diff --git a/changelogs/unreleased/8482-Lyndon-Li b/changelogs/unreleased/8482-Lyndon-Li
index c1cec7e241..33be17e0af 100644
--- a/changelogs/unreleased/8482-Lyndon-Li
+++ b/changelogs/unreleased/8482-Lyndon-Li
@@ -1 +1 @@
-Fix issue #8125, add diagnostic info for data mover exposers when expose timeout
\ No newline at end of file
+Fix issue #8125, log diagnostic info for data mover exposers when expose timeout
\ No newline at end of file
diff --git a/pkg/controller/data_download_controller.go b/pkg/controller/data_download_controller.go
index aad034b8ca..33be8a0af1 100644
--- a/pkg/controller/data_download_controller.go
+++ b/pkg/controller/data_download_controller.go
@@ -19,6 +19,7 @@ package controller
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/pkg/errors"
@@ -677,7 +678,10 @@ func (r *DataDownloadReconciler) onPrepareTimeout(ctx context.Context, dd *veler
 		return
 	}
 
-	log.Warn(r.restoreExposer.DiagnoseExpose(ctx, getDataDownloadOwnerObject(dd)))
+	diags := strings.Split(r.restoreExposer.DiagnoseExpose(ctx, getDataDownloadOwnerObject(dd)), "\n")
+	for _, diag := range diags {
+		log.Warnf("[Diagnose DD expose]%s", diag)
+	}
 
 	r.restoreExposer.CleanUp(ctx, getDataDownloadOwnerObject(dd))
 
diff --git a/pkg/controller/data_upload_controller.go b/pkg/controller/data_upload_controller.go
index 0c44bad660..6a2aadef32 100644
--- a/pkg/controller/data_upload_controller.go
+++ b/pkg/controller/data_upload_controller.go
@@ -19,6 +19,7 @@ package controller
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	snapshotter "github.com/kubernetes-csi/external-snapshotter/client/v7/clientset/versioned/typed/volumesnapshot/v1"
@@ -755,7 +756,10 @@ func (r *DataUploadReconciler) onPrepareTimeout(ctx context.Context, du *velerov
 			volumeSnapshotName = du.Spec.CSISnapshot.VolumeSnapshot
 		}
 
-		log.Warn(ep.DiagnoseExpose(ctx, getOwnerObject(du)))
+		diags := strings.Split(ep.DiagnoseExpose(ctx, getOwnerObject(du)), "\n")
+		for _, diag := range diags {
+			log.Warnf("[Diagnose DU expose]%s", diag)
+		}
 
 		ep.CleanUp(ctx, getOwnerObject(du), volumeSnapshotName, du.Spec.SourceNamespace)
 
diff --git a/pkg/exposer/csi_snapshot.go b/pkg/exposer/csi_snapshot.go
index 71c9a2a62d..9b9ebe5479 100644
--- a/pkg/exposer/csi_snapshot.go
+++ b/pkg/exposer/csi_snapshot.go
@@ -313,20 +313,23 @@ func (e *csiSnapshotExposer) DiagnoseExpose(ctx context.Context, ownerObject cor
 	backupPVCName := ownerObject.Name
 	backupVSName := ownerObject.Name
 
-	diag := fmt.Sprintf("***************************begin diagnose CSI exposer[%s/%s]***************************\n", ownerObject.Namespace, ownerObject.Name)
+	diag := "begin diagnose CSI exposer\n"
 
 	pod, err := e.kubeClient.CoreV1().Pods(ownerObject.Namespace).Get(ctx, backupPodName, metav1.GetOptions{})
 	if err != nil {
+		pod = nil
 		diag += fmt.Sprintf("error getting backup pod %s, err: %v\n", backupPodName, err)
 	}
 
 	pvc, err := e.kubeClient.CoreV1().PersistentVolumeClaims(ownerObject.Namespace).Get(ctx, backupPVCName, metav1.GetOptions{})
 	if err != nil {
+		pvc = nil
 		diag += fmt.Sprintf("error getting backup pvc %s, err: %v\n", backupPVCName, err)
 	}
 
 	vs, err := e.csiSnapshotClient.VolumeSnapshots(ownerObject.Namespace).Get(ctx, backupVSName, metav1.GetOptions{})
 	if err != nil {
+		vs = nil
 		diag += fmt.Sprintf("error getting backup vs %s, err: %v\n", backupVSName, err)
 	}
 
