Bug 1997465

Summary:	Fix panic in the LRU cache
Product:	OpenShift Container Platform	Reporter:	Michal Fojtik <mfojtik>
Component:	kube-apiserver	Assignee:	Michal Fojtik <mfojtik>
Status:	CLOSED ERRATA	QA Contact:	Ke Wang <kewang>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	4.9	CC:	aos-bugs, mfojtik, stbenjam, xxia
Target Milestone:	---
Target Release:	4.9.0
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-18 17:49:05 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Michal Fojtik 2021-08-25 09:56:46 UTC

Description of problem:

Upstream issue: https://github.com/kubernetes/kubernetes/issues/104452

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


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Comment 1 Michal Fojtik 2021-08-25 10:01:38 UTC

*** Bug 1995581 has been marked as a duplicate of this bug. ***

Comment 5 Ke Wang 2021-09-15 09:37:21 UTC

Searched the last 14 days for all kube-apiserver panic errors, but found the first relevant record which is duplicate to this bug, after that no longer seen related panic. 

$ w3m -dump -cols 200 'https://search.ci.openshift.org/?search=openshift-kube-apiserver_kube-apiserver.*panic&maxAge=336h&context=3&type=bug%2Bjunit&name=&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job' | grep -B4 'golang_lru.entry'

#1995581                                    bug         2 weeks ago                  kube apiserver panic from admissions controller ASSIGNED
Comment 15402545 by stbenjam at 2021-08-19T13:03:26Z
Symptom Detection.Undiagnosed panic detected in pod
pods/openshift-kube-apiserver_kube-apiserver-ci-op-62s95mxv-1368f-5s2lm-master-0_kube-apiserver_previous.log.gz:E0818 19:57:56.080795      17 runtime.go:78] Observed a panic: &runtime.TypeAssertionError{_interface:(*runtime._type)(0x4ad36a0), concrete:(*runtime._type)(nil), asserted:(*runtime._type)(0x4769e60), missingMethod:""} (interface conversion: interface {} is nil, not *golang_lru.entry)

At least for now, we can think it's not a problem anymore, the PR fix works fine, so move the bug VERIFIED.

Comment 7 errata-xmlrpc 2021-10-18 17:49:05 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: OpenShift Container Platform 4.9.0 bug fix and security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:3759