New and Noteworthy

This is the second release candiate release of 4.0.

This release of ActiveMQ includes a large number of new features such as MasterSlave and Message Groups together with numerous bug fixes.


When upgrading from a previous release you are advised to clear down the journal files and persistent database first before upgrading to this jar as the binary format of messages is not compatible with 3.x or earlier 4.x releases.

What has changed

The 4.x branch of ActiveMQ has now moved to the Apache Incubator so the package names have changed from org.activemq to org.apache.activemq. For a full list see the Changes in 4.0.

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Binary Distribution in zip package

Source Distribution in zip package


Binary Distribution in gz package


Source Distribution in gz package


For a more detailed view of new features and bug fixes, see the release notes

JIRA Issues Macro: Unable to locate JIRA server for this macro. It may be due to Application Link configuration.

Also see the previous ActiveMQ 4.0 M4 Release

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