@@ -335,7 +338,7 @@ func (e *csiSnapshotExposer) DiagnoseExpose(ctx context.Context, ownerObject cor
 
 		if pod.Spec.NodeName != "" {
 			if err := nodeagent.KbClientIsRunningInNode(ctx, ownerObject.Namespace, pod.Spec.NodeName, e.kubeClient); err != nil {
-				diag += fmt.Sprintf("node-agent is not running in node %s\n", pod.Spec.NodeName)
+				diag += fmt.Sprintf("node-agent is not running in node %s, err: %v\n", pod.Spec.NodeName, err)
 			}
 		}
 	}
@@ -364,7 +367,7 @@ func (e *csiSnapshotExposer) DiagnoseExpose(ctx context.Context, ownerObject cor
 		}
 	}
 
-	diag += fmt.Sprintf("***************************end diagnose CSI exposer[%s/%s]***************************\n", ownerObject.Namespace, ownerObject.Name)
+	diag += "end diagnose CSI exposer"
 
 	return diag
 }
diff --git a/pkg/exposer/csi_snapshot_test.go b/pkg/exposer/csi_snapshot_test.go
index d7e4a768ed..77d7926356 100644
--- a/pkg/exposer/csi_snapshot_test.go
+++ b/pkg/exposer/csi_snapshot_test.go
@@ -1166,12 +1166,11 @@ func Test_csiSnapshotExposer_DiagnoseExpose(t *testing.T) {
 		{
 			name:        "no pod, pvc, vs",
 			ownerBackup: backup,
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 error getting backup pod fake-backup, err: pods "fake-backup" not found
 error getting backup pvc fake-backup, err: persistentvolumeclaims "fake-backup" not found
 error getting backup vs fake-backup, err: volumesnapshots.snapshot.storage.k8s.io "fake-backup" not found
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pod without node name, pvc without volume name, vs without status",
@@ -1183,13 +1182,12 @@ error getting backup vs fake-backup, err: volumesnapshots.snapshot.storage.k8s.i
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutStatus,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name 
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to 
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pod without node name, pvc without volume name, vs without VSC",
@@ -1201,13 +1199,12 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name 
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to 
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pod with node name, no node agent",
@@ -1219,14 +1216,13 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
-node-agent is not running in node fake-node
+node-agent is not running in node fake-node, err: daemonset pod not found in running state in node fake-node
 PVC velero/fake-backup, phase Pending, binding to 
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pod with node name, node agent is running",
@@ -1239,13 +1235,12 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to 
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pvc with volume name, no pv",
@@ -1258,14 +1253,13 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to fake-pv
 error getting backup pv fake-pv, err: persistentvolumes "fake-pv" not found
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "pvc with volume name, pv exists",
@@ -1279,14 +1273,13 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithoutVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to fake-pv
 PV fake-pv, phase Pending, reason , message fake-pv-message
 VS velero/fake-backup, bind to , readyToUse false, errMessage 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "vs with vsc, vsc doesn't exist",
@@ -1300,15 +1293,14 @@ VS velero/fake-backup, bind to , readyToUse false, errMessage
 			snapshotClientObj: []runtime.Object{
 				&backupVSWithVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to fake-pv
 PV fake-pv, phase Pending, reason , message fake-pv-message
 VS velero/fake-backup, bind to fake-vsc, readyToUse false, errMessage fake-vs-message
 error getting backup vsc fake-vsc, err: volumesnapshotcontents.snapshot.storage.k8s.io "fake-vsc" not found
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 		{
 			name:        "vs with vsc, vsc exists",
@@ -1323,15 +1315,14 @@ error getting backup vsc fake-vsc, err: volumesnapshotcontents.snapshot.storage.
 				&backupVSWithVSC,
 				&backupVSC,
 			},
-			expected: `***************************begin diagnose CSI exposer[velero/fake-backup]***************************
+			expected: `begin diagnose CSI exposer
 Pod velero/fake-backup, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-backup, phase Pending, binding to fake-pv
 PV fake-pv, phase Pending, reason , message fake-pv-message
 VS velero/fake-backup, bind to fake-vsc, readyToUse false, errMessage fake-vs-message
 VSC fake-vsc, readyToUse false, errMessage fake-vsc-message, handle 
-***************************end diagnose CSI exposer[velero/fake-backup]***************************
-`,
+end diagnose CSI exposer`,
 		},
 	}
 	for _, tt := range tests {
diff --git a/pkg/exposer/generic_restore.go b/pkg/exposer/generic_restore.go
index f523bce0a2..7a7df90385 100644
--- a/pkg/exposer/generic_restore.go
+++ b/pkg/exposer/generic_restore.go
@@ -204,15 +204,17 @@ func (e *genericRestoreExposer) DiagnoseExpose(ctx context.Context, ownerObject
 	restorePodName := ownerObject.Name
 	restorePVCName := ownerObject.Name
 
