Addendum: Turning off 'netapp.pl' to all filers and selectively turning it on again, it appears that there are no problems with On Tap 7.2.3 and 7.2.4. The error does not show up and all trending (also for other data-dependant trending) show no holes anymore.
But these 7.3.1.1-filers are very important, so I have to turn the monitoring on again on this NetApp-cluster. Will see if debugging the perl script will give more relevant data.
2009/5/29 Peter Welter <peter.welter at gmail.com>:
Hello all,
Last friday may 22 at 8:20 we finished our upgrade from our NetApp-filers (version 7.2.3 to 7.3.1.1). These filers were (and are) monitored by Xymon in combination with the perl-netapp-client. Combined a great combo!
However, since the upgrade I keep getting this error in /var/log/hobbit/rrd-data.log: ... 2009-05-22 08:22:00 xstrdup: Cannot dup NULL string 2009-05-22 08:22:00 Worker process died with exit code 6, terminating ....
This error appears every 5 minutes.
Only one graph-type is not trended anymore since the upgrade, the xtstatscolumn which deliver all statistics about each drive in the filer. (About +/- 20 graphs). Sometimes, it does trend some data but that is for a very short time, let's say 5 or 15 minutes. Then for hours, nothing.
One filer has not been upgraded, but shows the same lack of trending. But that can be caused because I have set it up with MultiThreading (something that can be set using a parameter).
Now I will change this to 1 (for each filer a seperate process) to see if the problem can be narrowed, so I'll update this problem later on this weekend.
Regards, Peter
PS I do not know if this has to do with either Xymon of netapp.pl, but since it is integrated into the Xymon-source (hobbitd/rrd/do_netapp.c) I think it should be posted here.