I hope this isn't too much output (I've heard about pastebin.com
but never really used it).
[root@home4 ganglia-3.6.0]# ldd /usr/local/sbin/gmond
linux-vdso.so.1 => (0x00007fff667f6000)
libapr-1.so.0 => /usr/lib64/libapr-1.so.0 (0x00007f6a24049000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x000000337dc00000)
libganglia-3.6.0.so.0 => /usr/local/lib64/libganglia-3.6.0.so.0
(0x00007f6a23e0d000)
libdl.so.2 => /lib64/libdl.so.2 (0x000000337c400000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x0000003390c00000)
libz.so.1 => /lib64/libz.so.1 (0x000000337d000000)
libpcre.so.0 => /lib64/libpcre.so.0 (0x0000003f73600000)
libexpat.so.1 => /lib64/libexpat.so.1 (0x000000337f800000)
libconfuse.so.0 => /usr/lib64/libconfuse.so.0 (0x00007f6a23bff000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x000000337c800000)
libc.so.6 => /lib64/libc.so.6 (0x000000337c000000)
libuuid.so.1 => /lib64/libuuid.so.1 (0x0000003383800000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x000000338c600000)
/lib64/ld-linux-x86-64.so.2 (0x000000337bc00000)
libfreebl3.so => /usr/lib64/libfreebl3.so (0x000000338ca00000)
Below is the tree output:
[root@home4 ganglia-3.6.0]# tree /etc/ganglia
/etc/ganglia
??? conf.d
? ??? procstat.pyconf
??? gmetad.conf
??? gmond.conf
1 directory, 3 files
I looked at the strace file for process 3537 and I did see two places
where gmond does an access() on the python_modules directory.
Does gmond automatically look for the python modes so I don't need
to put them the modules section of gmond.conf?
Thanks a million!
Jeff
Oh I didn't think about going that lowlevel :) Could you run ldd on
gmond also?
Could you also run 'tree' command on /etc/ganglia ? It's interesting
that you have two times msg: "loaded module: python_module" while
starting gmond. Rechecking this with strace log shows that it looks like
double loading of those modules? http://pastebin.com/BjdCGgbj
On Sun, Feb 09, 2014 at 03:28:10PM -0500, Jeff Layton wrote:
On 02/09/2014 02:48 PM, Jeff Layton wrote:
On 02/09/2014 02:28 PM, Maciej Lasyk wrote:
You could also try to catch on which particular check this segfault
happens..?
Not sure how to check this. When I run gmond interactively, it
segfaults just after it says,
[root@home4 yum.repos.d]# /usr/local/sbin/gmond -d 5 -c
/etc/ganglia/gmond.conf
loaded module: core_metrics
loaded module: python_module
loaded module: cpu_module
loaded module: disk_module
loaded module: load_module
loaded module: mem_module
loaded module: net_module
loaded module: proc_module
loaded module: sys_module
loaded module: python_module
Segmentation fault (core dumped)
I'm not sure where to begin checking. I'm a very old-fashioned
debugger - I tend to use a great deal of print statements to
track down where things are happening. I can start doing this
in gmond.
I tried putting fprintf's all over the gmond.c (yep - I'm that
poor of a debugger). I'm not sure but if looks like it segfaults
in the function setup_metric_callbacks on the statement,
if (modp->init && modp->init(global_context)) {
or on the function,
apr_pool_cleanup_register(global_context, modp,
modular_metric_cleanup,
apr_pool_cleanup_null);
I'm not too sure.
I apologize if I'm wasting your time with my poor debugging
skills.
Thanks!
Jeff
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