Bug 11025 - Process using 100% CPU - winbind_server
Process using 100% CPU - winbind_server
Status: NEW
Product: Samba 4.1 and newer
Classification: Unclassified
Component: Winbind
4.1.14
x64 Linux
: P5 critical
: ---
Assigned To: Samba QA Contact
Samba QA Contact
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2014-12-30 11:41 UTC by BAndrade
Modified: 2015-03-05 07:19 UTC (History)
3 users (show)

See Also:


Attachments
Strace -ff -p (6.47 KB, text/plain)
2014-12-30 11:41 UTC, BAndrade
no flags Details
Sysdig "proc.pid=" output (28.62 KB, text/plain)
2014-12-30 11:42 UTC, BAndrade
no flags Details

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Description BAndrade 2014-12-30 11:41:11 UTC
Created attachment 10568 [details]
Strace -ff -p

I have a multi-DC domain.

I had serner-samba 4.1.6 installed and updated to 4.1.14, but the problem continues.

After I start samba, a process starts consuming almost 100% CPU and via 'samba-tool processes' I found that this process is winbind-server.

I attached the strace and sysdig of the process.

Also, I found this open bug... should be a similar problem - https://bugzilla.samba.org/show_bug.cgi?id=10714
Comment 1 BAndrade 2014-12-30 11:42:20 UTC
Created attachment 10569 [details]
Sysdig "proc.pid=" output
Comment 2 Richard Sharpe 2014-12-30 20:29:02 UTC
Is this still happening?

See this bug for one like this that has already been fixed:

https://bugzilla.samba.org/show_bug.cgi?id=10358
Comment 3 BAndrade 2014-12-30 21:02:09 UTC
That bug was already corrected in samba 4.1.14, the version I have installed.

That problem persists.
Comment 4 BAndrade 2014-12-30 21:03:13 UTC
Sorry, my problem persists. Don't now if it's directly related to that bug, but I have the latest samba version installed
Comment 5 Richard Sharpe 2014-12-30 21:26:51 UTC
Can you attach to the offending process with GDB and get us a traceback?
Comment 6 BAndrade 2014-12-31 12:58:06 UTC
We're using the Domain Controller as file server. Today we're are testing running another host as domain member and file server. Later today, I'll inform in here the results and if improved the performance and decreases the CPU usage.
Comment 7 BAndrade 2015-01-05 10:34:10 UTC
Hey,

After configuring a file server in another machine, the problem is solved.

As said on samba4 wiki, it's not recommended using Domain Controller as file server because samba internal winbind, and we verified that the hard way.

Regards,
Bruno Andrade.
Comment 8 Dron 2015-03-05 07:19:13 UTC
Hello.
Anyway this is not normal.
I am testing Samba 4.1.17 on Freebsd 10.1 amd64.
I have 100% CPU usage by samba process even on compiled programm install, when winbind enabled in nssswitch.conf