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  1. OpenShift Bugs
  2. OCPBUGS-32678

Panic in cluster version operator code

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    • Quality / Stability / Reliability
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    • OTA 256, OTA 257
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    • Bug Fix
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      * Previously, on rare conditions, a race condition between Go routines caused the Cluster Version Operator (CVO) to panic after the CVO started. With this release, the Go routines synchronization is improved and the issue is resolved. (link:https://issues.redhat.com/browse/OCPBUGS-32678[*OCPBUGS-32678*])
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      * Previously, on rare conditions, a race condition between Go routines caused the Cluster Version Operator (CVO) to panic after the CVO started. With this release, the Go routines synchronization is improved and the issue is resolved. (link: https://issues.redhat.com/browse/OCPBUGS-32678 [* OCPBUGS-32678 *])
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      This payload run detects a panic in CVO code. The following payloads did not see the same panic. Bug should be prioritized by CVO team accordingly.

      Relevant Job run: https://prow.ci.openshift.org/view/gs/test-platform-results/logs/periodic-ci-openshift-release-master-ci-4.16-e2e-gcp-ovn-upgrade/1782008003688402944

      Panic trace as showed in this log:

      I0421 13:06:29.113325       1 availableupdates.go:61] First attempt to retrieve available updates
I0421 13:06:29.119731       1 cvo.go:721] Finished syncing available updates "openshift-cluster-version/version" (6.46969ms)
I0421 13:06:29.120687       1 sync_worker.go:229] Notify the sync worker: Cluster operator etcd changed Degraded from "False" to "True"
I0421 13:06:29.120697       1 sync_worker.go:579] Cluster operator etcd changed Degraded from "False" to "True"
E0421 13:06:29.121014       1 runtime.go:79] Observed a panic: "invalid memory address or nil pointer dereference" (runtime error: invalid memory address or nil pointer dereference)
goroutine 185 [running]:
k8s.io/apimachinery/pkg/util/runtime.logPanic({0x1bbc580?, 0x30cdc90})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:75 +0x85
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0x1e3efe0?})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:49 +0x6b
panic({0x1bbc580?, 0x30cdc90?})
	/usr/lib/golang/src/runtime/panic.go:914 +0x21f
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWork).calculateNextFrom(0xc002944000, 0x0)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:725 +0x58
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start.func1()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:584 +0x2f2
k8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1(0x30?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:226 +0x33
k8s.io/apimachinery/pkg/util/wait.BackoffUntil(0xc000101800?, {0x2194c80, 0xc0026245d0}, 0x1, 0xc000118120)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:227 +0xaf
k8s.io/apimachinery/pkg/util/wait.JitterUntil(0x0?, 0x989680, 0x0, 0x0?, 0x0?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:204 +0x7f
k8s.io/apimachinery/pkg/util/wait.Until(...)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:161
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start(0xc002398c80, {0x21b41b8, 0xc0004be230}, 0x10)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:564 +0x135
github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run.func2()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:431 +0x5d
created by github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run in goroutine 118
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:429 +0x49d
E0421 13:06:29.121188       1 runtime.go:79] Observed a panic: "invalid memory address or nil pointer dereference" (runtime error: invalid memory address or nil pointer dereference)
goroutine 185 [running]:
k8s.io/apimachinery/pkg/util/runtime.logPanic({0x1bbc580?, 0x30cdc90})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:75 +0x85
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0xc000000002?})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:49 +0x6b
panic({0x1bbc580?, 0x30cdc90?})
	/usr/lib/golang/src/runtime/panic.go:914 +0x21f
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0x1e3efe0?})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:56 +0xcd
panic({0x1bbc580?, 0x30cdc90?})
	/usr/lib/golang/src/runtime/panic.go:914 +0x21f
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWork).calculateNextFrom(0xc002944000, 0x0)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:725 +0x58
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start.func1()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:584 +0x2f2
k8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1(0x30?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:226 +0x33
k8s.io/apimachinery/pkg/util/wait.BackoffUntil(0xc000101800?, {0x2194c80, 0xc0026245d0}, 0x1, 0xc000118120)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:227 +0xaf
k8s.io/apimachinery/pkg/util/wait.JitterUntil(0x0?, 0x989680, 0x0, 0x0?, 0x0?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:204 +0x7f
k8s.io/apimachinery/pkg/util/wait.Until(...)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:161
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start(0xc002398c80, {0x21b41b8, 0xc0004be230}, 0x10)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:564 +0x135
github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run.func2()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:431 +0x5d
created by github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run in goroutine 118
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:429 +0x49d
I0421 13:06:29.120720       1 cvo.go:738] Started syncing upgradeable "openshift-cluster-version/version"
I0421 13:06:29.123165       1 upgradeable.go:69] Upgradeability last checked 5.274200045s ago, will not re-check until 2024-04-21T13:08:23Z
I0421 13:06:29.123195       1 cvo.go:740] Finished syncing upgradeable "openshift-cluster-version/version" (2.469943ms)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x58 pc=0x195c018]

goroutine 185 [running]:
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0xc000000002?})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:56 +0xcd
panic({0x1bbc580?, 0x30cdc90?})
	/usr/lib/golang/src/runtime/panic.go:914 +0x21f
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0x1e3efe0?})
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:56 +0xcd
panic({0x1bbc580?, 0x30cdc90?})
	/usr/lib/golang/src/runtime/panic.go:914 +0x21f
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWork).calculateNextFrom(0xc002944000, 0x0)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:725 +0x58
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start.func1()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:584 +0x2f2
k8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1(0x30?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:226 +0x33
k8s.io/apimachinery/pkg/util/wait.BackoffUntil(0xc000101800?, {0x2194c80, 0xc0026245d0}, 0x1, 0xc000118120)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:227 +0xaf
k8s.io/apimachinery/pkg/util/wait.JitterUntil(0x0?, 0x989680, 0x0, 0x0?, 0x0?)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:204 +0x7f
k8s.io/apimachinery/pkg/util/wait.Until(...)
	/go/src/github.com/openshift/cluster-version-operator/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:161
github.com/openshift/cluster-version-operator/pkg/cvo.(*SyncWorker).Start(0xc002398c80, {0x21b41b8, 0xc0004be230}, 0x10)
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/sync_worker.go:564 +0x135
github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run.func2()
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:431 +0x5d
created by github.com/openshift/cluster-version-operator/pkg/cvo.(*Operator).Run in goroutine 118
	/go/src/github.com/openshift/cluster-version-operator/pkg/cvo/cvo.go:429 +0x49d

              dhurta@redhat.com David Hurta
              kenzhang@redhat.com Ken Zhang
              None
              None
              Dinesh Kumar S Dinesh Kumar S
              Olivia Brown Olivia Brown
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