[Samba] Winbindd (tdb_chainlock_with_timeout_internal: alarm (40) timed out for key)

[Amit Kumar]

Hey Rowland,

I wanted to ask

a. What is mutex.tdb, what is its purpose?

b. why "mutex grab failed" started appearing in messages, what can be
the probable reasons?

Is pre-authentication failed related to locking failure of mutex.tdb?


Dec 15 12:49:52 abc winbindd[30467]: [2018/12/15 12:49:52.764924, 0]
../source3/libsmb/cliconnect.c:1921(cli_session_setup_spnego_send)

Dec 15 12:49:52 abc winbindd[30467]: Kinit for ABC$@TYP.ORG
<mailto:AKLRHEMPDP001$@ENTERPRISENET.ORG> to access
cifs/xyz.fgb.net at xyz.NET
<mailto:cifs/CVGWINDOMP011.securityroot.net at SECURITYROOT.NET> failed:
Preauthentication failed

......

Dec 15 08:57:44 abc winbindd[24723]: [2018/12/15 08:57:44.716485, 0]
./source3/lib/util_tdb.c:493(tdb_chainlock_with_timeout_internal)

Dec 15 08:57:44 abc winbindd[24723]:
tdb_chainlock_with_timeout_internal: alarm (40) timed out for key
ABC.typ.org <http://aklwindomp001.enterprisenet.org/> in tdb
/var/lib/samba/mutex.tdb

Dec 15 08:57:44 abc winbindd[24723]: [2018/12/15 08:57:44.716827, 0]
../source3/winbindd/winbindd_cm.c:918(cm_prepare_connection)

Dec 15 08:57:44 abc winbindd[24723]: cm_prepare_connection: mutex grab
failed for ABC.typ.org <http://aklwindomp001.enterprisenet.org/>

Thanks
Amit

On 12/19/2018 01:23 PM, Rowland Penny via samba wrote:
> On Wed, 19 Dec 2018 12:32:45 +0530
> Amit Kumar via samba <samba at lists.samba.org> wrote:
>
>> Hey,
>>
>> But What's the reason of this error?
>>
> I do not know, but what I do know is that, if it is a bug, you will
> never get it fixed in Samba 4.2.x, this version is EOL. It might also
> have been fixed in a later version.
>
> Sorry if this isn't what you want to hear.
>
> Rowland
>