Bug 11962 - tdb_chainlock_with_timeout_internal: alarm (40) timed out for key mutex.db
tdb_chainlock_with_timeout_internal: alarm (40) timed out for key mutex.db
Status: RESOLVED WORKSFORME
Product: Samba 4.1 and newer
Classification: Unclassified
Component: Other
4.4.4
x64 Linux
: P5 normal
: ---
Assigned To: Andrew Bartlett
Samba QA Contact
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2016-06-10 16:53 UTC by trenta
Modified: 2016-08-09 10:46 UTC (History)
0 users

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Description trenta 2016-06-10 16:53:23 UTC
Hi,

We have detected this error in samba 4.4.4


# cat /usr/local/samba/var/log.winbindd-idmap
[2016/06/09 12:06:53.547280,  0]
../source3/lib/util_tdb.c:494(tdb_chainlock_with_timeout_internal)
  tdb_chainlock_with_timeout_internal: alarm (40) timed out for key
dc.domain.com in tdb /usr/local/samba/var/lock/mutex.tdb
[2016/06/09 12:06:53.547469,  0]
../source3/winbindd/winbindd_cm.c:1032(cm_prepare_connection)
  cm_prepare_connection: mutex grab failed for dc.domain.com
[2016/06/09 12:07:33.578631,  0]
../source3/lib/util_tdb.c:494(tdb_chainlock_with_timeout_internal)
  tdb_chainlock_with_timeout_internal: alarm (40) timed out for key
dc.domain.com in tdb /usr/local/samba/var/lock/mutex.tdb
[2016/06/09 12:07:33.578896,  0]
../source3/winbindd/winbindd_cm.c:1032(cm_prepare_connection)
  cm_prepare_connection: mutex grab failed for dc.domain.com
[2016/06/09 12:09:48.079144,  0]
../source3/lib/util_tdb.c:494(tdb_chainlock_with_timeout_internal)
  tdb_chainlock_with_timeout_internal: alarm (40) timed out for key
dc.domain.com in tdb /usr/local/samba/var/lock/mutex.tdb
[2016/06/09 12:09:48.079316,  0]
../source3/winbindd/winbindd_cm.c:1032(cm_prepare_connection)
  cm_prepare_connection: mutex grab failed for dc.domain.com


I have tried in a new domain provisioned and in this cas mutex.tdb doesn't exist

Another test is during upgrade samba 3 to samba 4 AD, in this case mutex.tdb, exist with old timestamp but same error described appears in log

Is this correct?

Reproduced compile samba 4.4.4 from sources 
./configure
make
make install

provision new domain 
start domain 
and view logs

Thanks
Comment 1 trenta 2016-06-10 18:11:16 UTC
With a new provisiones domain (not migrated form samba3) 
mutex.tdb doesn't exist

What is mutex.tdb?
Comment 2 trenta 2016-08-09 10:46:45 UTC
migrated from samba 3 to samba 4 AD, without whit files, It seems that is not needed or now works without this...