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Re: vzctl enter <VEID> hangs


From: gnu.bash.bug
Subject: Re: vzctl enter <VEID> hangs
Date: Sun, 20 Mar 2011 08:45:10 -0700 (PDT)
User-agent: G2/1.0

Hi!

For those who have not noticed yet...

A new version of vzctl was released which fixes this issue:

http://bugzilla.openvz.org/show_bug.cgi?id=1812#c7

Thanks for all help!

Michael


On 15 mar, 17:03, Chet Ramey <address@hidden> wrote:
> > > So vzctl is running bash in a pty and talking to it that way?
>
> > For the exact details I'll point to the OpenVZ guys :-). It is an OS
> > virtualization patch for the kernel. With it you can run virtual servers
> >  which are isolated from each other.
>
> The answer to my question was "yes."
>
> > What exactly do you want. A full strace report?
>
> That's what I got, and the strace points the finger at vzctl.  It looks
> like a bug in vzctl that was masked by bash-4.1 and previous versions.
>
> > I'm trying to find the difference between 4.1.9 and 4.2.0 which causes
> > this behavior, but that is not simple because I don't know the order and
> > which differences  I must combine. So this process will take a while...
>
> The difference looks to be that bash-4.1 closed fds 3-20 at startup, and
> bash-4.2 sets open fds in that range to close-on-exec.  vzctl is careless
> with its file descriptors, and bash not closing them results in its
> controlling terminal getting messed up.
>
> Michael Kalisz opened a bug report with the openvz group.
>
> Chet
>
> --
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>                  ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, ITS, CWRU   address@hidden    http://cnswww.cns.cwru.edu/~chet/



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