Task types are described in Chapter 36, Tasks.

    In the Cluster environment, all tasks have an additional attribute Node IDs to process the task. If there is no node ID specified, the task may be processed on any Cluster node. In most cases, it will be processed on the same node where the event was triggered. If there are some nodeIDs specified, the task will be processed on the first node in the list which is connected in Cluster and ready.

    Send an Email
    Execute Shell Command
    Start a Graph
    Start a Jobflow
    Start a Profiler Job
    Abort job
    Archive Records
    Send a JMS Message
    Execute Groovy Code