Red Hat Bugzilla – Bug 435309
Floating point exception sometimes when running rpm
Last modified: 2009-01-07 04:29:09 EST
Description of problem:
When running rpm on one of my xen virtual machines, rpm fails with "Floating
point exception". Everything other works well on my machines, no crashes,
programs are working.
When this happens, for aprox. 90% running rpm or yum (I don't know about other
programs) fails with FPE. 10% works well.
After some time this fixes itself automatically and then I am unable to
reproduce this bug.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
I don't know, how to reproduce. This not happening always, just sometimes.
Run "rpm" without parameters.
Floating point exception
rpm help page output
strace output and core file is attached.
Created attachment 296235 [details]
rpm core file
Created attachment 296236 [details]
Update: there problems disappear immediatelly after stopping ntpd.
Starts aprox. 1-3 minutes after starting ntpd.
May be it is a bug of any library in linux + xen + ntpd.
Ok, found it. Comes from statistics calculation:
sum_usecs += rpmswDiff(rpmswNow(&end), &begin);
rpmsw_type = 1;
/* Compute cycles/usec */
rpmsw_cycles = sum_cycles/sum_usecs;
If there's no difference between begin of timing and "now", it'll cause division
by zero. Normally there is of course a difference, ntpd being involved kinda
Do have same problem here....Fedora8 running as dom0 but WITHOUT ntpd....I could
sometimes resolv this by restarting xend and libvirt...but only some times.
I've discovered at running yum....(probably yum update)....
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I can't reproduce this bug some time. I think this has been fixed and this bug can be closed.
rpm-22.214.171.124-3.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.