Yes, it is possible to trigger a Jenkins build via Jira issue using the Jira Trigger Plugin for Jenkins. The Jira Trigger Plugin for Jenkins allows you to configure Jira issues to trigger Jenkins builds automatically. You can specify the Jira issue key or a JQL query that will match multiple issues, and the plugin will monitor the specified Jira project(s) for changes to the issues that match the criteria. When a change occurs, such as a new comment or a status change, the plugin will trigger a Jenkins build, passing in the Jira issue details as build parameters. This allows you to automate your build process based on changes to Jira issues, ensuring that your software is always up to date with the latest changes. To set this up, you will need to install the Jira Trigger Plugin for Jenkins and configure it to monitor the desired Jira project(s) and issues. You can then configure your Jenkins job to receive the Jira issue details as build parameters and perform the desired actions based on the information provided.
