ActiveMQ Classic 6.2.1 Release

Apache ActiveMQ Classic 6.2.1 was released on Feb 18th, 2026.

This is a new milestone for the project, starting the 6.2.x series. This release especially includes:

• running Docker container with non root user
• fix on environment variables propagation in the Docker container
• additional validation on MQTT control packets
• fix incorrect QueueSize if Non-Persistent messages with TTL is used
• fix KahaDBStore ackAndPreparedMap is not properly cleared when recovered acks are removed
• fix ManagementContext unregister race condition
• a lot of dependencies updates

You can find details on the release notes.

Getting the Binary Distributions

Java compatibility: 17+

Verify the Integrity of Downloads

It is essential that you verify the integrity of the downloaded files using the ASC signature or SHA checksum.

The ASC signatures can be verified using PGP or GPG. Begin by following these steps:

1. Download the KEYS file.
2. Download the .asc signature for the relevant distribution file.
3. Verify the signature.
   • If using GPG:

      $ gpg --import KEYS
      $ gpg --verify <file-name>.asc <file-name>
     

   • If using PGP:

      $ pgp -ka KEYS
      $ pgp <file-name>.asc
     

Alternatively you can [also] verify the SHA-512 checksum of the file. For example, using the sha512sum command:

$ sha512sum -c <file-name>.sha512

Getting the Binaries using Maven 3

To use this release in your maven project, the simplest dependency that you can use in your Maven POM is:

<dependency>
  <groupId>org.apache.activemq</groupId>
  <artifactId>activemq-all</artifactId>
  <version>6.2.1</version>
</dependency>

If you need more fine grained control of your dependencies (activemq-all is an uber jar) pick and choose from the various components activemq-client, activemq-broker, activemq-xx-store etc.

Getting the Source Code

Source Distributions

Change Log

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

Also see the previous ActiveMQ Classic 6.2.0 Release