I am pretty sure I glimpsed the messages: 
        Child process timeout after 2 seconds.
        Child process exit status 4: lock_held
on several occasions recently, just before my Xserver was restarted and I was 
kicked back to the login prompt.  
I typically ran several parallel bitbake builds. Ubuntu 16.04, not using 
container. The last message in the syslog (first error message) was always:
Fatal IO error 11 (Resource temporarily unavailable) on X server :0

Possibly not related to this problem, nevertheless worth mentioning.

Thanks

Juro


> -----Original Message-----
> From: openembedded-core-boun...@lists.openembedded.org
> [mailto:openembedded-core-boun...@lists.openembedded.org] On Behalf Of
> Seebs
> Sent: Tuesday, September 6, 2016 11:40 PM
> To: Fan, Wenzong (Wind River) <wenzong....@windriver.com>
> Cc: Patches and discussions about the oe-core layer <openembedded-
> c...@lists.openembedded.org>
> Subject: Re: [OE-core] pseudo 1.8.1 doesn't work with docker & dumb-init
> 
> On 7 Sep 2016, at 1:32, wenzong fan wrote:
> 
> > Yes, I believe it's not a 100 reproducible issue. Maybe you could run
> > it with other builds in parallel and try it 3 times or more.
> 
> I can try, but that might need bigger hardware than I have to hand at
> the moment.
> 
> -s
> --
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> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
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