event broker -> SQL questions

[Titus Anderson]

Hmmm...  Well, HOST_STATUS events get triggered in the update_host_status
function.  It appears that if a host enters or leaves a soft error state,
update_host_status will be called twice from the check_host function; once in
the block that handles the error or recovery and again because it's always
called whenever check_host is called.  That could explain the duplicate events.

--Titus

--- Ben <bench at silentmedia.com> wrote:

> Thanks for these so far. 
> 
> I've noticed that using your example NEB module, occasionally there are
> duplicate HOST_STATUS events. Maybe identical events are supposed to be
> generated by the event broker and dispatched at the same time, but I don't
> know why that would be. Has anybody else seen this, and is it a bug?
> 
> On Wed, 13 Oct 2004, Titus Anderson wrote:
> 
> > > So I'm looking into how to turn event broker events into SQL statements,
> > > and I have some questions about the following fields found in both
> > > HOST_STATUS and SERVICE_STATUS events. I'm hoping somebody else has
> > > already digested the code and can clear up my confusion. :)
> > > 
> > > modified_attributes appears to be redundant, because there are other
> > > fields for the flags it is used to carry (active_checks_enabled,
> > > notifications_enabled, etc.). Or maybe it's that those other fields are
> > > redundant? Or maybe I'm just missing something?
> > 
> > Well, this part is easy to answer, just glancing through the code.  It
> appears
> > that the flags are set (but never cleared) whenever an external command
> alters
> > a field of a host or service.  For example, when you execute a
> > CHANGE_NORMAL_HOST_CHECK_INTERVAL command via the external commands file,
> the
> > MODATTR_NORMAL_CHECK_INTERVAL flag is set in the modified_attributes field
> for
> > that host.
> > 
> > The rest is somewhat guesses, but here goes:
> > 
> > > When are these filled out, and with what?
> > > event_handler - the event handler for this host or service; set at
> startup
> > > performance_data - most recent performance data from a check; set with
> each
> > check
> > > problem_has_been_acknowledged - true or false; set if a problem has been
> > acknowledged;  I presume it is cleared when the problem goes away
> > > acknowledgement_type - either ACKNOWLEDGEMENT_STICKY or
> > ACKNOWLEDGEMENT_NORMAL; also set when the problem is acknowledged;  don't
> know
> > what the default value is, though
> > 
> > No ideas on the rest.  Haven't dug that deep yet.
> >  
> > > What is the logic behind these values?
> > > has_been_checked
> > > should_be_scheduled
> > > current_notification_number
> > > 
> > > What are these good for?
> > > failure_prediction_enabled
> > > percent_state_change
> > > scheduled_downtime_depth
> > 
> > 
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