craigcondit commented on a change in pull request #359:
URL: 
https://github.com/apache/incubator-yunikorn-k8shim/pull/359#discussion_r791158892



##########
File path: pkg/cache/context.go
##########
@@ -365,19 +366,68 @@ func (ctx *Context) bindPodVolumes(pod *v1.Pod) error {
                                zap.String("podName", pod.Name))
                } else {
                        log.Logger().Info("Binding Pod Volumes", 
zap.String("podName", pod.Name))
-                       boundClaims, claimsToBind, _, err := 
ctx.apiProvider.GetAPIs().VolumeBinder.GetPodVolumes(assumedPod)
+                       boundClaims, claimsToBind, unboundClaimsImmediate, err 
:= ctx.apiProvider.GetAPIs().VolumeBinder.GetPodVolumes(assumedPod)
                        if err != nil {
+                               log.Logger().Error("Failed to get pod volumes",
+                                       zap.String("podName", assumedPod.Name),
+                                       zap.Error(err))
+                               return err
+                       }
+                       if len(unboundClaimsImmediate) > 0 {
+                               err = fmt.Errorf("pod %s has unbound immediate 
claims", pod.Name)
+                               log.Logger().Error("Pod has unbound immediate 
claims",
+                                       zap.String("podName", assumedPod.Name),
+                                       zap.Error(err))
                                return err
                        }
                        node, err := 
ctx.schedulerCache.GetNodeInfo(assumedPod.Spec.NodeName)
                        if err != nil {
+                               log.Logger().Error("Failed to get node info",
+                                       zap.String("podName", assumedPod.Name),
+                                       zap.String("nodeName", 
assumedPod.Spec.NodeName),
+                                       zap.Error(err))
+                               return err
+                       }
+                       volumes, reasons, err := 
ctx.apiProvider.GetAPIs().VolumeBinder.FindPodVolumes(assumedPod, boundClaims, 
claimsToBind, node)
+                       if err != nil {
+                               log.Logger().Error("Failed to find pod volumes",
+                                       zap.String("podName", assumedPod.Name),
+                                       zap.String("nodeName", 
assumedPod.Spec.NodeName),
+                                       zap.Int("claimsToBind", 
len(claimsToBind)),
+                                       zap.Error(err))
                                return err
                        }
-                       volumes, _, err := 
ctx.apiProvider.GetAPIs().VolumeBinder.FindPodVolumes(assumedPod, boundClaims, 
claimsToBind, node)
+                       if len(reasons) > 0 {
+                               sReasons := make([]string, 0)
+                               for _, reason := range reasons {
+                                       sReasons = append(sReasons, 
string(reason))
+                               }
+                               sReason := strings.Join(sReasons, ", ")
+                               err = fmt.Errorf("pod %s has conflicting volume 
claims: %s", pod.Name, sReason)
+                               log.Logger().Error("Pod has conflicting volume 
claims",
+                                       zap.String("podName", assumedPod.Name),
+                                       zap.String("nodeName", 
assumedPod.Spec.NodeName),
+                                       zap.Int("claimsToBind", 
len(claimsToBind)),
+                                       zap.Error(err))
+                               return err
+                       }
+                       if volumes.StaticBindings == nil {
+                               // convert nil to empty array
+                               volumes.StaticBindings = 
make([]*scheduling.BindingInfo, 0)
+                       }
+                       if volumes.DynamicProvisions == nil {
+                               // convert nil to empty array
+                               volumes.DynamicProvisions = 
make([]*v1.PersistentVolumeClaim, 0)
+                       }

Review comment:
       This is the actual fix -- don't allow the slices within volumes to be 
nil.




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