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[double close channel] TestCascadingDeletion during pull-kubernetes-unit-test flaky  #55652

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@hzxuzhonghu

Description

@hzxuzhonghu

Is this a BUG REPORT or FEATURE REQUEST?:

/kind bug

What happened:
https://k8s-gubernator.appspot.com/build/kubernetes-jenkins/pr-logs/pull/55575/pull-kubernetes-unit/64726/

go test -v k8s.io/kubernetes/test/integration/garbagecollector -run TestCascadingDeletion$
panic: close of closed channel
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:58 +0x111
/usr/local/go/src/runtime/panic.go:491 +0x283
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/graph_builder.go:259 +0xb80
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:123 +0x39
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:211 +0x20f
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:133 +0x5e
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:134 +0xbd
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:88 +0x4d
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/controller/garbagecollector/garbagecollector.go:172 +0xd9
/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/integration/garbagecollector/garbage_collector_test.go:268 +0xc9
				from junit_3a3d564eebb1750e5c904cc525d117617fc0af51_20171113-090812.xml

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

  • Kubernetes version (use kubectl version):
  • Cloud provider or hardware configuration:
  • OS (e.g. from /etc/os-release):
  • Kernel (e.g. uname -a):
  • Install tools:
  • Others:

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