From owner-freebsd-fs@FreeBSD.ORG  Tue Aug 28 11:47:43 2012
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To: Guido Falsi <mad@madpilot.net>, Matthew Seaman <matthew@FreeBSD.org>
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Date: Tue, 28 Aug 2012 06:47:28 -0500
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From: Mark Felder <feld@feld.me>
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Cc: freebsd-fs@freebsd.org
Subject: Re: ZFS snapshot Folder Disappearing
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On Tue, 28 Aug 2012 01:35:46 -0500, Matthew Seaman <matthew@freebsd.org>  
wrote:

> Interesting.  I do have certain ZFSes null-mounted into a jail.  I
> wonder if that's a common factor?

This has also happened to me. My server has 12GB of RAM, and lots of  
nullfs mounts happen because I run Poudriere.