Schedule failing to start in Qlik Cloud

[Paulo_IntelFab]

Hi, there. 

From today around 4AM the scheduling service for my tenant stop working in all kind of tasks (loads, reports and subscriptions), as can be seen in the image. 

How can: 
- Understand the cause of this problem?
- Restart the scheduling so they work normally?
- Avoid this problem happen again?

[Greg_Taffer · Accepted solution]

Based on the behavior described, the Qlik Cloud scheduling service has likely encountered a backend error, a capacity limit, or a task dependency failure that stopped the scheduling engine. In Qlik Cloud (SaaS), you cannot restart services directly like on-premise, but you can resolve this through task management and monitoring. 
 

1. Understand the Cause of the Problem
 

• Check Qlik Cloud Status: The first step is to check if there is an incident affecting your tenant region. Go to status.qlikcloud.com to review any ongoing incidents or maintenance that began around 4 AM.
• Review Task Details (Reload History):
  • Navigate to the Analytics activity center > Tasks (or app details > reload history).
  • Click the three ellipses > Details > Reload History on a failed task to see the error message.
• Check for 5 Consecutive Failures: Tasks set to reload automatically can be deactivated if they fail 5 consecutive times. Check if your tasks have been automatically set to inactive.
• Check for Task Dependency Failures: If your tasks are chained (e.g., Task B starts after Task A succeeds), a failure in the initial task will stop all downstream scheduling. 

2. Restart/Restore Scheduling
 

• Run Tasks Manually: In the Tasks section, select a task and click Run now to test if the engine is responding.
• Re-activate Tasks: If tasks were deactivated due to consecutive failures, you will need to manually re-activate them.
• Check for "Stuck" Tasks: If tasks are stuck in a "Triggered" state, you may need to use the task menu to stop them and then restart them.
• Remove & Recreate Tasks: If a specific task is corrupted, deleting it and recreating it can sometimes resolve the issue. 

3. Avoid This Problem in the Future
 

• Set Up Notifications: Configure alert notifications to be sent when tasks fail, allowing you to address issues before they cause 5 failures and deactivate.
• Review Scheduled Times: If tasks fail due to capacity limits at 4 AM, consider staggering your reloads to reduce the load on the scheduling engine at a single peak time.
• Monitor Task Ownership: If tasks were created by a user who has left the organization or had their access revoked, the tasks will fail. Ensure tasks are owned by a service account or an active admin.
• Utilize Qlik Cloud APIs: For more advanced monitoring, set up a Task Monitor application using Qlik Cloud APIs to keep track of failures in real-time.

[marksouzacosta]

FYI We found the same problem in the same day and time.

Regards,

Mark Costa

[Paulo_IntelFab]

I've run through the steps to recover the scheduling of all tasks (run manually and deactivate/activate the schedulled tasks). And it worked well.