Bug 1869310

Summary:	CoreDNS pods observing panic without any provbe failures
Product:	OpenShift Container Platform	Reporter:	OpenShift BugZilla Robot <openshift-bugzilla-robot>
Component:	Networking	Assignee:	Stephen Greene <sgreene>
Networking sub component:	DNS	QA Contact:	Hongan Li <hongli>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	medium
Priority:	unspecified	CC:	aos-bugs, apjagtap, dhansen, eparis, mjoseph, scott.worthington
Version:	4.4	Keywords:	FeatureBackport, UpcomingSprint
Target Milestone:	---
Target Release:	4.4.z
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Cause: Running CoreDNS 1.6.6 Consequence: Intermittent `invalid memory address or nil pointer dereference` followed by timeouts in kube API access Fix: Backport CoreDNS#4022 to OCP, which fixes handling errors with Endpoint Tombstones. Result: CoreDNS behaves as intended without intermittent panics.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-22 06:58:40 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1869309
Bug Blocks:

Comment 1 Stephen Greene 2020-08-20 15:50:54 UTC

Adding upcoming spring while this backport awaits it's parent BZ to be verified.

Comment 4 Hongan Li 2020-09-14 08:39:08 UTC

verified with 4.4.0-0.nightly-2020-09-12-055214 and passed

Comment 7 errata-xmlrpc 2020-09-22 06:58:40 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 (OpenShift Container Platform 4.4.23 bug fix 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/RHBA-2020:3715