[rrd-users] rrdtool crash?

Adam Jacob Muller rrdtool-users at adam.gs
Sat Aug 21 23:19:26 CEST 2010

I'm using the newish rrdtool_libdbi stuff to graph some data out of a postgres database and experiencing an odd crash.

# sh graphtest
*** glibc detected *** /usr/bin/rrdtool: double free or corruption (out): 0x00000000020499f0 ***

The actual RRD command i'm running is quite long/complex, but I was able to trigger the crash even with something very simple,
/usr/bin/rrdtool graphv - --width 800 --height 450 --no-minor -M -E --start 1282338588 --end 1282424047 \
        DEF:throughput=sql//pgsql/host=localhost/dbname=dbname/username=username/password=password//table/*timestamp with timezone column/bigint column/keycolumn=simpleint:avg:AVERAGE \

Interestingly, this issue only occurs on specific values of start/end, if I adjust the above to graph like so:
/usr/bin/rrdtool graphv - --width 800 --height 450 --no-minor -M -E --start 1250888943 --end 1282424943 ... etc
It works fine

the first example is a 1-day period (--end now --start now-24 hours)
the second example is a 1-year period (--end now --start now-365 days)

I've put the full output from rrdtool here: http://adam.gs/rrdtool-crash.txt

I am running:
# rrdtool --version
RRDtool 1.4.3  Copyright 1997-2009 by Tobias Oetiker <tobi at oetiker.ch>
               Compiled Aug 21 2010 16:55:06

I appreciate any help you could offer with this,


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