From d57391d0c702d4c8cbacb17a23eff6c49dbb2624 Mon Sep 17 00:00:00 2001
From: James Lu <james.lu@suse.com>
Date: Tue, 13 Jan 2026 10:32:20 +0800
Subject: [PATCH] fix: re-enqueue the snapshot CR for the snapshot deletion

during upgrading the engine.

longhorn/longhorn 10274

Signed-off-by: James Lu <james.lu@suse.com>
---
 controller/snapshot_controller.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/controller/snapshot_controller.go b/controller/snapshot_controller.go
index a4103157a6..364b5a7016 100644
--- a/controller/snapshot_controller.go
+++ b/controller/snapshot_controller.go
@@ -442,6 +442,13 @@ func (sc *SnapshotController) reconcile(snapshotName string) (err error) {
 			return err
 		}
 
+		if isEngineUpgrading(engine) {
+			// requeue the snapshot to wait for upgrading engine after 3 seconds
+			snapshot.Status.Error = fmt.Sprintf("snapshot deletion delayed: volume engine %v is upgrading from image %v to %v", engine.Name, engine.Status.CurrentImage, engine.Spec.Image)
+			sc.enqueueSnapshotAfter(snapshot, 3*time.Second)
+			return nil
+		}
+
 		defer func() {
 			engine, err = sc.ds.GetEngineRO(engine.Name)
 			if err != nil {