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Date: Thu, 10 Oct 2013 12:32:25 +0300
From: Vitalij Satanivskij <satan@ukr.net>
To: Richard Todd <rmtodd@servalan.servalan.com>
Subject: Re: Assertion in zdb?
Message-ID: <20131010093225.GA30981@hell.ukr.net>
References: <20131009132258.GA85485@hell.ukr.net>
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Cc: Vitalij Satanivskij <satan@ukr.net>, freebsd-current@freebsd.org
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Hello.

Yes, load on machine (on fs) is very extensive.

Ok  thank you for usefull information




Richard Todd wrote:
RT> Vitalij Satanivskij <satan@ukr.net> writes:
RT> 
RT> > Hello. 
RT> >
RT> > System - 10.0-CURRENT FreeBSD 10.0-CURRENT #2 r255173
RT> >
RT> > While trying to get some statistics from zdb 
RT> >
RT> >  zdb -dd disk1 > stat.log
RT> >
RT> > get some assertion: 
RT> >
RT> > Assertion failed: object_count == usedobjs (0x85727 == 0x3aa93d), file /usr/src/cddl/usr.sbin/zdb/../../../cddl/contrib/opensolaris/cmd/zdb/zdb.c, line 1767.
RT> > zsh: abort (core dumped)  zdb -dd disk1 > stat.log
RT> >
RT> > Maybe somebody have any idea about what's it's can be and how big problem it's (or not a problem at all)?
RT> 
RT> Probably not a problem unless it happens reliably when you try it multiple
RT> times.  Since zdb looks at the raw disks, if the filesystem/zpool is active, 
RT> zdb can easily read bits of the zpool metadata off the disks at different
RT> times and thus see an inconsistent state.  Hence trying to get stats out of 
RT> zdb always carries a certain risk of not working.  
RT> 
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