dbus daemon/messagebus 100% CPU usage

[Jordan Erickson]

Looks like you can add the line "ulimit -n 65535" to /etc/default/dbus

... :)

https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/381063/comments/4


Cheers,
Jordan


David Hopkins wrote:
> It appears that the issue is related to this bug:
> 
> https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/381063
> 
> So, how do I set ulimit -n 8192
> 
> for example to increase the open files limit?  Do I need to edit the
> /etc/init/dbus.conf file and add this command somewhere? Or is there
> some other location that I can make certain that the limit is changed
> from 1024 to a larger number?
> 
> I would think this bug would affect more than just me as it seems to
> be an issue for ltsp in general.
> 
> Sincerely,
> Dave Hopkins
> 
> 
> On Thu, Sep 16, 2010 at 1:42 PM, David Hopkins <dahopkins429 at gmail.com> wrote:
>> Jordan,
>>
>> Thanks for the link but I don't think it is that issue as I'm not
>> getting error messages in the log files.  Running dpkg
>> --get-selections shows that the two systems have exactly the same
>> packages installed.  I have between 40 and 50 users logged onto the
>> server at any given time.  It is rather random as the system can run
>> fine for a day or so and then suddenly have this issue.
>>
>> I have already rebuilt the server once a few weeks ago. That was when
>> I made certain that is was a 'clone' of the other server.  I used the
>> --get-selections and --set-selections to ensure that apt installed
>> only those packages.
>>
>> The only clue I have at present is that npviewer.bin (flash?) will
>> segfault at times though the system doesn't misbehave when this
>> happens. It is probably just one line in a log file that I haven't
>> located which the clue I need, but if I can't resolve it quickly, I'll
>> probably have to try upgrading the systems to Lucid (10.04) although
>> from some traffic on the lists, it seems lucid comes with its own set
>> of issues.
>>
>> Thanks!
>> Dave ...
>>
>> On Thu, Sep 16, 2010 at 11:24 AM, Jordan Erickson
>> <jerickson at logicalnetworking.net> wrote:
>>> Hi David,
>>>
>>> If 1 of 2 servers is experiencing this issue, and nobody else has chimed
>>> in yet to say they're having the same problem, I'd have to assume it's
>>> something very particular to your one server's setup.. A couple of
>>> questions:
>>>
>>> - Is this happening with specific users, only before/after login, ...?
>>> - Have you checked logs on the terminals themselves?
>>> - Just a shot in the dark (google in the dark?) but have you seen
>>> comments 11 & 12 at
>>> https://bugs.launchpad.net/debian/+source/pulseaudio/+bug/390528 ?
>>>
>>> I'm sure there's a solution to your problem. The important thing IMHO is
>>> to do as much research on your issue as possible and not let the school
>>> director think that it's unsolvable. Worst case scenario you could
>>> always wipe/re-install the system. Going back to an unsupported LTSP 4.2
>>> probably isn't your best option.
>>>
>>>
>>> Cheers,
>>> Jordan
>>>
>>>
>>> On 09/16/2010 05:12 AM, David Hopkins wrote:
>>>> I am still having issues with the dbus-daemon randomly consuming 100%
>>>> of the cpu on my servers which renders them unusable.  There doesn't
>>>> appear to be any messages in the logs but the school director has now
>>>> stopped by and asked if it wouldn't be simpler to go back to the RHEL5
>>>> with LTSP4.2 instead of staying with Ubuntu.  He is very supportive of
>>>> using LTSP and for him to ask this is a serious concern.
>>>>
>>>> Does anyone have any ideas about why the dbus-daemon would suddenly
>>>> spike to 100% cpu usage and hang the system?  The load average can be
>>>> very low (4-5 on a dual-quad) and yet the system is completely
>>>> nonresponsive?
>>>>
>>>> Sincerely,
>>>> Dave Hopkins
>>>>
>>>>
>>>> On Thu, Sep 9, 2010 at 3:01 PM, David Hopkins <dahopkins429 at gmail.com> wrote:
>>>>> Has anyone noticed dbus (messagebus) using 100% of a CPU on an LTSP
>>>>> server?  I have two identical servers both hardware and software
>>>>> (Karmic 9.10, comparing output from dpkg --get-selections). However,
>>>>> one server runs flawlessly, the other shows dbus_daemon using 100% of
>>>>> a CPU. Also, memory usage slowly climbs until the system begins using
>>>>> virtual memory and everything then comes to a halt.  Both systems
>>>>> connect to the same brand of switch, both connect to a KVM.  The only
>>>>> differences are in the client systems that they serve. One servers
>>>>> GX150/GX240s while the other (the misbehaving system) serves
>>>>> GX50/GX110/GX150's.  I'm in the process of replacing the GX50 systems
>>>>> and as many GX110's as possible, but curious if anyone has noticed
>>>>> this issue.
>>>>>
>>>>> Sincerely,
>>>>> Dave Hopkins
>>>>> Newark Charter School
>>>>> Newark Delaware
>>>>>
>>>
>>> --
>>> Jordan Erickson - LNS
>>> (707) 636-5678  - http://logicalnetworking.net
>>>
>>> --
>>> edubuntu-users mailing list
>>> edubuntu-users at lists.ubuntu.com
>>> Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
>>>


-- 
Jordan Erickson - LNS
(707) 636-5678  - http://logicalnetworking.net