dbus daemon/messagebus 100% CPU usage

[David Hopkins]

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
>