https://bugs.openldap.org/show_bug.cgi?id=9341
Issue ID: 9341
Summary: Delta-sync MPR needs to be stable regardless of
ordering
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: replication
Severity: normal
Priority: ---
Component: backends
Assignee: bugs(a)openldap.org
Reporter: ondra(a)mistotebe.net
Target Milestone: ---
If two or more updates are spread across several providers before they have a
chance to learn about the others, all replicas need to arrive at the same
content regardless of the order in which they arrive.
One example that is broken at the moment:
- (csn a) server 1 accepts a modify
- (csn b) server 2 accepts a delete on the same DN
- (csn c) server 2 accepts an add on that DN again
If a replica receives the actions in the order bca vs. abc, the content of the
entry will be different even though the final CSN set is the same -> they will
never converge. The ordering 'bac' also needs to result in eventual
convergence, even if it means a refresh or replication from either provider
stalling temporarily?
Merge request with this test case (so far):
https://git.openldap.org/openldap/openldap/-/merge_requests/145
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