3.3.7 View Task Queues

Use the Task Queues page to monitor worker-polled task queues, such as simple tasks or worker tasks. This page helps you check whether workers are polling for a selected task and whether any task executions are waiting in the queue.

A task queue is created for a task type when task executions are scheduled and must be picked up by workers. Workers poll the queue for a task type, execute the task, and update the task result. If tasks are added faster than workers can poll and complete them, the queue size increases.

You can use this page to:

• Verify whether workers are actively polling a task queue.
• Identify the last worker that polled for a task.
• Check whether pending task executions are accumulating.
• Compare queue backlog across domains, when domains are used.
• Troubleshoot worker availability or capacity issues when queue size remains high or last poll time is stale.

For example, if the queue size for a task is increasing and the last poll time is old, workers may not be running, may not be polling the correct task name or domain, or may not have enough capacity to process the queued work.

To view task queue details:

1. Open the navigation menu and click Task Queues.
2. In the Select a Task Name drop-down list, select the task whose queue details you want to view. The drop-down list displays task definition names.

   The following details are displayed for the selected task.

   • Domain: The domain in which workers poll for the selected task. If no domain is configured, (Domain not set) is displayed.
   • Last Polled Worker: The worker ID of the most recent worker that polled this task queue for the displayed domain. This is not the task name. It is the worker identifier sent by the worker while polling.
   • Last Poll Time: The time when the task queue was last polled by a worker for the displayed domain. The time is displayed in the browser's local time zone in the yyyy-MM-dd HH:mm:ss format, followed by a relative time value. For example, 2026-11-30 17:40:00 (less than a minute ago).
   • Queue Size: The number of task executions currently waiting in the queue for the selected task and domain. A value of 0 means there are no pending executions waiting to be polled for that task queue.