-	diag := fmt.Sprintf("***************************begin diagnose restore exposer[%s/%s]***************************\n", ownerObject.Namespace, ownerObject.Name)
+	diag := "begin diagnose restore exposer\n"
 
 	pod, err := e.kubeClient.CoreV1().Pods(ownerObject.Namespace).Get(ctx, restorePodName, metav1.GetOptions{})
 	if err != nil {
+		pod = nil
 		diag += fmt.Sprintf("error getting restore pod %s, err: %v\n", restorePodName, err)
 	}
 
 	pvc, err := e.kubeClient.CoreV1().PersistentVolumeClaims(ownerObject.Namespace).Get(ctx, restorePVCName, metav1.GetOptions{})
 	if err != nil {
+		pvc = nil
 		diag += fmt.Sprintf("error getting restore pvc %s, err: %v\n", restorePVCName, err)
 	}
 
@@ -221,7 +223,7 @@ func (e *genericRestoreExposer) DiagnoseExpose(ctx context.Context, ownerObject
 
 		if pod.Spec.NodeName != "" {
 			if err := nodeagent.KbClientIsRunningInNode(ctx, ownerObject.Namespace, pod.Spec.NodeName, e.kubeClient); err != nil {
-				diag += fmt.Sprintf("node-agent is not running in node %s\n", pod.Spec.NodeName)
+				diag += fmt.Sprintf("node-agent is not running in node %s, err: %v\n", pod.Spec.NodeName, err)
 			}
 		}
 	}
@@ -238,7 +240,7 @@ func (e *genericRestoreExposer) DiagnoseExpose(ctx context.Context, ownerObject
 		}
 	}
 
-	diag += fmt.Sprintf("***************************end diagnose restore exposer[%s/%s]***************************\n", ownerObject.Namespace, ownerObject.Name)
+	diag += "end diagnose restore exposer"
 
 	return diag
 }
diff --git a/pkg/exposer/generic_restore_test.go b/pkg/exposer/generic_restore_test.go
index bcc78b9810..2eec0ce182 100644
--- a/pkg/exposer/generic_restore_test.go
+++ b/pkg/exposer/generic_restore_test.go
@@ -646,11 +646,10 @@ func Test_ReastoreDiagnoseExpose(t *testing.T) {
 		{
 			name:         "no pod, pvc",
 			ownerRestore: restore,
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 error getting restore pod fake-restore, err: pods "fake-restore" not found
 error getting restore pvc fake-restore, err: persistentvolumeclaims "fake-restore" not found
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pod without node name, pvc without volume name, vs without status",
@@ -659,12 +658,11 @@ error getting restore pvc fake-restore, err: persistentvolumeclaims "fake-restor
 				&restorePodWithoutNodeName,
 				&restorePVCWithoutVolumeName,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name 
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-restore, phase Pending, binding to 
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pod without node name, pvc without volume name",
@@ -673,12 +671,11 @@ PVC velero/fake-restore, phase Pending, binding to
 				&restorePodWithoutNodeName,
 				&restorePVCWithoutVolumeName,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name 
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-restore, phase Pending, binding to 
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pod with node name, no node agent",
@@ -687,13 +684,12 @@ PVC velero/fake-restore, phase Pending, binding to
 				&restorePodWithNodeName,
 				&restorePVCWithoutVolumeName,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
-node-agent is not running in node fake-node
+node-agent is not running in node fake-node, err: daemonset pod not found in running state in node fake-node
 PVC velero/fake-restore, phase Pending, binding to 
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pod with node name, node agent is running",
@@ -703,12 +699,11 @@ PVC velero/fake-restore, phase Pending, binding to
 				&restorePVCWithoutVolumeName,
 				&nodeAgentPod,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-restore, phase Pending, binding to 
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pvc with volume name, no pv",
@@ -718,13 +713,12 @@ PVC velero/fake-restore, phase Pending, binding to
 				&restorePVCWithVolumeName,
 				&nodeAgentPod,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-restore, phase Pending, binding to fake-pv
 error getting restore pv fake-pv, err: persistentvolumes "fake-pv" not found
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 		{
 			name:         "pvc with volume name, pv exists",
@@ -735,13 +729,12 @@ error getting restore pv fake-pv, err: persistentvolumes "fake-pv" not found
 				&restorePV,
 				&nodeAgentPod,
 			},
-			expected: `***************************begin diagnose restore exposer[velero/fake-restore]***************************
+			expected: `begin diagnose restore exposer
 Pod velero/fake-restore, phase Pending, node name fake-node
 Pod condition Initialized, status True, reason , message fake-pod-message
 PVC velero/fake-restore, phase Pending, binding to fake-pv
 PV fake-pv, phase Pending, reason , message fake-pv-message
-***************************end diagnose restore exposer[velero/fake-restore]***************************
-`,
+end diagnose restore exposer`,
 		},
 	}
 	for _, test := range tests {