Bug 2006912

Summary:	Notify timeout can induce a race condition as it attempts to resend the cache update
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Adam C. Emerson <aemerson>
Component:	RGW	Assignee:	Adam C. Emerson <aemerson>
Status:	CLOSED ERRATA	QA Contact:	Vidushi Mishra <vimishra>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	4.3	CC:	cbodley, ceph-eng-bugs, ceph-qe-bugs, kbader, mbenjamin, tserlin, vimishra, vivk
Target Milestone:	---
Target Release:	4.3
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ceph-14.2.22-5.el8cp, ceph-14.2.22-5.el7cp	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	2006949 (view as bug list)		Environment:
Last Closed:	2022-05-05 07:54:05 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:
Bug Depends On:
Bug Blocks:	2006949

Description Adam C. Emerson 2021-09-22 16:38:55 UTC

Description of problem:

On a heavily loaded cluster, the Notify operation can fail. Currently we retry sending the update, but this can lead to an A-B-A error.

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

4.3

How reproducible:

Nondeterministically

Steps to Reproduce:
1. Get a cluster with multiple RGWs per zone
2. Load it up heavily
3. Do some work on it

Actual results:

Cache consistency is maintained

Expected results:

Cache consistency is not maintained

Additional info:

This BZ added so a cherry-pick has something to resolve.

Comment 15 errata-xmlrpc 2022-05-05 07:54:05 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: Red Hat Ceph Storage 4.3 Security and 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/RHSA-2022:1716