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Bug 1563079

Summary: adjustment of csn_generator can fail so next generated csn can be equal to the most recent one received [rhel-7.5.z]
Product: Red Hat Enterprise Linux 7 Reporter: Oneata Mircea Teodor <toneata>
Component: 389-ds-baseAssignee: mreynolds
Status: CLOSED ERRATA QA Contact: Viktor Ashirov <vashirov>
Severity: unspecified Docs Contact: Marc Muehlfeld <mmuehlfe>
Priority: high    
Version: 7.4CC: amsharma, mkosek, mreynolds, msauton, nkinder, rmeggins, tbordaz
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: 389-ds-base-1.3.7.5-21.el7_5 Doc Type: Bug Fix
Doc Text:
In a Directory Server replication topology, updates are managed by using Change Sequence Numbers (CSN) based on time stamps. New CSNs must be higher than the highest CSN present in the replica update vector (RUV). In case the server generates a new CSN in the same second as the most recent CSN, the sequence number is increased to ensure that it is higher. However, if the most recent CSN and the new CSN were identical, the sequence number was not increased. In this situation, the new CSN was, except the replica ID, identical to the most recent one. As a consequence, a new update in the directory appeared in certain situations older than the most recent update. With this update, Directory Server increases the CSN if the sequence number is lower or equal to the most recent one. As a result, new updates are no longer considered older than the most recent data.
 Story Points: ---
Clone Of: 1559945 Environment:
Last Closed: 2018-05-14 16:09:58 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: 1559945    
Bug Blocks:    

Description Oneata Mircea Teodor 2018-04-03 07:00:32 UTC 
This bug has been copied from bug #1559945 and has been proposed to be backported to 7.5 z-stream (EUS).
Comment 16 errata-xmlrpc 2018-05-14 16:09:58 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, 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-2018:1380