perfsonar development work

["Vedrin Jeliazkov" <>]

Hi Sven,

Sven Ubik 
<>
 wrote:

> Hi,
> 
> I am getting empty response from our RRD MA, while rrdtool fetch
> with the same parameters produces valid data. Does anybody have
> any suggestion where can be the problem?
> 
> RRD MA configuration, request and response files are in attachments.
> 
> rrdtool fetch returns the following:
> 
> # rrdtool fetch /usr/local/snmp_mp/cesnet_gn2.rrd AVERAGE -r 60 -s
> 1159254960 -e 1159255080
>                        bytes_in           bytes_out
> 
> 1159255020: 9.4378377833e+06 8.5923076833e+06
> 1159255080: 1.1388552250e+07 1.0209844850e+07
> 1159255140: 1.1294331500e+07 9.4089445833e+06
> 
> Regards,
> 
> Sven Ubik

This sounds like a linker problem. Java RRD MA uses JNI (native) library for
accessing RRDs. The library must exist and ld should know where to find it.
So, please ensure that the files libjrrd.so and rrdjtool.jar exist in the
$PERFSONAR/contrib/rrdjtool/build folder AND this location is known to ld
(either by setting and exporting LD_LIBRARY_PATH or by adding a corresponding
line in ld.so.conf).

If you're going to use LD_LIBRARY_PATH, don't forget to re-initialize it on
each reboot. Some people have reported problems with LD_LIBRARY_PATH being
unexpectedly changed on some Linux flavours, so probably it's better to edit
ld.so.conf

Best regards,
Vedrin