Can't terminate sync outside of sync window

[hanikesn]

Describe the bug

Can't terminate outstanding sync outside of sync window.

To Reproduce

1. Configure a sync window for an application and enable auto sync
2. Apply an update to the Application using kubectl with the following options:

   apiVersion: argoproj.io/v1alpha1
   kind: Application
   metadata:
     # ...
   operation: null
   spec:
     # ...
     source:
       # ...
     syncPolicy:
       automated:
         allowEmpty: false
         prune: true
         selfHeal: true
       syncOptions:
         - ApplyOutOfSyncOnly=true
         - FailOnSharedResource=true
         - PruneLast=true
         - RespectIgnoreDifferences=true

3. The sync will get started, but is blocked Sync operation blocked by sync window
4. Try terminating the sync in the web interface

Expected behavior

Even outside a sync window I'm able to terminate an outstanding sync.

Screenshots

Version

v2.12.6+4dab5bd

[andrii-korotkov-verkada]

I've checked the code and it seems like TerminateOperation has a separate path from checking a sync window. I think Sync operation blocked by sync window refers to the sync attempt, not the termination attempt. Can you share more details about what happens after you terminate the sync? I see it's in the phase "Terminating", so it may take some time. But I'm curious what eventually happens after that.

[hanikesn]

But I'm curious what eventually happens after that.

It's in this state until the sync window opens. I saw a pre-sync hook stuck in pending as well. I couldn't reproduce right now. But will closely monitor when it happens again in our CD pipeline.