[Samba] samba_dlz: ldb: Unable to load modules

[Heinz Hölzl]

hi,

the problem is really lmdb on a btrfs.


 with xfs underneath it runs as it should


Heinz



Am Mittwoch, dem 12.02.2025 um 10:59 +0000 schrieb Heinz Hölzl via
samba:
> 
> I have just seen:
> 
> on the servers where lmdb works there is /usr/local/samba/bind-
> dns/dns/sam.ldb.d/CN=CONFIGURATION,DC=XXX,DC=NET.ldb-lock
> 
> 
> on the servers where it does not work the ldb-lock file is missing. 
> 
> the only other difference I notice is that the working servers have
> xfs
> as filesystem, the others have btrfs
> 
> 
> 
>     
>     database "dlopen /usr/local/samba/lib/bind9/dlz_bind9_18.so -d5";
> 
> with a debuglevel 5 i got in syslog:
> 
> 
> med[2389]: samba_dlz: ldb: ../../lib/ldb/ldb_mdb/ldb_mdb.c:419: MDB
> corrupted for key [ DN=@BASEINFO]
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz:
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz: ldb: Failed to
> connect
> to 'mdb:///usr/local/samba/bind-
> dns/dns/sam.ldb.d/CN=CONFIGURATION,DC=HH,DC=NET.ldb' with backend
> 'mdb': Unable to load ltdb cache records for backend 'ldb_mdb
> backend'
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz: ldb: module
> samba_dsdb
> initialization failed : Operations error
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz: ldb: Unable to load
> modules for /usr/local/samba/bind-dns/dns/sam.ldb: Unable to load
> ltdb
> cache records for backend 'ldb_mdb backend'
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz: Failed to connect to
> Failed to connect to /usr/local/samba/bind-dns/dns/sam.ldb: Unable to
> load ltdb cache records for backend 'ldb_mdb backend': Operations
> error
> Feb 12 11:30:26 probe28 named[2389]: samba_dlz: FAILED dlz_create
> call
> result=25 #refs=0
> Feb 12 11:30:26 probe28 named[2389]: dlz_dlopen of 'AD DNS Zone'
> failed
> Feb 12 11:30:26 probe28 named[2389]: SDLZ driver failed to load.
> Feb 12 11:30:26 probe28 named[2389]: DLZ driver failed to load.
> Feb 12 11:30:26 probe28 named[2389]: loading configuration: failure
> Feb 12 11:30:26 probe28 named[2389]: exiting (due to fatal error)
> 
> 
> regards,
> heinz
> 
> > Hi,
> > 
> > I am trying to convert my DC to lmdb.
> > and do the following:
> > 
> > samba-tool domain join gvcc.net DC --realm=XXX.NET --server=dc6 --
> > dns-
> > backend=BIND9_DLZ --backend-store=mdb --backend-store-size=8Gb -
> > Uadministrator
> > 
> > 
> > It worked on the first two servers dc5 and dc6.
> > 
> > Now I try it on dc4, but here I get the following errors in the
> > syslog:
> > 
> > Feb 11 18:08:45 dc4 named[29841]: Loading 'AD DNS Zone' using
> > driver
> > dlopen
> > Feb 11 18:08:45 dc4 named[29841]: samba_dlz: ldb: module samba_dsdb
> > initialization failed : Operations error
> > Feb 11 18:08:45 dc4 named[29841]: samba_dlz: ldb: Unable to load
> > modules for /usr/local/samba/bind-dns/dns/sam.ldb: Unable to load
> > ltdb
> > cache records for backend 'ldb_mdb backend'
> > Feb 11 18:08:45 dc4 named[29841]: samba_dlz: Failed to connect to
> > Failed to connect to /usr/local/samba/bind-dns/dns/sam.ldb: Unable
> > to
> > load ltdb cache records for backend 'ldb_mdb backend': Operations
> > error
> > Feb 11 18:08:45 dc4 named[29841]: samba_dlz: FAILED dlz_create call
> > result=25 #refs=0
> > Feb 11 18:08:45 dc4 named[29841]: dlz_dlopen of 'AD DNS Zone'
> > failed
> > Feb 11 18:08:45 dc4 named[29841]: SDLZ driver failed to load.
> > Feb 11 18:08:45 dc4 named[29841]: DLZ driver failed to load.
> > Feb 11 18:08:45 dc4 named[29841]: loading configuration: failure
> > Feb 11 18:08:45 dc4 named[29841]: exiting (due to fatal error)
> > 
> > all servers run on debian 12.9
> > 
> > 
> > i have not found any difference between the servers, where else can
> > i
> > look?
> > 
> > 
> > thanks
> > 
> > 
> > regards,
> > 
> > heinz
>