Date: Tue, 4 Sep 2007 09:48:16 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Kenneth Vestergaard Schmidt <kvs@pil.dk> Cc: freebsd-current@freebsd.org Subject: Re: Unkillable and runaway processes Message-ID: <20070904144815.GB3547@dan.emsphone.com> In-Reply-To: <m1lkbmtw6z.fsf@binarysolutions.dk> References: <m1lkbmtw6z.fsf@binarysolutions.dk>
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In the last episode (Sep 04), Kenneth Vestergaard Schmidt said: > Our ZFS testbed is experiencing some weird problems with rsync. We > run a nightly backup of about 1.6 TB data (that's how much is stored, > not how much is transferred), but after the initial sync I haven't > been able to get the machine through one full cycle. > > After many hours of rsyncing data from 50+ machines, suddenly one > rsync-process will hang, spinning on the CPU. > > It switches state between CPU0, CPU1, RUN and 'zfs:(&', but doesn't > really do anything. It can't be killed, and you can't reboot the > machine - it'll get past syncing disks, but won't shutdown or reboot. The zfs wchan strings are way too long for ps or top to print, but if the rsync is running from a tty somewhere, hit ^T and you'll get the full wait string. -- Dan Nelson dnelson@allantgroup.com
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