unknown_limit not working

[Marki]

Using munin 1.4.5-3~bpo50+1 on debian lenny, with rrd files from older munin (2-4 years) - don't know if that matters. After upgrade I receive several times a day report about UNKNOWNs. I have set unknown_limit to 3 and according to debug it is active. But my problem is that the part of LimitsOld?.pm responsible for this is never called. I have added some more debug code to there (around line 349), and it seems that $onfield->{"state"} is never defined... Do you have any idea why?

            # First we'll need to check whether the user wants to ignore
            # a few UNKNOWN values before actually changing the state to
            # UNKNOWN.
            if ($unknown_limit > 1) {
                DEBUG "[DEBUG] Marki start of unknown; onfield/state= ".$onfield->{"state"};
                if (defined $onfield and defined $onfield->{"state"}) {
                    if ($onfield->{"state"} ne "unknown") {
                        if (defined $onfield->{"num_unknowns"}) {

[german]

Hi. I just wanted to say that I have the exact same issue. I find it difficult to debug....

[german]

The reason why it is not working is as follows:

It seems that on certain ocasions (i've noticed it with Fork yes ) munin-update will not retrive any information about a pluggin, the plugin gets deleted and munin-limits does not save any information about it in the limits file, that is the reason why $onfield->{"state"} is never defined as Marki said. Is there a reason why munin-update might be deleting the plugins?