To get the extra debugging info you would have to shell into the
computer and restart ganglia from the shell with "/etc/init.d/gmon
restart". To restart the master process on the head node, from a
terminal with root privilages type "/etc/init.d/gmetad restart".
I believe you will get debug information in the terminal which started
the process then.
On 6/29/07, Filipe Garrett <[EMAIL PROTECTED]> wrote:
>
> I've been looking into the problem and it looks like the problem is with the
> headnode. i've looked into ganglia and there's just the client node.
> apparently
> ganglia doesn't recognizes the headnode as a node (strange, usually the
> problem
> is with recognizing the clients). During installation I remember setting one
> option for the headnode to be an execution node also. could it be something to
> do with this? where can I check it?
>
> i've set the debugging levels on both files to 10 but there is no new output
> on
> ganglia.err? where is the extra debugging info?
>
> thanks in adv,
> FG
>
> Milo wrote:
> > Since the head node seems to be receiving data fine from the compute node, I
> > don't think the switch not passing multicast packets is the problem. Try
> > turning up the debugging level for gmetad on the head node, and see if the
> > output gives any clues, if nothing else, it will tell you if and from what
> > nodes gmetad is receiving data packets from. To turn on debugging edit your
> > /etc/gmetad.conf file, near the top you should see a variable 'debug_level'
> > which is set to 0 by default. Setting it to above 0 will keep gmetad in the
> > foreground when it is started and spit out debug messages to standard
> > output. You can also do this for the gmond service as well by editing the
> > /etc/gmond.conf file and turning on debugging in the globals{} section at
> > the top.
> > Hopefully that will at least give you an idea of where to start looking for
> > the problem, let us know.
> >
> > -Milo
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On Behalf Of Michael
> > Edwards
> > Sent: Thursday, June 28, 2007 12:50 PM
> > To: oscar-users@lists.sourceforge.net; Bernard Li
> > Subject: Re: [Oscar-users] install on FC5: error in Ganglia
> >
> > We have been getting a fair number of people having problems with
> > ganglia tests failing lately. I have not been able to reproduce the
> > problem myself, so I am not sure where the issue is.
> >
> > Sometimes it breaks because of problems with the /etc/hosts file.
> >
> > Also, what kind of switch are you using? Ganglia likes to (needs to?
> > not sure) use multicast, which is not supported on all switches.
> >
> > On 6/28/07, Filipe Garrett <[EMAIL PROTECTED]> wrote:
> >> Hi all,
> >>
> >> I've managed to pass the other problem. after installing FC5 I updated
> >> everything (with 'yum update') and it was under that configuration that
> >> the installation script was unable to determine the machine's
> > architecture.
> >> I've fresh installed FC5 (1 headnode + 1 client) and everything went
> >> smooth. I got to the test phase and every test passed BUT Ganglia!!! In
> >> the ganglia.err file (pasted below) the client (molevol1.ub.edu) looks
> >> OK and so the problem seems to be with the headnode (molevol.ub.edu)
> >> that does not show up in CLUSTER HOSTS. Since it is a small cluster I've
> >> also set the headnode to an execution host (could this be the problem?).
> >> I've also checked for gmond and it is running in all machines.
> >>
> >> thanks in adv,
> >> FG
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Client nodes: molevol1.ub.edu
> >> Match pattern: molevol.ub.edu|molevol1.ub.edu
> >> Number of hosts matched: 1
> >> Gstat output:
> >> CLUSTER INFORMATION
> >> Name: MolEvol
> >> Hosts: 1
> >> Gexec Hosts: 0
> >> Dead Hosts: 0
> >> Localtime: Thu Jun 28 17:26:44 2007
> >>
> >> CLUSTER HOSTS
> >> Hostname LOAD CPU
> >> Gexec
> >> CPUs (Procs/Total) [ 1, 5, 15min] [ User, Nice, System,
> >> Idle, Wio]
> >>
> >> molevol1.ub.edu
> >> 2 ( 1/ 66) [ 0.00, 0.00, 0.00] [ 2.1, 0.0, 0.8,
> >> 97.1, 0.1] OFF
> >>
> >> The number of nodes expected is different from the number of nodes
> > detected.
> >> Check to see if gmond is running on all your nodes and make sure that you
> >> are not having any network issues.
> >>
> >>
> >>
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