Automation to close all child tickets when the parent is closed

[MJ Flott]

I need to set up an automation to close all child tickets when a parent ticket is closed, This is standard functionality in other service management tools, so that one response can be sent out to all customers who report an issue. I cannot establish how to do this with automation, nor how to pull up only the children of any specific ticket via JQL. 

[Akhand Pratap Singh]

Hello @MJ Flott ,

If you have child parent relationship, you can use below Automation Rule.

[Jim Knepley - ReleaseTEAM]

Welcome to the community, @MJ Flott 

To take your question in reverse order, finding "children" depends on what you mean, but I think you'll be able to use the "parent" JQL field in your query.

https://support.atlassian.com/jira-service-management-cloud/docs/jql-fields/#Parent

If you implemented the parent/child relationship with issue links, that's the linkedIssuesOf() function.

Once you have the list of issues, the automation is straightforward. Trigger on a state transition to a closed state, search for children of the triggering ticket, and transition each child ticket to a closed state.