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  1. OpenShift Bugs
  2. OCPBUGS-38846

Machine-config daemon ListPools panic during tech-preview CI runs

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      This is a clone of issue OCPBUGS-37850. The following is the description of the original issue:
      —

      Description of problem:

      Occasional machine-config daemon panics in test-preview. For example this run has:

      https://prow.ci.openshift.org/view/gs/test-platform-results/pr-logs/pull/openshift_cluster-version-operator/1076/pull-ci-openshift-cluster-version-operator-master-e2e-aws-ovn-techpreview/1819082707058036736

      And the referenced logs include a full stack trace, the crux of which appears to be:

      E0801 19:23:55.012345    2908 runtime.go:79] Observed a panic: "invalid memory address or nil pointer dereference" (runtime error: invalid memory address or nil pointer dereference)
goroutine 127 [running]:
k8s.io/apimachinery/pkg/util/runtime.logPanic({0x2424b80, 0x4166150})
	/go/src/github.com/openshift/machine-config-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:75 +0x85
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0xc0004d5340?})
	/go/src/github.com/openshift/machine-config-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:49 +0x6b
panic({0x2424b80?, 0x4166150?})
	/usr/lib/golang/src/runtime/panic.go:770 +0x132
github.com/openshift/machine-config-operator/pkg/helpers.ListPools(0xc0007c5208, {0x0, 0x0})
	/go/src/github.com/openshift/machine-config-operator/pkg/helpers/helpers.go:142 +0x17d
github.com/openshift/machine-config-operator/pkg/helpers.GetPoolsForNode({0x0, 0x0}, 0xc0007c5208)
	/go/src/github.com/openshift/machine-config-operator/pkg/helpers/helpers.go:66 +0x65
github.com/openshift/machine-config-operator/pkg/daemon.(*PinnedImageSetManager).handleNodeEvent(0xc000a98480, {0x27e9e60?, 0xc0007c5208})
	/go/src/github.com/openshift/machine-config-operator/pkg/daemon/pinned_image_set.go:955 +0x92

      Version-Release number of selected component (if applicable):

      $ w3m -dump -cols 200 'https://search.dptools.openshift.org/?name=^periodic&type=junit&search=machine-config-daemon.*Observed+a+panic' | grep 'failures match'
periodic-ci-openshift-release-master-ci-4.17-e2e-azure-ovn-techpreview (all) - 37 runs, 62% failed, 13% of failures match = 8% impact
periodic-ci-openshift-release-master-ci-4.16-e2e-azure-ovn-techpreview-serial (all) - 6 runs, 83% failed, 20% of failures match = 17% impact
periodic-ci-openshift-release-master-ci-4.18-e2e-azure-ovn-techpreview (all) - 5 runs, 60% failed, 33% of failures match = 20% impact
periodic-ci-openshift-multiarch-master-nightly-4.17-ocp-e2e-aws-ovn-arm64-techpreview-serial (all) - 10 runs, 40% failed, 25% of failures match = 10% impact
periodic-ci-openshift-release-master-ci-4.17-e2e-aws-ovn-techpreview-serial (all) - 7 runs, 29% failed, 50% of failures match = 14% impact
periodic-ci-openshift-release-master-nightly-4.17-e2e-vsphere-ovn-techpreview-serial (all) - 7 runs, 100% failed, 14% of failures match = 14% impact
periodic-ci-openshift-release-master-nightly-4.18-e2e-vsphere-ovn-techpreview-serial (all) - 5 runs, 100% failed, 20% of failures match = 20% impact
periodic-ci-openshift-multiarch-master-nightly-4.17-ocp-e2e-aws-ovn-arm64-techpreview (all) - 10 runs, 40% failed, 25% of failures match = 10% impact
periodic-ci-openshift-release-master-ci-4.18-e2e-gcp-ovn-techpreview (all) - 5 runs, 40% failed, 50% of failures match = 20% impact
periodic-ci-openshift-release-master-ci-4.16-e2e-aws-ovn-techpreview-serial (all) - 6 runs, 17% failed, 200% of failures match = 33% impact
periodic-ci-openshift-release-master-nightly-4.16-e2e-vsphere-ovn-techpreview (all) - 6 runs, 17% failed, 100% of failures match = 17% impact
periodic-ci-openshift-release-master-nightly-4.17-e2e-aws-ovn-single-node-techpreview-serial (all) - 7 runs, 100% failed, 14% of failures match = 14% impact
periodic-ci-openshift-release-master-nightly-4.17-e2e-aws-ovn-single-node-techpreview (all) - 7 runs, 57% failed, 50% of failures match = 29% impact
periodic-ci-openshift-release-master-ci-4.16-e2e-aws-ovn-techpreview (all) - 6 runs, 17% failed, 100% of failures match = 17% impact
periodic-ci-openshift-release-master-ci-4.17-e2e-gcp-ovn-techpreview (all) - 18 runs, 17% failed, 33% of failures match = 6% impact
periodic-ci-openshift-release-master-ci-4.16-e2e-gcp-ovn-techpreview (all) - 6 runs, 17% failed, 100% of failures match = 17% impact
periodic-ci-openshift-multiarch-master-nightly-4.16-ocp-e2e-aws-ovn-arm64-techpreview-serial (all) - 11 runs, 18% failed, 50% of failures match = 9% impact
periodic-ci-openshift-release-master-ci-4.17-e2e-azure-ovn-techpreview-serial (all) - 7 runs, 57% failed, 25% of failures match = 14% impact

      How reproducible:

      looks like ~15% impact in those CI runs CI Search turns up.

      Steps to Reproduce:

      Run lots of CI. Look for MCD panics.

      Actual results

      CI Search results above.

      Expected results

      No hits.

              djoshy David Joshy
              openshift-crt-jira-prow OpenShift Prow Bot
              Sergio Regidor de la Rosa Sergio Regidor de la Rosa
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                Created:
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