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Re: Openldap 2.4.44 syncprov delays

To: Quanah Gibson-Mount <quanah@zimbra.com>, "openldap-technical@openldap.org" <openldap-technical@openldap.org>
Subject: Re: Openldap 2.4.44 syncprov delays
From: Frank Swasey <Frank.Swasey@uvm.edu>
Date: Mon, 4 Apr 2016 12:38:35 +0000
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Thread-topic: Openldap 2.4.44 syncprov delays

Quanah,

  The config and data are not something I can release to you in their current configuration.  Since this has not been seen before, I’ll do more digging and do my utmost to reproduce the failure with a configuration and data that I can share.

  Before I go a lot further - of the changes to syncprov that happened in 2.4.43 and 2.4.44 is any more likely than the others to be at the root of this issue?  

—
Frank Swasey
Systems Architecture & Administration







-----Original Message-----
From: Quanah Gibson-Mount <quanah@zimbra.com>
Date: Friday, April 1, 2016 at 8:18 PM
To: Frank Swasey <Frank.Swasey@uvm.edu>, "openldap-technical@openldap.org" <openldap-technical@openldap.org>
Subject: Re: Openldap 2.4.44 syncprov delays

>
>--On Friday, April 01, 2016 11:41 PM +0000 Frank Swasey 
><Frank.Swasey@uvm.edu> wrote:
>
>>
>> Folks,
>>
>>
>>   I have recently upgraded my ldap servers (RHEL6, locally built RPM)
>> from 2.4.42 to 2.4.44.  After several days of chasing why our nagios
>> checks for syncrepl performance were reporting long delays, I gave up and
>> rolled the primary server back to 2.4.42.  This week I have built a
>> primary and replica on RHEL7 with 2.4.44 (again locally built) and have
>> just discovered through some intensive testing and log crawling that the
>> syncprov log entries (with loglevel sync) show up lacking the csn about
>> every hour, and if there are outstanding changes to be replicated when
>> that happens, the syncrepl check on the replica server starts reporting
>> it has fallen behind.  This behavior does not exhibit with the 2.4.42
>> code base.
>>
>>
>>   Is this the new normal? Is there something (that has not yet made it
>> into the guide) that I need to change in my syncprov/syncrepl
>> configuration to get around this?
>
>No, this would be a serious bug.  Can you provide related configs and test 
>data that reproduce the issue?  I've not seen anything like this w/ 
>delta-syncrepl MMR.
>
>--Quanah
>
>--
>
>Quanah Gibson-Mount
>Platform Architect
>Zimbra, Inc.
>--------------------
>Zimbra ::  the leader in open source messaging and collaboration
>A division of Synacor, Inc

Follow-Ups:
- Re: Openldap 2.4.44 syncprov delays
  - From: Frank Swasey <Frank.Swasey@uvm.edu>

References:
- Openldap 2.4.44 syncprov delays
  - From: Frank Swasey <Frank.Swasey@uvm.edu>
- Re: Openldap 2.4.44 syncprov delays
  - From: Quanah Gibson-Mount <quanah@zimbra.com>

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