Bug 435309 - Floating point exception sometimes when running rpm
Summary: Floating point exception sometimes when running rpm
Alias: None
Product: Fedora
Classification: Fedora
Component: rpm
Version: 8
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Panu Matilainen
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2008-02-28 16:53 UTC by Jan ONDREJ
Modified: 2009-01-07 09:29 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2008-11-26 10:04:20 UTC
Type: ---

Attachments (Terms of Use)
rpm core file (612.00 KB, application/octet-stream)
2008-02-28 16:53 UTC, Jan ONDREJ
no flags Details
strace output (22.52 KB, text/plain)
2008-02-28 16:54 UTC, Jan ONDREJ
no flags Details

Description Jan ONDREJ 2008-02-28 16:53:27 UTC
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):

How reproducible:
sometimes :(

Steps to Reproduce:
I don't know, how to reproduce. This not happening always, just sometimes.
Run "rpm" without parameters.
Actual results:
Floating point exception

Expected results:
rpm help page output

Additional info:
strace output and core file is attached.

Comment 1 Jan ONDREJ 2008-02-28 16:53:27 UTC
Created attachment 296235 [details]
rpm core file

Comment 2 Jan ONDREJ 2008-02-28 16:54:21 UTC
Created attachment 296236 [details]
strace output

Comment 3 Jan ONDREJ 2008-02-29 16:58:12 UTC
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.

Comment 4 Panu Matilainen 2008-04-21 09:06:55 UTC
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

Comment 5 Panu Matilainen 2008-05-08 06:41:39 UTC
Fixed upstream

Comment 6 Rolf Linder 2008-07-09 18:09:45 UTC
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)....

Comment 7 Bug Zapper 2008-11-26 09:58:00 UTC
This message is a reminder that Fedora 8 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 8.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '8'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 8's end of life.

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Comment 8 Jan ONDREJ 2008-11-26 10:04:20 UTC
I can't reproduce this bug some time. I think this has been fixed and this bug can be closed.
Thank you.

Comment 9 Fedora Update System 2009-01-07 09:28:45 UTC
rpm- has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

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