[Nagios-devel] Only first instance of a NEB module receives data in nagios 2.6.

[<rou...@cs...>]

Hello:

I have the following two lines in nagios.cfg (lines split for
readability):

  broker_module=/usr/lib/nagios/modules/ext_corr.o --file /tmp/sampler.2
     --tag module2 --control ops01;ZSecControl

  broker_module=/usr/lib/nagios/modules/ext_corr.o --file /tmp/sampler
     --tag module1 --control ops01;ZSecControl

This is meant to create two identical feeds of data from the module.

However only the first one seems to generate output.

In the case above, only the file /tmp/sampler (module1) receives
events. /tmp/sampler doesn't get any output. If I reverse the order of
the entries, then /tmp/sampler is the only file to receive output from
the module.

The log messages:

  [1167001096] Nagios 2.6 starting... (PID=17742)
  [1167001096] LOG VERSION: 2.0
  [1167001096] ext_corr: module loading for --file /tmp/sampler
     --tag module1 --control ops01;ZSecControl: $Id$ - uses open
  [1167001096] Event broker module '/usr/lib/nagios/modules/ext_corr.o'
     initialized successfully.
  [1167001096] ext_corr: module loading for --file /tmp/sampler.2
     --tag module2 --control ops01;ZSecControl: $Id$ - uses open
  [1167001096] Event broker module '/usr/lib/nagios/modules/ext_corr.o'
     initialized successfully.

seem to indicate that both are properly loaded and initalized. However
the funny part is that they are loaded in the reverse order from that
specified in the config file.

I added the following code to the beginning of
ext_corr.o:processCallback():

    snprintf(temp_buffer,sizeof(temp_buffer)-1,"ext_corr[%s]: callback activate\
d\n", tag);
    temp_buffer[sizeof(temp_buffer)-1]='\x0';
    write_to_all_logs(temp_buffer,NSLOG_INFO_MESSAGE);

and this reports that only the module2 instance is receiving
events/being called.

Is there some reason that multiple instances of a module can't
register? Also attempting to shut down nagios hangs and it has to be
given a kill -9 to exit.

Hmm, on further investigation I can copy ext_corr.o to ext_corr1.o and
change the broker_module lines above and get output to both module1
and module2. Also the debugging code shows both modules are being
called (as expected) and exiting nagios no longer hangs.

So is this intentional? If so it is documented anywhere?

This is with nagios 2.6 plus a couple of patches that add the event
type that the modules register for.

				-- rouilj
John Rouillard
===========================================================================
My employers don't acknowledge my existence much less my opinions.