fix: fix bugs in throttler and syncManager initialization in WorkflowController

workflow/controller/controller.go

@@ -365,7 +365,7 @@ func (wfc *WorkflowController) initManagers(ctx context.Context) error {
 		labelSelector = labelSelector.Add(*req)
 	}
 	listOpts := metav1.ListOptions{LabelSelector: labelSelector.String()}
-	wfList, err := wfc.wfclientset.ArgoprojV1alpha1().Workflows(wfc.namespace).List(ctx, listOpts)
+	wfList, err := wfc.wfclientset.ArgoprojV1alpha1().Workflows(wfc.GetManagedNamespace()).List(ctx, listOpts)
 	if err != nil {
 		return err
 	}

workflow/controller/controller_test.go

@@ -308,6 +308,14 @@ func expectWorkflow(ctx context.Context, controller *WorkflowController, name st
 	test(wf)
 }
 
+func expectNamespacedWorkflow(ctx context.Context, controller *WorkflowController, namespace, name string, test func(wf *wfv1.Workflow)) {
+	wf, err := controller.wfclientset.ArgoprojV1alpha1().Workflows(namespace).Get(ctx, name, metav1.GetOptions{})
+	if err != nil {
+		panic(err)
+	}
+	test(wf)
+}
+
 func getPod(woc *wfOperationCtx, name string) (*apiv1.Pod, error) {
 	return woc.controller.kubeclientset.CoreV1().Pods(woc.wf.Namespace).Get(context.Background(), name, metav1.GetOptions{})
 }
@@ -794,9 +802,6 @@ func TestParallelismWithInitializeRunningWorkflows(t *testing.T) {
 		"Parallelism": func(x *WorkflowController) {
 			x.Config.Parallelism = 1
 		},
-		"NamespaceParallelism": func(x *WorkflowController) {
-			x.Config.NamespaceParallelism = 1
-		},
 	} {
 		t.Run(tt, func(t *testing.T) {
 			cancel, controller := newController(
@@ -860,6 +865,109 @@ status:
 	}
 }
 
+func TestNamespaceParallelismWithInitializeRunningWorkflows(t *testing.T) {
+	for tt, f := range map[string]func(controller *WorkflowController){
+		"NamespaceParallelism": func(x *WorkflowController) {
+			x.Config.NamespaceParallelism = 1
+		},
+	} {
+		t.Run(tt, func(t *testing.T) {
+			cancel, controller := newController(
+				wfv1.MustUnmarshalWorkflow(`
+metadata:
+  name: my-ns-0-wf-0
+  namespace: ns-0
+  creationTimestamp: 2023-06-13T16:39:00Z
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      container:
+        image: my-image
+`),
+				wfv1.MustUnmarshalWorkflow(`
+metadata:
+  name: my-ns-1-wf-0
+  namespace: ns-1
+  creationTimestamp: 2023-06-13T16:40:00Z
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      container:
+        image: my-image
+`),
+				wfv1.MustUnmarshalWorkflow(`
+metadata:
+  name: my-ns-0-wf-1
+  namespace: ns-0
+  creationTimestamp: 2023-06-13T16:41:00Z
+  labels:
+    workflows.argoproj.io/phase: Running
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      container:
+        image: my-image
+status:
+  phase: Running
+`),
+				wfv1.MustUnmarshalWorkflow(`
+metadata:
+  name: my-ns-1-wf-1
+  namespace: ns-1
+  creationTimestamp: 2023-06-13T16:42:00Z
+  labels:
+    workflows.argoproj.io/phase: Running
+spec:
+  entrypoint: main
+  templates:
+    - name: main
+      container:
+        image: my-image
+status:
+  phase: Running
+`),
+				f,
+			)
+			defer cancel()
+			ctx := context.Background()
+
+			ns0PendingWfTested := false
+			ns1PendingWfTested := false
+			for {
+				assert.True(t, controller.processNextItem(ctx))
+				if !ns0PendingWfTested {
+					expectNamespacedWorkflow(ctx, controller, "ns-0", "my-ns-0-wf-0", func(wf *wfv1.Workflow) {
+						if assert.NotNil(t, wf) {
+							if wf.Status.Phase != "" {
+								assert.Equal(t, wfv1.WorkflowPending, wf.Status.Phase)
+								assert.Equal(t, "Workflow processing has been postponed because too many workflows are already running", wf.Status.Message)
+								ns0PendingWfTested = true
+							}
+						}
+					})
+				}
+				if !ns1PendingWfTested {
+					expectNamespacedWorkflow(ctx, controller, "ns-1", "my-ns-1-wf-0", func(wf *wfv1.Workflow) {
+						if assert.NotNil(t, wf) {
+							if wf.Status.Phase != "" {
+								assert.Equal(t, wfv1.WorkflowPending, wf.Status.Phase)
+								assert.Equal(t, "Workflow processing has been postponed because too many workflows are already running", wf.Status.Message)
+								ns1PendingWfTested = true
+							}
+						}
+					})
+				}
+				if ns0PendingWfTested && ns1PendingWfTested {
+					break
+				}
+			}
+		})
+	}
+}
+
 func TestPodCleanupRetryIsReset(t *testing.T) {
 	wf := wfv1.MustUnmarshalWorkflow(`
 metadata: