[SSSD] IPA client randomly lose memory of users

Qing Chang qchang at sri.utoronto.ca
Mon Dec 3 20:42:30 UTC 2012


On 03/12/2012 10:12 AM, Dmitri Pal wrote:
> On 12/02/2012 11:37 AM, Jakub Hrozek wrote:
>> On Sat, Dec 01, 2012 at 10:01:55PM -0500, Qing Chang wrote:
>>> On 30/11/2012 7:30 PM, Dmitri Pal wrote:
>>>> On 11/30/2012 05:21 PM, Qing Chang wrote:
>>>>> my dovecot IMAP server would randomly lose memory of users, as an
>>>>> example:
>>>>>
>>>>> Samba/NFS server knows this user:
>>>>> [root at smb2 shassan]# getent passwd bqiang
>>>>> bqiang:*:47105:471:Beiping Qiang:/home2/bqiang:/bin/tcsh
>>>>>
>>>>> But dovecot server does not:
>>>>> [root at dovecot2 ~]# getent passwd bqiang
>>>>>
>>>>> Only when I apply this:
>>>>> [root at dovecot2 ~]# \rm /var/lib/sss/db/cache_sri.utoronto.ca.ldb
>>>>> [root at dovecot2 ~]# service sssd restart
>>>>>
>>>>> It gets it:
>>>>> [root at dovecot2 ~]# getent passwd bqiang
>>>>> bqiang:*:47105:471:Beiping Qiang:/home2/bqiang:/bin/tcsh
>>>>>
>>>>> So far I have to deal with this for three users. It's quite possible
>>>>> that there are more than 3 that are affected, they were just patient
>>>>> enough to wait until dovecot "recovers its memory".
>>>>>
>>>>> =====
>>>>> sssd.x86_64                      1.8.0-32.el6
>>>>> @rhel-x86_64-server-6
>>>>> sssd-client.x86_64               1.8.0-32.el6
>>>>> @rhel-x86_64-server-6
>>>>> =====
>>>>>
>>>>> Your help is much appreciated.
>>>>>
>>>>> Thanks,
>>>>> Qing
>>>>>
>>>> Can it be because hierarchy changes in some way?
>>> I assume this is not a question for me? Please explain if it is, I do not have a clue what this is.
>> I think that Dmitri was asking if the group membreships may have changed
>> on the server between the two lookups. In other words, was the user
>> added to or removed from some groups on the server?
> Correct but not only this.
> Have the nesting of the groups the user is in changed in any way?
> For example a group was moved from one parent group to another.
I am no using nested groups.

It happened to one of the three users today, I was putting in change for increasing
log level, by doing "service sssd restart", like Simo suspected, that along brought
back the memory:-( But I have to wait for another occurrence to catch the bug in
action...

Will report back.

Thanks,
Qing
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