libvirt users - May 2017 - Re: No way to stop virStream error after guest stop

Hello everyone,
I am opening a virChannel(unix) to a domain and receiving data with a
non-blocking virStream using events, when the connected domain gets
stopped(which deletes the channel unix socket) by calling destroy,
shutdown, pause or migrate on that domain, with the stream open the read
event is triggered repeatedly, and virStreamRecv returns 0 bytes indicating
 EOF but neither  virStreamFinish nor virStreamFinish is working to stop
the stream to trigger the event . Each time the event is called I got this
errors.

libvirt: I/O Stream Utils error : this function is not supported by
the connection driver: virStreamRecv

libvirt: I/O Stream Utils error : this function is not supported by
the connection driver: virStreamFinish

libvirt: I/O Stream Utils error : this function is not supported by
the connection driver: virStreamEventRemoveCallback


Is there other way to stop getting this errors? or perhaps this is a bug.

Thanks in advance.

Jose Valencia

On Fri, Apr 28, 2017 at 11:01:18PM +0000, JosÉ Luis Valencia Gutierrez
wrote:
>Hello everyone,
>I am opening a virChannel(unix) to a domain and receiving data with a
>non-blocking virStream using events, when the connected domain gets
>stopped(which deletes the channel unix socket) by calling destroy,
>shutdown, pause or migrate on that domain, with the stream open the read
>event is triggered repeatedly, and virStreamRecv returns 0 bytes indicating
> EOF but neither  virStreamFinish nor virStreamFinish is working to stop
>the stream to trigger the event . Each time the event is called I got this
>errors.
>
>libvirt: I/O Stream Utils error : this function is not supported by
>the connection driver: virStreamRecv
>
>libvirt: I/O Stream Utils error : this function is not supported by
>the connection driver: virStreamFinish
>
>libvirt: I/O Stream Utils error : this function is not supported by
>the connection driver: virStreamEventRemoveCallback
>
>
>Is there other way to stop getting this errors? or perhaps this is a bug.
>
This sounds like a bug.  Do you get no other event than just _READABLE?
No _HANGUP or _ERROR?  Does virStreamAbort() work, even though it's
probably not what you are looking for?
>Thanks in advance.
>
>Jose Valencia
>_______________________________________________
>libvirt-users mailing list
>libvirt-users@redhat.com
>https://www.redhat.com/mailman/listinfo/libvirt-users

I get just _READABLE events repeatedly, virStreamAbort() doesn't work, it
gets out of control after the target domain stops and the unix scocket is
deleted. I ended connecting directly to the unix socket. I just wanted to
ask if it certainly is a bug or perhaps someone went through this before
and have a workaround.

Jose V.
Em ter, 16 de mai de 2017 às 05:28, Martin Kletzander
<mkletzan@redhat.com>
escreveu:
> On Fri, Apr 28, 2017 at 11:01:18PM +0000, JosÉ Luis Valencia Gutierrez
> wrote:
> >Hello everyone,
> >I am opening a virChannel(unix) to a domain and receiving data with a
> >non-blocking virStream using events, when the connected domain gets
> >stopped(which deletes the channel unix socket) by calling destroy,
> >shutdown, pause or migrate on that domain, with the stream open the
read
> >event is triggered repeatedly, and virStreamRecv returns 0 bytes
> indicating
> > EOF but neither  virStreamFinish nor virStreamFinish is working to
stop
> >the stream to trigger the event . Each time the event is called I got
this
> >errors.
> >
> >libvirt: I/O Stream Utils error : this function is not supported by
> >the connection driver: virStreamRecv
> >
> >libvirt: I/O Stream Utils error : this function is not supported by
> >the connection driver: virStreamFinish
> >
> >libvirt: I/O Stream Utils error : this function is not supported by
> >the connection driver: virStreamEventRemoveCallback
> >
> >
> >Is there other way to stop getting this errors? or perhaps this is a
bug.
> >
>
> This sounds like a bug.  Do you get no other event than just _READABLE?
> No _HANGUP or _ERROR?  Does virStreamAbort() work, even though it's
> probably not what you are looking for?
>
> >Thanks in advance.
> >
> >Jose Valencia
>
> >_______________________________________________
> >libvirt-users mailing list
> >libvirt-users@redhat.com
> >https://www.redhat.com/mailman/listinfo/libvirt-users
>