tfork() test hanging in socket_wrapper lock

Jeremy Allison jra at samba.org
Mon Nov 19 18:18:49 UTC 2018


On Mon, Nov 19, 2018 at 07:12:17PM +0100, Andreas Schneider via samba-technical wrote:
> On Monday, 19 November 2018 19:01:18 CET Andrew Bartlett wrote:
> > On Mon, 2018-11-19 at 11:54 +0100, Andreas Schneider wrote:
> > > On Monday, 19 November 2018 03:59:35 CET Andrew Bartlett wrote:
> > > > Today on sn-devel my autobuild hung running the tfork test:
> > > > 
> > > > It appears to be waiting forever for a mutex lock.
> > > 
> > > Anoop and myself tried to reproduce it, but we couldn't. However helgrind
> > > reports several errors in tfork itself.
> > 
> > I should have mentioned, I've left them stuck in case they can be
> > debugged.
> 
> I think Ralph already nailed it. It is an issue with SIGCHLD handling in 
> tfork.
> 
> https://gitlab.com/samba-team/devel/samba/pipelines/37140126
> 
> Already looks good.

Ohh. That was a good catch Ralph ! How did you find that ?



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