[Samba] Problem with not fixable dangling forward links

Achim Gottinger
Sat, 25 Nov 2017 15:55:47 -0000

Am 25.11.2017 um 04:39 schrieb Andrew Bartlett:
> On Fri, 2017-11-24 at 11:55 +1300, Andrew Bartlett via samba wrote:
>> On Tue, 2017-11-21 at 11:21 +0100, Achim Gottinger via samba wrote:
>>> Hello List,
>>>
>>> In preparation to update my samba ad-dc's running debian wheezy
with
>>> backported samba 4.6.8 to 4.7.3.
>>> I'd like to fix two errors showing up in dbcheck whom hab been
reported
>>> by dbckech --cross-ncs for an long time but without causing any
issues
>>> so far.
>>>
>>> I'm getting this error on my main dc
>>>
>>> root at server:~# samba-tool dbcheck --cross-ncs
>>> Checking 4188 objects
>>> ERROR: no target object found for GUID component for siteList in
object
>>> CN=DEFAULTIPSITELINK,CN=IP,CN=Inter-Site
>>> Transports,CN=Sites,CN=Configuration,DC=samba-list,DC=loc -
>>>
<GUID=d4f41749a1595a43871ab1d72f24fe6b>;<RMD_ADDTIME=130015150890000000>;<RMD_CHANGETIME=130015150890000000>;<RMD_FLAGS=0>;<RMD_INVOCID=af301252bb781543b57dbd7cb773d46f>;<RMD_LOCAL_USN=4762>;<RMD_ORIGINATING_USN=4762>;<RMD_VERSION=0>;CN=Test,CN=Sites,CN=Configuration,DC=samba-list,DC=loc
>>> Not removing dangling forward link
>>> ERROR: no target object found for GUID component for siteList in
object
>>> CN=DEFAULTIPSITELINK,CN=IP,CN=Inter-Site
>>> Transports,CN=Sites,CN=Configuration,DC=samba-list,DC=loc -
>>>
<GUID=596bd8ae9e8bc94eab99ad3c12e22132>;<RMD_ADDTIME=130739077850000000>;<RMD_CHANGETIME=130739077850000000>;<RMD_FLAGS=0>;<RMD_INVOCID=af301252bb781543b57dbd7cb773d46f>;<RMD_LOCAL_USN=453494>;<RMD_ORIGINATING_USN=453494>;<RMD_VERSION=0>;CN=Grafing,CN=Sites,CN=Configuration,DC=samba-list,DC=loc
>>> Not removing dangling forward link
>>> Please use --fix to fix these errors
>>> Checked 4188 objects (2 errors)
>> If these issues don't cause you replication failures or any other
>> issue, then you can ignore them.  In general, don't edit the
backend
>> DB.
>>
>> However we have patches the fix some of this currently under review,
>> which will then be backported.
>>
>> I hope this helps.
> These patches are now in master and I see metze already has a branch
> for 4.7 so I expect those to be backported soon.
>
> Andrew Bartlett
Thank you for the info's Andrew!
I already damaged the sam db onec trying to use ldb edit to remove
deleted objects, thats why asked if in this case an dbcheck --reindex
will fix it.
But since they cause no problems with 4.6 i read your replay as they
will not cause problems on 4.7 as well. So I'll try to update this
weekend and report back.

Achim~