[Twisted-Python] broken buildbots

Tristan Seligmann mithrandi at mithrandi.net
Sat Jun 6 22:13:54 MDT 2015


On Sun, 7 Jun 2015 at 03:43 Glyph <glyph at twistedmatrix.com> wrote:

>
> On Jun 6, 2015, at 6:40 PM, Glyph <glyph at twistedmatrix.com> wrote:
>
> https://buildbot.twistedmatrix.com/buildslaves/hawkowl-debian7-py34 -
> which is apparently maintained by "Your Name Here <
> admin at youraddress.invalid>" - is presently failing all its builds because
> it is running out of memory.  Can someone with access to this box, whoever "
> admin at youraddress.invalid" is, please free up some RAM?
>
> -glyph
>
>
> Oh, I spoke too soon.  All the ENOMEMs are coming out of os.fork, which I
> guess means somehow process spawning got disabled?  I am wondering if the
> buildslave has lingering subprocesses hanging out and blowing its cgroup
> quota inside its docker container (these are running inside docker, right?)
>

ENOMEM on fork() can just mean that overcommit is disabled and there is
insufficient virtual memory available to temporarily accomodate 2x the
process's memory size, even though there is enough memory available to
accomodate 1x.
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