dbus daemon/messagebus 100% CPU usage

[David Hopkins]

I tried this but not sure how to tell if it actually set nofiles for
dbus to the desired value.  A shell still reports 1024 as the value
though that is just for that user and not for messagebus or
dbus-daemon?

On Fri, Sep 17, 2010 at 6:20 PM, Jordan Erickson
<jerickson at logicalnetworking.net> wrote:
> 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
>>>>
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>>>>
>
>
> --
> Jordan Erickson - LNS
> (707) 636-5678  - http://logicalnetworking.net
>
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