On 07/17/2017 02:53 AM, William Brown wrote:
On Sun, 2017-07-16 at 19:49 +0000, tdarby(a)email.arizona.edu wrote:
>> Which version of 389-ds-base do you have configured?
> I'm running on RHEL 6.9
> In the errors log, it shows 389-Directory/188.8.131.52 B2015.345.187
> The RPM for it is 389-ds-base-184.108.40.206-69.el6_7.x86_64 is the RPM
I'll need to check with the team, but I do not believe we are supporting
this version any more. We have some newer 1.2.x series release, but we
won't backport fixes to anything in this series (even if we find the
>> Sorry, there is no way to see which index it is easily. It looks like a
>> substring index, but you likely need to correlate this to an access log
>> that made a query of "*zon".
> I searched all the access logs there and couldn't find a string matching *zon.
Subsequently, another identical error message showed up for the string "*urs". I
was not able to find that in the access logs either.
> So, I started doing dbscans on the indexes and eventually found two that are most
likely the culprits, cn.db4 and ismemberof.db4. In the dbscans for these I found the
> *urs 403595
> *zon 409451
> *urs 403926
> *zon 666628
> Are you saying then that I may not actually have a corrupt index?
Correct. I think the issue is we don't have enough space to read in your
index during a search process. I suspect it's the later index, for
ismemberof. I'll see if I can reproduce this on my system.
For now a solution *could* be to remove substr on ismember of and cn,
and allow the other indexes to be searched. It would be good to see the
queries that cause the issue because that could help me advise better on
if this is an adquete temporary work around.
the buffer cannot really be to small,
in c_get(... DB_MULTIPLE) we
provide the buffer and its size and the buffer will be filled by the bdb
functions. Since in a substring index our key always has a size of 4 and
the data is an ID with size 4 always at least one key/data pair will fit.
But there are two issues, the BUFFER_SMALL was on one server and the
*zon error on the other. And it explicitely said that the data size was
5 instead of the expected 4, so this indicates that there is really
someting broken in that index.
I would suggest to combine your and Mark's proposal: remove the
substring index and reindex the database
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