Skip to main content

         This documentation site is for previous versions. Visit our new documentation site for current releases.      

This content has been archived and is no longer being updated.

Links may not function; however, this content may be relevant to outdated versions of the product.

Tumbling time windows not emitting events

Updated on March 11, 2021

During processing of an event strategy, the Window shape does not emit events even though the period of time for keeping events has expired.


This condition occurs when the Real-Time Data shape in the event strategy is configured to use the event time as the time provider instead of the system time. In this case, the Window shape does not emit shapes automatically after the time period for keeping events has expired. Instead, the Window shape emits events only when new events arrive. For example, if the Window shape is scheduled to emit events at 12:30:00, it does so only when an event with its time property equal to 12:30:00 or later arrives at that shape.

To eliminate this condition, configure the Real-Time Data shape in the event strategy to use the system time as the time provider for events.


  1. In the navigation pane of Dev Studio, click Records.
  2. Expand the Decision category, and then click Event Strategy.
  3. Select an event strategy rule to edit.
  4. Double-click the Real-Time Data shape to view its properties.
  5. In the Event-timestamp section, select the System time check box.
  6. Click Submit.
  7. Save the rule.

Have a question? Get answers now.

Visit the Support Center to ask questions, engage in discussions, share ideas, and help others.

Did you find this content helpful?

Want to help us improve this content?

We'd prefer it if you saw us at our best. is not optimized for Internet Explorer. For the optimal experience, please use:

Close Deprecation Notice
Contact us