Gateway Hub - java.lang.OutOfMemoryError: Java heap space

If the maximum space available consumed by the application has reach the maximum configured in the java settings, out of memory error message gets presented.

Example error:

Uncaught error from thread [default-scheduler-1]: Java heap space, shutting down JVM since ’test.jvm-exit-on-fatal-error’ is enabled for ActorSystem[default] java.lang.OutOfMemoryError: Java heap space

Solution: When encountering this type of error, it is best to increase the heap size to reduce memory issues:

You need to look into your gateway-hub config file (the one you use for hubctl start/stop ) and adjust the following:

    # Memory limit in MB.
    # Required: False
    # Default: 64
    memory_limit: 64

NOTE: If the Gateway Hub orchestration service has been registered with systemd, it is better to mask the orchestration service when upgrading the operating system on each node. For more information, see Registration with systemd.