Fix unit tests race condition #340

Danil-Grigorev · 2020-07-20T15:58:57Z

In places where the goroutine is spawned, the channels passed into
the methods should not be inherited from the previous block, or in
a parallel environment the variables could be overwritten or closed
by another routine. Passing the variables via argument will ensure
such a thing won't appear, and operations will be atomic.

go test -race -cover ./cmd/... ./pkg/... -count=30

WARNING: DATA RACE
Write at 0x00c0001e9dd0 by goroutine 88:
  runtime.mapassign()
      /usr/lib/golang/src/runtime/map.go:574 +0x0
  k8s.io/apimachinery/pkg/runtime.(*Scheme).AddUnversionedTypes()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/runtime/scheme.go:160 +0x2be
  k8s.io/apimachinery/pkg/apis/meta/v1.AddToGroupVersion()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/apis/meta/v1/register.go:76 +0x6b2
  github.com/openshift/machine-api-operator/pkg/apis/machine/v1beta1.addKnownTypes()
      /home/dgrigore/go/pkg/mod/github.com/openshift/[email protected]/pkg/apis/machine/v1beta1/register.go:43 +0x401
  k8s.io/apimachinery/pkg/runtime.(*SchemeBuilder).AddToScheme()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/runtime/scheme_builder.go:29 +0x9e
  k8s.io/apimachinery/pkg/runtime.(*SchemeBuilder).AddToScheme-fm()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/runtime/scheme_builder.go:27 +0x4b
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.glob..func3()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/termination_suite_test.go:59 +0x278
  github.com/onsi/ginkgo/internal/leafnodes.(*runner).runSync()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/leafnodes/runner.go:113 +0xdf
  github.com/onsi/ginkgo/internal/leafnodes.(*runner).run()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/leafnodes/runner.go:64 +0x107
  github.com/onsi/ginkgo/internal/leafnodes.(*simpleSuiteNode).Run()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/leafnodes/suite_nodes.go:25 +0xb2
  github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).runBeforeSuite()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/specrunner/spec_runner.go:123 +0x160
  github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).Run()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/specrunner/spec_runner.go:63 +0xcf
  github.com/onsi/ginkgo/internal/suite.(*Suite).Run()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/internal/suite/suite.go:62 +0x69f
  github.com/onsi/ginkgo.RunSpecsWithCustomReporters()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/ginkgo_dsl.go:226 +0x338
  github.com/onsi/ginkgo.RunSpecsWithDefaultAndCustomReporters()
      /home/dgrigore/go/pkg/mod/github.com/onsi/[email protected]/ginkgo_dsl.go:214 +0x11f
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.TestReconciler()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/termination_suite_test.go:50 +0x138
  testing.tRunner()
      /usr/lib/golang/src/testing/testing.go:909 +0x199

Previous read at 0x00c0001e9dd0 by goroutine 198:
  runtime.mapaccess2()
      /usr/lib/golang/src/runtime/map.go:453 +0x0
  k8s.io/apimachinery/pkg/runtime.(*Scheme).ObjectKinds()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/runtime/scheme.go:260 +0x38c
  k8s.io/apimachinery/pkg/runtime.(*parameterCodec).EncodeParameters()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/pkg/runtime/codec.go:191 +0x88
  k8s.io/client-go/rest.(*Request).SpecificallyVersionedParams()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/rest/request.go:351 +0xe2
  sigs.k8s.io/controller-runtime/pkg/client.(*typedClient).List()
      /home/dgrigore/go/pkg/mod/k8s.io/[email protected]/rest/request.go:344 +0x395
  sigs.k8s.io/controller-runtime/pkg/client.(*client).List()
      /home/dgrigore/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/client/client.go:174 +0x147
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).getMachineForNode()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/handler.go:133 +0x1be
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).run()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/handler.go:92 +0xcd
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).Run.func1()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/handler.go:74 +0x72

Goroutine 88 (running) created at:
  testing.(*T).Run()
      /usr/lib/golang/src/testing/testing.go:960 +0x651
  testing.runTests.func1()
      /usr/lib/golang/src/testing/testing.go:1202 +0xa6
  testing.tRunner()
      /usr/lib/golang/src/testing/testing.go:909 +0x199
  testing.runTests()
      /usr/lib/golang/src/testing/testing.go:1200 +0x521
  testing.(*M).Run()
      /usr/lib/golang/src/testing/testing.go:1117 +0x2ff
  main.main()
      _testmain.go:92 +0x337

Goroutine 198 (finished) created at:
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).Run()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/handler.go:73 +0x163
  sigs.k8s.io/cluster-api-provider-aws/pkg/termination.StartTestHandler.func1()
      /home/dgrigore/go/src/github.com/openshift/cluster-api-provider-aws/pkg/termination/termination_suite_test.go:85 +0x48

CI failure example:

 goroutine 823 [running]:
	goroutine running on other thread; stack unavailable
created by sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).Run
	/go/src/sigs.k8s.io/cluster-api-provider-aws/pkg/termination/handler.go:73 +0x164
goroutine 866 [select]:
sigs.k8s.io/cluster-api-provider-aws/pkg/termination.(*handler).Run(0xc00053ca50, 0xc00022cde0, 0x0, 0x0)
	/go/src/sigs.k8s.io/cluster-api-provider-aws/pkg/termination/handler.go:77 +0x230
sigs.k8s.io/cluster-api-provider-aws/pkg/termination.StartTestHandler.func1(0xc00022ce40, 0x22137a0, 0xc00053ca50, 0xc00022cde0)
	/go/src/sigs.k8s.io/cluster-api-provider-aws/pkg/termination/termination_suite_test.go:85 +0x49
created by sigs.k8s.io/cluster-api-provider-aws/pkg/termination.StartTestHandler
	/go/src/sigs.k8s.io/cluster-api-provider-aws/pkg/termination/termination_suite_test.go:84 +0xab

In places where the goroutine is spawned, the channels passed into the methods should not be inherited from previous block, or in a parallel environment the variables could be overritten or closed by another routine. Passing the variables via argument will ensure such thing won't appear, and operations will be atomic.

openshift-ci-robot · 2020-07-20T15:59:19Z

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openshift-ci-robot · 2020-07-20T16:19:45Z

@Danil-Grigorev: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/unit	`2857821`	link	`/test unit`

Full PR test history. Your PR dashboard.

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JoelSpeed · 2020-07-21T09:35:06Z

I think this race may actually be fixed by #337 (I saw the error before and included a "fix"(?) for it in that PR)

Danil-Grigorev · 2020-08-31T11:04:31Z

/close fixed with #337

openshift-ci-robot requested review from alexander-demicev and michaelgugino July 20, 2020 15:59

Danil-Grigorev mentioned this pull request Jul 20, 2020

BUG 1858400: [Performance] Lease refresh period for machine-api-controllers is too high, causes heavy writes to etcd at idle #339

Merged

Danil-Grigorev mentioned this pull request Jul 22, 2020

Ensure we are testing scheme registration for termination handler #337

Merged

Danil-Grigorev closed this Aug 31, 2020

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Fix unit tests race condition #340

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