[collectd] exec plugin stuck on mutex
octo at verplant.org
Thu Mar 25 09:45:59 CET 2010
sorry for the late reply, I lost track :/
On Tue, Mar 09, 2010 at 12:24:20PM -0800, Ryan Tomayko wrote:
> > such a weird child. Maybe the signal mask or UID/GID can tell me
> > which step would be the next and might be the failing one.
> You got it:
> # cat /proc/25335/status
> SigBlk: 0000000000000000
Looks like the block mask was already reset. That's the last thing
that's done before calling "exec_child".
> Uid: 0 0 0 0
> Gid: 0 0 0 0
> Groups: 0
Okay, so neither the supplementary groups, the GID nor the UID have been
set. This makes it likely that one of the following calls is causing
the observed behavior:
* getgrnam_r (only if a group was configured)
How do you do authentication on that machine? Are you using LDAP for
I think the best way to know for sure where the process is hanging is by
using a version with debugging symbols available (the Debian package
provides those, for example, but you can also compile with
--enable-debug) and attach a debugger to the process once it's hanging.
Florian octo Forster
Hacker in training
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