Re: [monit] monit fails mysteriously on refresh after upgrade from Debian etch to lenny

[Martin Pala]

Jenny Hopkins wrote:
> 2009/2/25 Martin Pala <address@hidden>:
> > To fix the problem you will need to recompile:
> >
> > 1.) get the source here:
> > http://www.mmonit.com/monit/download/
> >
> > 2.) install bison, flex, libssl-dev
> >
> > 3.) untar monit source distribution
> >
> > 4.) compile:
> >
> > ./configure
> > make
> >
> >
> > Then the "make install" can deploy the monit binary to /usr/local/bin or you
> > can copy it wherever you want. I think debian package tweaks the
> > configuration file name ... the default for monit is monitrc
>
> Hi,
>
> What I hope willl be a final question about this!
> A friend has grabbed the patch from cvs for the divide by 0 memory
> bug, and compiled it into the current debian lenny package for me.
> This seems to have eliminated the problem, and i have monit running
> once again :-)
>
> However, as soon as I try and actually add any processes to monitor
> into my monitrc file, I get an error about process engines.
> I note that
>  Use process engine = False
> is set.
> Please could you tell me if to get this value to True, it has to be
> part of the compile, or a line i would set in a config file somewhere?

Hi,

there could be two reasons:

1.) (less likely) monit was compiled without resource monitoring support 
like this:
./configure --without-resource

2.) (more likely) the initialization of resource monitoring failed ... 
some platforms (including linux) require root privileges to be able to 
for example check per-process memory usage. Monit will continue, but 
disables the resource monitoring which is stated by "Use process engine 
= False"

=> are you running monit as root or non-root?

If you'll start monit with the -vI option, you can see whether the 
resource monitoring initialization failed (it can be displayed ... the 
message will apear most probably before the output with the 
configuration near the monit startup line or bellow the configuration 
output and will most probably look like this:

--8<--
system statistic error -- cannot initialize the process tree => 
process resource monitoring disabled
--8<--

Cheers,
Martin