[Samba] ldb errors after upgrade, cause?

[Roel van Meer]

L.P.H. van Belle via samba writes:

> Is samba-dsdb-modules installed ?

Yes, I checked again, and all packages are installed, all of them with the  
proper version, and no leftovers.

This server works fine for a half a day, and then these errors happen, so I  
think it's unlikely that it's related to the install itself.

I have already made a backup of all tdb files with tdbbackup and restored  
them afterwards, to try and fix any corruption if that would be the case,  
but unfortunately that didn't help.

This server isn't particularly large (3738 objects in the entire SAM  
database). I'm quite sure we're not reaching the max open files limit (16k),  
but that leaves me fresh out of ideas :)

Thanks a lot,

Roel

---/---
ii  libtevent0:amd64            0.9.37-1
ii  libwbclient0:amd64          2:4.9.5+dfsg-5+deb10u1
ii  python-ldb                  2:1.5.1+really1.4.6-3
ii  python-mysqldb              1.3.10-2
ii  python-samba                2:4.9.5+dfsg-5+deb10u1
ii  python-talloc:amd64         2.1.14-2
ii  python-tdb                  1.3.16-2+b1
ii  samba                       2:4.9.5+dfsg-5+deb10u1
ii  samba-common                2:4.9.5+dfsg-5+deb10u1
ii  samba-common-bin            2:4.9.5+dfsg-5+deb10u1
ii  samba-dsdb-modules:amd64    2:4.9.5+dfsg-5+deb10u1
ii  samba-libs:amd64            2:4.9.5+dfsg-5+deb10u1
ii  samba-vfs-modules:amd64     2:4.9.5+dfsg-5+deb10u1
ii  tdb-tools                   1.3.16-2+b1
ii  winbind                     2:4.9.5+dfsg-5+deb10u1
---/---




> Run : dpkg -l | egrep "samba|winbind|ldb|tdb|tevent|talloc"
> That shows it.
>
> Can you try also to run : apt dist-upgrade --autoremove
> Most probley there are some leftovers from the dist upgrade,
> You can find these with : dpkg -l |egrep "deb[8-9]|jessie|stretch| 
> debian[8-9]"
> As far i can remember your just missing a package, its something simple but  
> simple overlooked.
>
>
> Greetz,
>
> Louis
>
>
> > -----Oorspronkelijk bericht-----
> > Van: samba [mailto:samba-bounces at lists.samba.org] Namens Roel
> > van Meer via samba
> > Verzonden: woensdag 5 februari 2020 20:03
> > Aan: samba at lists.samba.org
> > Onderwerp: [Samba] ldb errors after upgrade, cause?
> >
> > Hi!
> >
> > recently we upgraded a Debian jessie server to Debian buster,
> > with Samba
> > being upgraded from 4.5.12 (+dfsg-2+deb9u3) to 4.9.5
> > (+dfsg-5+deb10u1).
> >
> > A few hours later we saw these errors in syslog:
> >
> >     smbd[26024]: [2020/02/03 11:13:13.631613,  0]
> > ../lib/ldb-samba/ldb_wrap.c:79(ldb_wrap_debug)
> >     smbd[26024]:   ldb: Failure during ltdb_lock_read():
> > Locking error ??? Busy
> >     smbd[26024]: [2020/02/03 11:13:13.631762,  0]
> > ../lib/ldb-samba/ldb_wrap.c:79(ldb_wrap_debug)
> >     smbd[26024]:   ldb: module samba_dsdb initialization
> > failed : Operations error
> >     smbd[26024]: [2020/02/03 11:13:13.631828,  0]
> > ../lib/ldb-samba/ldb_wrap.c:79(ldb_wrap_debug)
> >     smbd[26024]:   ldb: Unable to load modules for
> > /var/lib/samba/private/sam.ldb: Unable to load ltdb cache
> > records for backend 'ldb_tdb backend'
> >
> > I was wondering if someone knows in which area we have to
> > find a solution.
> > Is this resource exhaustion? Or database corruption? Something else?
> > I did run "samba-tool dbcheck --cross-ncs" afterwards, and
> > this fixed some
> > errors, but I'm not sure if that can be related to the ldb errors.
> >
> > Just wondering if this rings a bell for anyone, with maybe
> > some tips on how
> > to proceed from here.
> >
> > Thanks!
> >
> > Roel
> >
> > --
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> >
> >
>
>
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