> On 6 Nov 2019, at 07:22, Iain Morgan <iain.mor...@nasa.gov> wrote:
> 
> Hello,
> 
> The list server seems to have delayed the original message for
> moderation, so I'mtrying again with a different subject.
> 
> I should note that the issue below may not be new: Even with our
> previous generation of LDAP servers, our regression tests were only ever
> run againsta single, non-replicated server.
> 
> -- 
> Iain Morgan
> ---- Forwarded message from Iain Morgan <iain.mor...@nasa.gov> -----
> 
> Date: Mon, 4 Nov 2019 17:11:52 -0800
> From: Iain Morgan <iain.mor...@nasa.gov>
> To: 389-users@lists.fedoraproject.org
> Subject: Unexpected 'admin limit exceeded' error
> 
> Hello,
> 
> I have a set of tests that are run against 389s a large number of times
> as part of our regular testing. The tests primarily simulate account and
> group
> group management operations although there is also some testing of the
> password policy enforcement.
> 
> These tests were running fine against a single server configured without
> replication. However, I recently started running these tests against a
> server that is configured for multi-master replication with another host
> running the same version of 389-ds. 
> 
> After successfully completing more than 700 iterations of the test suite, the 
> tests unexpectedly failed
> with err=11 while doing a a search. The curious thing is that the log
> message reports nentries=1.
> 
> [04/Nov/2019:15:23:50.792301129 -0800] conn=479376 op=2 SRCH 
> base="ou=People,dc=nas,dc=nasa,dc=gov" scope=2 
> filter="(|(uid=testacct)(uid=aftertest))" attrs="1.1"
> [04/Nov/2019:15:23:50.804542570 -0800] conn=479376 op=2 RESULT err=11 tag=101 
> nentries=1 etime=0.0012354224

Looking this up, it looks like err=11 is an administrative limit error, so it's 
likely that the partial-candidate set during index searching was larger than 
your limits allows.

This could be due to the following settings:

https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/html/configuration_command_and_file_reference/database_plug_in_attributes#nsslapd-lookthroughlimit
https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/html/configuration_command_and_file_reference/database_plug_in_attributes#nsslapd_idlistscanlimit

If my memory is correct, lookthroughlimit is how many entries we will 
filter-test in a candidate set (such as a full table scan scenario, or a really 
large query that is not fully indexed), and idlistscanlimit is a limit on how 
large an index list can be (in an attempt to discard large indexes hoping a 
smaller candidate index appears later in the query, essentially a naive form of 
query optimisation). As a result this makes me consider perhaps it's an 
indexing related problem?

It may also be worth checking you have correct indexes for uid= under:

dn: cn=uid,cn=index,cn=userRoot,cn=ldbm database,cn=plugins,cn=config

(Ignore dn: cn=uid,cn=default indexes,cn=config,cn=ldbm 
database,cn=plugins,cn=config as this is a template index definition, and does 
not affect your actual indexing procedures.)

Followed by potentially re-indexing your DB. 

You can always check your indexes are in good states with:

cd /var/lib/dirsrv/slapd-instance/db/<backend name>/
dbscan -f uid.db4 -n -k "=testacct"
dbscan -f uid.db4 -n -k "=aftertest"

Both should have output like:
=testacct        <some integer greater than 0>


Does that help? 


> 
> 
> No error is logged in the error log. This is on RHEL 7.7 with the
> 1.3.9.1-10 RPMs provided by Red Hat.
> 
> 
> -- 
> Iain Morgan
> 
> ----- End forwarded message -----
> 
> -- 
> Iain Morgan
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—
Sincerely,

William Brown

Senior Software Engineer, 389 Directory Server
SUSE Labs
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