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From Howard Chu <...@symas.com>
Subject Re: [jira] [Created] (DIRSERVER-1651) rfc 4533 implementation differences between openldap and apacheDS
Date Wed, 31 Aug 2011 20:36:43 GMT
Hajo Kliemeck (JIRA) wrote:
> rfc 4533 implementation differences between openldap and apacheDS

> Tthere is an incompatibility between the RFC 4533 implementation of apacheDS and openldap.
> openldap uses the cookie structure "rid=<replicaId>" (initial) or
"rid=<replicaId>,csn=<Csn value>" (update) while apacheDS is using NULL for
the initial state and the structure"<replicaId>;<Csn value>" for the update
state. in the RFC its said:
>
> {quote} The absence of a cookie or an initialized synchronization state in
> a cookie
indicates a request for initial content.....
> {quote}
> first is apacheDS like, second is openldap like
>
> It should be possible to adapt the structure or the behavior.

Note that if you don't send <replicaId> in your initial query, the provider 
cannot possibly know what replicaId to use in the first cookie it sends back 
to you.

There's a desire to ensure that a cookie unambiguously defines a specific 
provider-consumer relationship, and that a given cookie cannot be used with a 
different provider or a different consumer. (In practice this doesn't matter 
at all to the replication protocol, but keeping replicaIDs straight aids in 
debugging when you're looking at hex dumps of packet traces.)
-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/

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