syslog-ng-users July 2011 archive
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syslog-ng-users: Re: [syslog-ng] Rpmbuild syslog-ng-3.2.4-1.el6:

Re: [syslog-ng] Rpmbuild syslog-ng-3.2.4-1.el6: FAIL: test_nvtable - glib2 hash table

From: Balazs Scheidler <bazsi_at_nospam>
Date: Thu Jul 14 2011 - 07:16:46 GMT
To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu>

Hi,

On Sat, 2011-06-25 at 04:49 -0400, JP Vossen wrote:
> On 06/24/2011 07:19 AM, Balazs Scheidler wrote:
> > On Mon, 2011-06-20 at 20:59 +0100, Jose Pedro Oliveira wrote:
> >>
> >> There is a problem with the hash table implementation of glib2
> >> version 2.12.3-4 (version that ships in RHEL 5.x).
> >> More details in:
> >>
> >> * https://bugzilla.redhat.com/show_bug.cgi?id=714409#c7
> >
> > Thanks for the information, if it's a glib bug then, can I help you in
> > any way? Or I can "close" the issue?
>
> I see that Jose already forwarded the bug, but I wonder; can you tell me
> what impact the failed test (and thus failed or potentially failed code
> block) may have on syslog-ng run-time on CentOS-5/RHEL5?
>
> Is this hash problem going to cause critical failures? Under what
> circumstances? Or is it, well, it'd be nice if that hash problem didn't
> happen, but it's not a big deal...

Well, it probably mostly depends on why the hashtable collides in that
glib version. This hash is a global hash that maps name-value pairs to
their own unique IDs, which is then used to track name-value pairs in
log messages.

In case the hash table returns non-matching elements, it means that two
(or more) different name-value pairs will map to the same id,
effectively one overwriting the other. Whether it happens in practice
actually depends on what the exact bug in glib is.

-- Bazsi ______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.balabit.com/wiki/syslog-ng-faq