In cacti there is a zoom tool where you can zoom into rrdtool generated graphs. For some reason if you keep zooming, to a resolution of 5 minutes, no graphs are generated anymore and the rrdtool process hangs in the background while consuming 100% cpu. rrdtool needs to: kill -9 There is also a post on the cacti forums: http://forums.cacti.net/viewtopic.php?p=36336#36336 This makes an ideal DOS attack,.... Reproducible: Always Steps to Reproduce: 1. Select a graph 2. click on the zoom tool 3. select a region that is +- 5 minutes Actual Results: on the webbased userinterface no graph is produced. Meanwhile rrdtool is still active as a process consuming 100% cpu forever. Expected Results: It should keep zooming and generating graphs without consequences. Strange but, apparently all users that are reporting this issue on the cacti.net board are Gentoo Linux users,...... The error can be reproduced on a default installation. The only thing that is changed in this default installation are the RRA values: The ones used by me to generate this problem: Name Steps Rows Timespan Daily (5 Minute Average) 1 600 86400 Weekly (5 Minute Average) 1 2200 604800 Yearly (5 Minute Average) 1 105120 33053184 Monthly (5 Minute Average) 1 9000 2678400 cacti 0.8.6e rrdtool 1.2.6-r1
Hi I'm having this problem too (with Cacti 0.8.6f and RRDtool 1.2.10) on Gentoo x86. Here's my post on the Cacti forum : http://forums.cacti.net/viewtopic.php?t=8357 and on the RRDtool ML : http://lists.ee.ethz.ch/rrd-users/msg10007.html Portage 2.0.51.19 (default-linux/x86/2005.0, gcc-3.3.5-20050130, glibc-2.3.4.20041102-r1, 2.6.11.5 i686) ================================================================= System uname: 2.6.11.5 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz Gentoo Base System version 1.6.12 Python: dev-lang/python-2.3.5 [2.3.5 (#1, May 4 2005, 09:59:21)] dev-lang/python: 2.3.5 sys-apps/sandbox: [Not Present] sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.5, 1.7.9-r1, 1.6.3, 1.8.5-r3, 1.4_p6, 1.9.5 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.16 virtual/os-headers: 2.6.8.1-r4 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=pentium4 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium4 -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" LC_ALL="fr_FR" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.de.gentoo.org/gentoo-portage" USE="x86 alsa apache2 apm arts avi bash-completion berkdb bitmap-fonts cdr crypt cups emboss encode flash foomaticdb fortran gd gdbm gif gpm gtk2 imlib innodb ipv6 jpeg ldap libg++ libwww mad mikmod motif mp3 mpeg mysql ncurses nls odbc oggvorbis opengl oss pam pdflib perl php png python quicktime readline sdl slang snmp spell ssl svga tcpd tiff truetype truetype-fonts type1-fonts xml2 xmms xv zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CBUILD, CTARGET, LANG, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Created attachment 63461 [details] rrd archive, using this makes rrdtool hang with 100% cpu
Comment on attachment 63461 [details] rrd archive, using this makes rrdtool hang with 100% cpu /usr/bin/rrdtool graph - \ --imgformat=PNG \ --start=1121167317 \ --end=1121167660 \ --title="Localhost - Processes" \ --base=1000 \ --height=120 \ --width=500 \ --alt-autoscale-max \ --lower-limit=0 \ COMMENT:"From 2005/07/12 13\:21\:57 To 2005/07/12 13\:27\:40\c" \ COMMENT:" \n" \ --vertical-label="processes" \ --slope-mode \ DEF:a="/var/www/localhost/htdocs/cacti/rra/localhost_proc_7.rrd":proc:AVERAGE \ AREA:a#F51D30:"Running Processes" \ GPRINT:a:LAST:"Current\:%8.0lf" \ GPRINT:a:AVERAGE:"Average\:%8.0lf" \ GPRINT:a:MAX:"Maximum\:%8.0lf"
when I strace this : strace /usr/bin/rrdtool graph - \ --imgformat=PNG \ --start=1121167317 \ --end=1121167660 \ --title="Localhost - Processes" \ --base=1000 \ --height=120 \ --width=500 \ --alt-autoscale-max \ --lower-limit=0 \ COMMENT:"From 2005/07/12 13\:21\:57 To 2005/07/12 13\:27\:40\c" \ COMMENT:" \n" \ --vertical-label="processes" \ --slope-mode \ DEF:a="/var/www/localhost/htdocs/cacti/rra/localhost_proc_7.rrd":proc:AVERAGE \ AREA:a#F51D30:"Running Processes" \ GPRINT:a:LAST:"Current\:%8.0lf" \ GPRINT:a:AVERAGE:"Average\:%8.0lf" \ GPRINT:a:MAX:"Maximum\:%8.0lf" I get an infinite loop: open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 close(3) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 close(3) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 close(3) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 close(3) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 close(3) = 0 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0 {st_mode=S_IFREG|0644, st_size=1067, ...}) = 0
looks as though its been worked upstream. please advice when a new release/workaround is released by the author.
(In reply to comment #5) > looks as though its been worked upstream. Could you point me to your source where you get this information from please?
upgrading to sys-libs/glibc-2.3.5 solves the problem