Retry job update after failure to prevent modification conflict

test/e2e/batch_v1_jobs.go

@@ -204,8 +204,9 @@ var _ = framework.KubeDescribe("V1Job", func() {
 			// the job stabilized and won't be synced until modification or full
 			// resync happens, we don't want to wait for the latter so we force
 			// sync modifying it
-			job.Spec.Parallelism = &completions
-			job, err = updateV1Job(f.ClientSet, f.Namespace.Name, job)
+			_, err = framework.UpdateJobWithRetries(f.ClientSet, f.Namespace.Name, job.Name, func(update *batch.Job) {
+				update.Spec.Parallelism = &completions
+			})
 			Expect(err).NotTo(HaveOccurred())
 			err = waitForV1JobFail(f.ClientSet, f.Namespace.Name, job.Name, v1JobTimeout)
 		}

test/e2e/framework/BUILD

@@ -39,6 +39,7 @@ go_library(
         "//pkg/api/validation:go_default_library",
         "//pkg/apimachinery/registered:go_default_library",
         "//pkg/apis/apps:go_default_library",
+        "//pkg/apis/batch:go_default_library",
         "//pkg/apis/componentconfig:go_default_library",
         "//pkg/apis/extensions:go_default_library",
         "//pkg/client/clientset_generated/internalclientset:go_default_library",

test/e2e/framework/util.go

@@ -49,6 +49,7 @@ import (
 	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/apimachinery/registered"
 	"k8s.io/kubernetes/pkg/apis/apps"
+	"k8s.io/kubernetes/pkg/apis/batch"
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/release_1_5"
@@ -3388,6 +3389,30 @@ func UpdateStatefulSetWithRetries(c clientset.Interface, namespace, name string,
 	return statefulSet, pollErr
 }
 
+type updateJobFunc func(*batch.Job)
+
+func UpdateJobWithRetries(c clientset.Interface, namespace, name string, applyUpdate updateJobFunc) (job *batch.Job, err error) {
+	jobs := c.Batch().Jobs(namespace)
+	var updateErr error
+	pollErr := wait.PollImmediate(10*time.Millisecond, 1*time.Minute, func() (bool, error) {
+		if job, err = jobs.Get(name); err != nil {
+			return false, err
+		}
+		// Apply the update, then attempt to push it to the apiserver.
+		applyUpdate(job)
+		if job, err = jobs.Update(job); err == nil {
+			Logf("Updating job %s", name)
+			return true, nil
+		}
+		updateErr = err
+		return false, nil
+	})
+	if pollErr == wait.ErrWaitTimeout {
+		pollErr = fmt.Errorf("couldn't apply the provided updated to job %q: %v", name, updateErr)
+	}
+	return job, pollErr
+}
+
 // NodeAddresses returns the first address of the given type of each node.
 func NodeAddresses(nodelist *api.NodeList, addrType api.NodeAddressType) []string {
 	hosts := []string{}

test/e2e/job.go

@@ -193,8 +193,9 @@ var _ = framework.KubeDescribe("Job", func() {
 			// the job stabilized and won't be synced until modification or full
 			// resync happens, we don't want to wait for the latter so we force
 			// sync modifying it
-			job.Spec.Parallelism = &completions
-			job, err = updateJob(f.ClientSet, f.Namespace.Name, job)
+			_, err = framework.UpdateJobWithRetries(f.ClientSet, f.Namespace.Name, job.Name, func(update *batch.Job) {
+				update.Spec.Parallelism = &completions
+			})
 			Expect(err).NotTo(HaveOccurred())
 			err = waitForJobFail(f.ClientSet, f.Namespace.Name, job.Name, jobTimeout)
 		}