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<h2 id="ActiveMQ4.0M4Release-NewandNoteworthy">New and Noteworthy</h2>

<p>This is the first milestone release of 4.x since the move to Apache so the package names have changed from org.activemq to org.apache.activemq. For a full list see the <a shape="rect" href="changes-in-40.html">Changes in 4.0</a>.</p>

<p>This release of ActiveMQ includes a large number of <a shape="rect" href="changes-in-40.html">new features</a> such as <a shape="rect" href="masterslave.html">MasterSlave</a> and <a shape="rect" href="message-groups.html">Message Groups</a> together with numerous bug fixes.</p>

<h2 id="ActiveMQ4.0M4Release-DownloadHere">Download Here</h2>
<div class="table-wrap"><table class="confluenceTable"><tbody><tr><th colspan="1" rowspan="1" class="confluenceTh"><p>Download</p></th><th colspan="1" rowspan="1" class="confluenceTh"><p>Description</p></th></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p><a shape="rect" class="external-link" href="http://cvs.apache.org/repository/incubator-activemq/distributions/activemq-4.0-M4.zip">activemq-4.0-M4.zip</a></p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Binary Distribution in zip package</p></td></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p><a shape="rect" class="external-link" href="http://cvs.apache.org/repository/incubator-activemq/distributions/activemq-4.0-M4-src.zip">activemq-4.0-M4-src.zip</a></p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Source Distribution in zip package</p></td></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p><a shape="rect" class="external-link" href="http://cvs.apache.org/repository/incubator-activemq/distributions/activemq-4.0-M4.tar.gz">activemq-4.0-M4.tar.gz</a></p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Binary Distribution in gz package</p></td></tr><tr><td colspan="1" rowspan="1" class="confluenceTd"><p><a shape="rect" class="external-link" href="http://cvs.apache.org/repository/incubator-activemq/distributions/activemq-4.0-M4-src.tar.gz">activemq-4.0-M4-src.tar.gz</a></p></td><td colspan="1" rowspan="1" class="confluenceTd"><p>Source Distribution in gz package</p></td></tr></tbody></table></div>


<h2 id="ActiveMQ4.0M4Release-Changelog">Changelog</h2>
<p>For a more detailed view of new features and bug fixes, see the <a shape="rect" class="external-link" href="http://jira.activemq.org/jira/secure/ReleaseNote.jspa?projectId=10520&amp;styleName=Html&amp;version=11726" rel="nofollow">release notes</a></p>

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