fix: resolve issue with jar upgrade not uploading new jar

Ensure the new jar is properly uploaded during an upgrade process. Previously, the jar was not replaced as expected.

internal/managed_job/upgrade.go

@@ -1,28 +1,38 @@
 package managed_job
 
 import (
-	"flink-kube-operator/internal/crd/v1alpha1"
 	"flink-kube-operator/pkg"
 
 	"go.uber.org/zap"
 )
 
 func (job *ManagedJob) upgrade() {
-	if job.def.Status.LastSavepointPath != nil {
-		pkg.Logger.Info("upgrading job ",
-			zap.String("jobName", job.def.GetName()),
-			zap.String("currentJarURI", job.def.Spec.JarURI),
-			zap.String("prevJarURI", *job.def.Status.RunningJarURI),
-		)
-		job.run()
-	} else {
-		err := "There is no savepoint path existing"
-		pkg.Logger.Error(err)
-		job.crd.Patch(job.def.UID, map[string]interface{}{
-			"status": map[string]interface{}{
-				"lifeCycleStatus": v1alpha1.LifeCycleStatusUpgradeFailed,
-				"error":           err,
-			},
-		})
+	pkg.Logger.Info("[managed-job] [upgrade] pausing... ",
+		zap.String("jobName", job.def.GetName()),
+		zap.String("currentJarURI", job.def.Spec.JarURI),
+		zap.String("prevJarURI", *job.def.Status.RunningJarURI),
+	)
+	job.def.Status.JarId = nil
+	job.crd.Patch(job.def.UID, map[string]interface{}{
+		"status": map[string]interface{}{
+			"jarId": job.def.Status.JarId,
+		},
+	})
+	err := job.pause()
+	if err != nil {
+		pkg.Logger.Error("[managed-job] [upgrade] error in pausing", zap.Error(err))
+		return
+	}
+	pkg.Logger.Info("[managed-job] [upgrade] restoring... ",
+		zap.String("jobName", job.def.GetName()),
+		zap.String("currentJarURI", job.def.Spec.JarURI),
+		zap.String("prevJarURI", *job.def.Status.RunningJarURI),
+		zap.Error(err),
+	)
+
+	err = job.run(true)
+	if err != nil {
+		pkg.Logger.Error("[managed-job] [upgrade] error in running", zap.Error(err))
+		return
 	}
 }