[SSSD] IPA client randomly lose memory of users

Qing Chang qchang at sri.utoronto.ca
Thu Dec 6 18:49:14 UTC 2012


On 06/12/2012 12:12 PM, Jakub Hrozek wrote:
> On Thu, Dec 06, 2012 at 11:37:41AM -0500, Qing Chang wrote:
>> On 05/12/2012 2:58 PM, Dmitri Pal wrote:
>>> On 12/05/2012 02:00 PM, Qing Chang wrote:
>>>> On 05/12/2012 12:59 PM, Simo Sorce wrote:
>>>>> On Wed, 2012-12-05 at 11:31 -0500, Qing Chang wrote:
>>>>>
>>>>> I see this:
>>>>>
>>>>>> First failed "getent passwd shassan" triggers:
>>>>>> (Wed Dec  5 10:45:05 2012) [sssd[nss]] [nss_cmd_getpwnam_dp_callback]
>>>>>> (0x0040): Unable to get
>>>>>> information from Data Provider
>>>>>> Error: 1, 11, Fast reply - offline
>>>>>> Will try to return what we have in cache
>>>>> but later on you report only logs after 10:45:05.
>>>>>
>>>>> It would be useful to see what happened in the provider immediately
>>>>> before the error was returned. In particular I would like to see what
>>>>> error caused the provider to go offline and if it mentions removing the
>>>>> user in any way.
>>>> the problem is we don't know when the loss of memory happened and it
>>>> appears to
>>>> me that nothing is logged about it. If you don't mind, I can send in
>>>> more logs.
>>>>>> (Wed Dec  5 10:45:48 2012) [sssd[be[sri.utoronto.ca]]]
>>>>>> [sdap_save_user] (0x0400): Storing info for
>>>>>> user shassan
>>>>>> (Wed Dec  5 10:45:48 2012) [sssd[be[sri.utoronto.ca]]]
>>>>>> [sysdb_search_user_by_name] (0x0400): No such
>>>>>> entry
>>>>>> (Wed Dec  5 10:45:48 2012) [sssd[be[sri.utoronto.ca]]]
>>>>>> [sysdb_add_user] (0x0400): Error: 17 (File
>>>>>> exists)
>>>>>> (Wed Dec  5 10:45:48 2012) [sssd[be[sri.utoronto.ca]]]
>>>>>> [sysdb_store_user] (0x0080): A user with the
>>>>>> same UID [54184] was removed from the cache
>>>>>> (Wed Dec  5 10:45:48 2012) [sssd[be[sri.utoronto.ca]]]
>>>>>> [sysdb_search_user_by_uid] (0x0400): No such
>>>>>> entry
>>>>> This is interesting, do you have duplicated UIDs in your directory by
>>>>> chance ?
>>>> That was also what I was wondering about, but that's her id, it is
>>>> unique.
>>> Can you compare the LDAP entry of this user to couple other users that
>>> are OK, use SSSD regularly and do not have an issue?
>>> May be there is something else in the user entry that would shed the light.
>> there is nothing different after comparing with a few accounts. The cmd line I used
>> is this:
>> ldapsearch -LL -x -D 'cn=Directory Manager' -W -b 'dc=sri,dc=utoronto,dc=ca' '(uid=shassan)'
>>
>> Could there be still something not showing by this cmd?
> The term "uid" is kind of overloaded here. We're looking for non-unique
> UID numbers, not the uid LDAP attributes, which store the name.
>
> Something like this might show the offender:
> ldapsearch -LL -x -D 'cn=Directory Manager' -W -b 'dc=sri,dc=utoronto,dc=ca' '(uidNumber=54184)'
Thanks Jakub, there is a conflict uidNumber indeed.

What I tried was "getent passwd 54184", it gave me just one entry which got me to believe
that it is unique...

Thank you all for your time and wisdom.

Qing
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