[Nfsen-discuss] nfsen error: could not lock RRD

[Chelo M. <che...@re...>]

Hello all,
Im facing  a problem with RRD tools. I have already installed the 
nfsen/nfdum in the production machine. The profiles dir is a NFS 
mounted filesystem in a filer in order to have enough space to store 
all the flows from our backbone.
I get this error when Im running nfsen

May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'flows', profile: 'live': ERROR while updating RRD DB flows.rrd: could
 not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'flows_tcp', profile: 'live': ERROR while updating RRD DB flows_tcp.rr
d: could not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'flows_udp', profile: 'live': ERROR while updating RRD DB flows_udp.rr
d: could not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'flows_icmp', profile: 'live': ERROR while updating RRD DB flows_icmp.
rrd: could not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'flows_other', profile: 'live': ERROR while updating RRD DB flows_othe
r.rrd: could not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'packets', profile: 'live': ERROR while updating RRD DB packets.rrd: c
ould not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'packets_tcp', profile: 'live': ERROR while updating RRD DB packets_tc
p.rrd: could not lock RRD
May  4 13:38:23 fraguelrock nfsen[17592]: ERROR Update RRD time: '200605041320', db: 'packets_udp', profile: 'live': ERROR while updating RRD DB packets_ud
p.rrd: could not lock RRD

The result is no graphics are shown in the nfsen web interface 
although the nfcapd works fine.

I have been looking for this error in goolgle and I found some 
interesting posting in the rrd-user and flowscan mailing list:

http://net.doit.wisc.edu/~plonka/list/flowscan/archive/0265.html
http://net.doit.wisc.edu/~plonka/list/flowscan/archive/0266.html
http://lists.ee.ethz.ch/rrd-users/msg02265.html

Im going to check the ile locking support in my NFS server, but in 
the meanwhile, have you any experience on this topic or have you ever 
deal with this error? If so, how did you solve it?

Cheers,
Chelo