fail in secure mode.</li>
	</ul>



	<h1><a href="/release/0.20.204.0.html">release 0.20.204.0 available</a></h1>
	<p><small>2011 Sep 5 </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 improvements, new features, bug fixes and
	optimizations. This release includes rpms and debs for the first time.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.204.0/releasenotes.html">Hadoop 0.20.204.0 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.204.0/changes.html">change log for
	this release</a>.</p>
	<p>Notes:</p>
	<ul>
	<li>The RPMs don’t work with security turned on. (HADOOP-7599)</li>
	<li>The NameNode’s edit log needs to be merged into the image via</li>
	<li>put the NameNode into safe mode</li>
	<li>run dfsadmin savenamespace command</li>
	<li>perform a normal upgrade</li>
	</ul>



	<h1><a href="/release/0.20.203.0.html">release 0.20.203.0 available</a></h1>
	<p><small>2011 May 11 </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 many improvements, new features, bug fixes and
	optimizations. It is stable and has been deployed in large (4,500
	machine) production clusters.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.203.0/releasenotes.html">Hadoop 0.20.203.0 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.203.0/changes.html">change log for
	this release</a> or
	the <a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.21.0.html">release 0.21.0 available</a></h1>
	<p><small>2010 Aug 23 </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 many improvements, new features, bug fixes and
	optimizations. It has not undergone testing at scale and should not be
	considered stable or suitable for production. This release is being
	classified as a minor release, which means that it should be API
	compatible with 0.20.2.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.21.0/releasenotes.html">Hadoop 0.21.0 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.21.0/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.20.2.html">release 0.20.2 available</a></h1>
	<p><small>2010 Feb 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 several critical bug fixes.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.2/releasenotes.html">Hadoop 0.20.2 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.2/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.20.1.html">release 0.20.1 available</a></h1>
	<p><small>2009 Sep 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 release contains several critical bug fixes.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.1/releasenotes.html">Hadoop 0.20.1 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.1/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.19.2.html">release 0.19.2 available</a></h1>
	<p><small>2009 Jul 23 </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 several critical bug fixes.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.19.2/releasenotes.html">Hadoop 0.19.2 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.19.2/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.20.0.html">release 0.20.0 available</a></h1>
	<p><small>2009 Apr 22 </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 many improvements, new features, bug fixes and
	optimizations.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.20.0/releasenotes.html">Hadoop 0.20.0 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.20.0/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



	<h1><a href="/release/0.19.1.html">release 0.19.1 available</a></h1>
	<p><small>2009 Feb 24 </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 many critical bug fixes, including <strong>some data
	loss issues</strong>. The release also introduces an <strong>incompatible change</strong> by
	disabling the file append API
	(<a href="http://issues.apache.org/jira/browse/HADOOP-5224">HADOOP-5224</a>) until
	it can be stabilized.</p>
	<p>See the <a href="https://hadoop.apache.org/docs/r0.19.1/releasenotes.html">Hadoop 0.19.1 Release
	Notes</a> for
	details. Alternatively, you can look at the complete <a href="https://hadoop.apache.org/docs/r0.19.1/changes.html">change log for
	this release</a> or the
	<a href="http://issues.apache.org/jira/browse/HADOOP?report=com.atlassian.jira.plugin.system.project:changelog-panel">Jira issue log for all
	releases</a>.</p>



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