[collectd] Segfaults with collectd 4.0.5 on RHEL 4 U5 x86_64

[Ulf Zimmermann]

> -----Original Message-----
> From: collectd-bounces at verplant.org
[mailto:collectd-bounces at verplant.org]
> On Behalf Of Ulf Zimmermann
> Sent: Wednesday, August 15, 2007 10:06
> To: Florian Forster
> Cc: collectd at verplant.org
> Subject: Re: [collectd] Segfaults with collectd 4.0.5 on RHEL 4 U5
x86_64
> 
> > -----Original Message-----
> > From: Florian Forster [mailto:octo at verplant.org]
> > Sent: Monday, August 06, 2007 14:30
> > To: Ulf Zimmermann
> > Cc: collectd at verplant.org
> > Subject: Re: [collectd] Segfaults with collectd 4.0.5 on RHEL 4 U5
> x86_64
> >
> > Hi Ulf,
> >
> > On Mon, Aug 06, 2007 at 11:28:37AM -0700, Ulf Zimmermann wrote:
> > > I had two systems where collected died this weekend.
> >
> > do I understand that right that it did work for some time? Those
bugs
> > are of the especially nasty kind :/
> >
> > Since this typo of problem is very hard to reproduce, the best
change
> > you've got is to (re)build collectd with debugging symbols enabled
> > (./configure --enable-debug $OTHER_OPTS), enable the creation of a
> > corefile (ulimit -c unlimited, or similar, depending on your shell)
> and
> > ``hope'' that the issue hits once more.
> >
> > > Aug  4 04:11:09 dbprd01 kernel: collectd[8452]: segfault at
> > > 0000000000000000 rip 0000002a993346d0 rsp 0000000042802300 error 4
> >
> > This isn't of much use, I'm afraid.. What we need to know is the
> > position in the code, not the position in memory. The debugging
> symbols
> > will provide the neccesary glue here. If you have a binary with
> > debugging symbols and you have a corresponding corefile, the bug
> should
> > get it's warm underwear ;)
> 
> #0  0x0000002a95f8d6d0 in ps_read_process (pid=30256, ps=0x43203fb0,
> state=Variable "state" is not available.
> )
>     at processes.c:525
> 525     processes.c: No such file or directory.
>         in processes.c
> 
> That is where died twice on one machine in about 4 hours apart.

Forgot to add, this is with 4.0.6 using --enable-debug.

Ulf.