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Re: slapd: null_callback : error code 0x14



Thanks to Ondrej for persisting with getting to the bottom of this
rather annoying bug :-)

Unfortunately I won't be at LDAPCon this year otherwise I'd buy you a beer!

On 25/09/2017 15:31, Ondřej Kuzník wrote:
> On Fri, Sep 22, 2017 at 09:15:56PM -0700, Paul B. Henson wrote:
>> On Fri, Sep 22, 2017 at 08:50:38AM -0700, Quanah Gibson-Mount wrote:
>>> Oh, I thought you had said you only had two masters.  This could well be 
>>
>> Ah, my bad, there are a total of 4 nodes, and while technically I guess
>> they could all be "masters", only two of them ever receive writes, one
>> is the primary behind a hardware load balancer and the other is the
>> secondary; so in my head I have two masters and two read only systems.
>> Which I suppose isn't really accurate from an openldap architecture
>> perspective, sorry.
>>
>>> ITS#8444 (ignore the ITS title, it has nothing to do with memberOf), where 
>>> there are out of sync problems with 3+ MMR nodes and delta-syncrepl when 
>>> syncprov checkpoints.
>>
>> Oh, I remember that ITS, I thought I'd fixed that issue by getting rid
>> of the memberOf overlay and switching to dynlist 8-/. It seems since I
>> stopped paying attention to it it's moved on in other directions.
>>
>> I see there was a proposed patch posted on 8/25 that's been applied to
>> RE24, I'll add that to my system and see if the issue goes away. Am I
>> correct in my assumption that the patch only needs to be applied to the
>> system that is receiving the updates?
> 
> I'd apply it everywhere you have syncprov configured, these could send a
> cookie with too little information for a replica to spot and skip a
> duplicate.
> 

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