Merge pull request #55826 from madhanrm/portmap

Automatic merge from submit-queue (batch tested with PRs 55697, 55631, 51905, 55647, 55826). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

GetPodPortMappings should return nil error if checkpoint returns with KeyNotFound error

**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #55819 

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/kubelet/dockershim/docker_service.go

@@ -44,6 +44,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubelet/network/kubenet"
 	"k8s.io/kubernetes/pkg/kubelet/server/streaming"
 	"k8s.io/kubernetes/pkg/kubelet/util/cache"
+	utilstore "k8s.io/kubernetes/pkg/kubelet/util/store"
 
 	"k8s.io/kubernetes/pkg/kubelet/dockershim/libdocker"
 	"k8s.io/kubernetes/pkg/kubelet/dockershim/metrics"
@@ -365,6 +366,9 @@ func (ds *dockerService) GetPodPortMappings(podSandboxID string) ([]*hostport.Po
 	checkpoint, err := ds.checkpointHandler.GetCheckpoint(podSandboxID)
 	// Return empty portMappings if checkpoint is not found
 	if err != nil {
+		if err == utilstore.ErrKeyNotFound {
+			return nil, nil
+		}
 		return nil, err
 	}