fix: Workflow controller crash on nil pointer (argoproj#11770)

Signed-off-by: Dillen Padhiar <dillen_padhiar@intuit.com>
dpadhiar · May 9, 2024 · d072444 · d072444
1 parent cf496ea
commit d072444
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/workflow/controller/healthz.go b/workflow/controller/healthz.go
@@ -33,6 +33,11 @@ func (wfc *WorkflowController) Healthz(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			return err
 		}
+		// the wfc.wfInformer is nil if it is not the leader
+		if wfc.wfInformer == nil {
+			log.Info("healthz: current pod is not the leader")
+			return nil
+		}
 		lister := v1alpha1.NewWorkflowLister(wfc.wfInformer.GetIndexer())
 		list, err := lister.Workflows(wfc.managedNamespace).List(seletor)
 		if err != nil {