Re: Libvirtd and OSX... with QEMU

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On Sun, Jan 17, 2016 at 10:16:54PM +0000, Justin Clift wrote:
On 17 Jan 2016, at 22:10, Justin Clift <justin@xxxxxxxxxxxxxx> wrote:
On 17 Jan 2016, at 22:04, Justin Clift <justin@xxxxxxxxxxxxxx> wrote:
<snip>
Interestingly on OSX, starting libvirtd (1.3.1) indicates it can see
the installed QEMU.  However, it crashes out shortly afterwards with
a weird error:

2016-01-17 22:02:17.159+0000: 18446744073709551615: error : virEventPollRunOnce:648 : Unable to poll on file handles: Bad file descriptor

Does anyone know what that might be about, and/or how to capture more
meaningful info? :)


With debug level logging, although more verbose there's nothing that
seems smoking-gun like.  Except maybe this?

 2016-01-17 22:07:51.008+0000: 18446744073709551615: debug : virEventPollRunOnce:644 : Poll got error event 9
 2016-01-17 22:07:51.008+0000: 18446744073709551615: error : virEventPollRunOnce:648 : Unable to poll on file handles: Bad file descriptor
 2016-01-17 22:07:51.008+0000: 18446744073709551615: debug : virNetDaemonRun:703 : Loop iteration error, exiting


So we're passing invalid FDs to poll() function.  I can't think of
anything else than bisection or pausing the process around
vireventpoll.c:644 (the call to poll()) and checking what the FDs point
to, which one is the invalid one and then going back to see how it got
there, what is it, who forgot to delete it and so on.

Did this not happen with the release candidates?  Does it happen every
single start?

That's with sudo libvirtd -vl, with tls disabled, tcp enabled, and
tcp auth set to none.

Can post the entire console log output somewhere if that would help, it's
not stupidly long. :)

Debug log here, in case it's useful: :)

https://justinclift.fedorapeople.org/libvirt131/libvirtd131_osx_crash1.log

+ Justin

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