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Date:      Mon, 04 Jun 2012 15:11:17 -0500
From:      Rusty Nejdl <rnejdl@ringofsaturn.com>
To:        <freebsd-emulation@freebsd.org>
Subject:   Re: one virtualbox vm disrupts all vms and entire network
Message-ID:  <assp.050217e07a.6a54445e6fa4183cff3692d9deed5635@ringofsaturn.com>
In-Reply-To: <CAEXKtDreCQ0O4NAi5opGm_KnR4As=dDvc-zP5Z0z5g84GQQuyg@mail.gmail.com>
References:  <CAEXKtDreCQ0O4NAi5opGm_KnR4As=dDvc-zP5Z0z5g84GQQuyg@mail.gmail.com>

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On 2012-06-02 12:16, Steve Tuts wrote:
> Hi, we have a Dell poweredge server with a dozen interfaces.  It 
> hosts a
> few guests of web app and email servers with VirtualBox-4.0.14.  The 
> host
> and all guests are FreeBSD 9.0 64bit.  Each guest is bridged to a 
> distinct
> interface.  The host and all guests are set to 10.0.0.0 network 
> NAT'ed to a
> cicso router.
>
> This runs well for a couple months, until we added a new guest 
> recently.
> Every few hours, none of the guests can be connected.  We can only 
> connect
> to the host from outside the router.  We can also go to the console 
> of the
> guests (except the new guest), but from there we can't ping the 
> gateway
> 10.0.0.1 any more.  The new guest just froze.
>
> Furthermore, on the host we can see a vboxheadless process for each 
> guest,
> including the new guest.  But we can not kill it, not even with "kill 
> -9".
> We looked around the web and someone suggested we should use "kill
> -SIGCONT" first since the "ps" output has the "T" flag for that
> vboxheadless process for that new guest, but that doesn't help.  We 
> also
> tried all the VBoxManager commands to poweroff/reset etc that new 
> guest,
> but they all failed complaining that vm is in Aborted state.  We also 
> tried
> VBoxManager commands to disconnect the network cable for that new 
> guest, it
> didn't complain, but there was no effect.
>
> For a couple times, on the host we disabled the interface bridging 
> that new
> guest, then that vboxheadless process for that new guest disappeared 
> (we
> attempted to kill it before that).  And immediately all other vms 
> regained
> connection back to normal.
>
> But there is one time even the above didn't help - the vboxheadless 
> process
> for that new guest stubbonly remains, and we had to reboot the host.
>
> This is already a production server, so we can't upgrade virtualbox 
> to the
> latest version until we obtain a test server.
>
> Would you advise:
>
> 1. is there any other way to kill that new guest instead of 
> rebooting?
> 2. what might cause the problem?
> 3. what setting and test I can do to analyze this problem?
> _______________________________________________

I haven't seen any comments on this and don't want you to think you are 
being ignored but I haven't seen this but also, the 4.0 branch was 
buggier for me than the 4.1 releases so yeah, upgrading is probably what 
you are looking at.

Rusty Nejdl



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