Bug 11962 - tdb_chainlock_with_timeout_internal: alarm (40) timed out for key mutex.db
Summary: tdb_chainlock_with_timeout_internal: alarm (40) timed out for key mutex.db
Status: RESOLVED WORKSFORME
Alias: None
Product: Samba 4.1 and newer
Classification: Unclassified
Component: Other (show other bugs)
Version: 4.4.4
Hardware: x64 Linux
: P5 normal (vote)
Target Milestone: ---
Assignee: Andrew Bartlett
QA Contact: Samba QA Contact
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-06-10 16:53 UTC by trenta
Modified: 2016-08-09 10:46 UTC (History)
0 users

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
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...