[rrd-users] rrdgraph never returns with small step

Josh Wyatt josh.wyatt at hcssystems.com
Sat Jun 21 04:02:37 CEST 2008

Tobias Oetiker wrote:
> Josh,

>> Short of a glibc issue (running 2.3.4...), I'm not sure what could be the issue...
> as I said, run rrdtool under ddd (or some other debugger) and hit
> break when it hangs, this will easily identify the culprit.
> cheers
> tobi

Received the following output under ddd:

GNU DDD 3.3.11 (i686-pc-linux-gnu), by Dorothea Lütkehaus and Andreas Zeller.
Copyright © 1995-1999 Technische Universität Braunschweig, Germany.
Copyright © 1999-2001 Universität Passau, Germany.
Copyright © 2001 Universität des Saarlandes, Germany.
Copyright © 2001-2004 Free Software Foundation, Inc.
(gdb) file /usr/local/rrdtool-1.2.27/bin/rrdtool
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run graph /home/graphs/testcase2/tc2.png -s 1213895143 -e 1213895163 -w 1000 -h 200 -a PNG DEF:00=/home/graphs/testcase2/tc1.rrd:00:AVERAGE LINE1:00#00cccc
Failed to read a valid object file image from memory.
Program received signal SIGINT, Interrupt.
0xb7d7ae83 in _IO_file_open () from /lib/libc.so.6

...I'm assuming it's that open() on /etc/localtime?

I'm going to try upgrading glibc to 2.5 and see what effect this has.


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