Re: (ITS#5120) slapadd -q makes database logs unusable

[ando@sys-net.it]

hyc@symas.com wrote:
> ando@sys-net.it wrote:
>> hyc@symas.com wrote:
>>> ando@sys-net.it wrote:
>>>> When slapadd'ing -q, existing database log files seem to become unusable.  If
>>>> this is correct, as it seems to be, slapadd could refuse to start with -q if log
>>>> files are present, or, for example, remove the logs if -qq.
>>> I guess we could add that check. The docs already say that if an error occurs, 
>>> the entire database will be unusable. As such, you should only use it for 
>>> initially populating a database, not for adding to an existing one.
>> The story is that I placed logs in a separate directory and I forgot to
>> clean them up when regenerating the DB after removing the database files :)
> 
> Ugh. I don't see how we can reliably detect this case.
> 
> In what way do the logs become unusable? I've tried to reproduce this situation 
> and see no errors of any kind.
> 
> E.g., sh run test001
> rm testrun/db.1.a/{alock,*db*}
> ../servers/slapd/slapadd -q -f testrun/slapd.1.conf -l testdata/test-ordered.ldif
>     (the above works fine)
> ../servers/slapd/slapd -f testrun/slapd.1.conf ...
>     (works fine)
> 
> db_stat -h testrun/db.1.a -l
> 
> (no complaints there either)

Initially, I thought your check was not much representative, since 
test001 doesn't do any writes.  In my original case, I forgot to mention 
that DB_LOG_AUTOREMOVE was set.  So I tried that configuration and 
manually ran the load of test008, resulting in creating multiple logs, 
part of which were removed.  Then I ran the commands you suggested 
above, but nothing happened, so I'm at a loss.  In fact, old log files 
were immediately removed by slapd itself, and log files numbering 
correctly restarted from where it left.

Probably I was chasing a red herring.  p.



Ing. Pierangelo Masarati
OpenLDAP Core Team

SysNet s.r.l.
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