Hazelcast is a real-time stream processing used internally by Germain.


Hazelcast 5.2.1-slim or later is supported.

Download Hazelcast


  • Extract archive to a directory of your choice

    • In this example we will use /opt/hazelcast

Start Hazelcast

  • This startup method is sufficient for a dev or test environment. For a production environment, we recommend running Hazelcast instances as a service.

  • Run Zookeeper via the shell (on Linux):

    • /opt/hazelcast/bin/hz-start

  • Run Zookeeper via command (on Windows):

    • C:\hazelcast\bin\hz-start.bat

Run Zookeeper as a service on Windows

  • Copy HazelcastService.exe and HazelcastService.xml from {serviceDistroDirectory}\install\hazelcast\ to your Hazelcast bin directory.

  • From an administrative command line, run:

    • HazelcastService.exe install

  • Start the Hazelcast Window Service using your preferred method