dolphinscheduler/docs/docs/en/guide/task/pigeon.md

Pigeon

Overview

Pigeon is a task used to trigger remote tasks, acquire logs or status by calling remote WebSocket service. It is DolphinScheduler uses a remote WebSocket service to call tasks.

Create Task

• Click Project Management -> Project Name -> Workflow Definition, and click the Create Workflow button to enter the DAG editing page.
• Drag from the toolbar to the canvas to create a new Pigeon task.

Task Parameters

Parameter	Description
Node Name	Set the name of the task. Node names within a workflow definition are unique.
Run flag	Indicates whether the node can be scheduled normally. If it is not necessary to execute, you can turn on the prohibiting execution switch.
Description	Describes the function of this node.
Task priority	When the number of worker threads is insufficient, they are executed in order from high to low according to the priority, and they are executed according to the first-in, first-out principle when the priority is the same.
Worker group	The task is assigned to the machines in the worker group for execution. If Default is selected, a worker machine will be randomly selected for execution.
Task group name	The group in Resources, if not configured, it will not be used.
Environment Name	Configure the environment in which to run the script.
Number of failed retries	The number of times the task is resubmitted after failure. It supports drop-down and manual filling.
Failure Retry Interval	The time interval for resubmitting the task if the task fails. It supports drop-down and manual filling.
Timeout alarm	Check Timeout Alarm and Timeout Failure. When the task exceeds the "timeout duration", an alarm email will be sent and the task execution will fail.
Target task name	Target task name of this Pigeon node.
Predecessor task	Selecting the predecessor task of the current task will set the selected predecessor task as the upstream of the current task.