ZFS Deadlock?

[Emil Muratov]

On 07.03.2015 06:13, Nick Sivo wrote:
> Hi,
>
> One of our servers occasionally exhibits strange behavior under heavy
> IO load. I think, based on the output from procstat -kk -a, it may be
> a ZFS or VFS deadlock. Certain operations, including anything
> involving the ZFS commands like zfs and zpool will hang. Running ls at
> the root of a ZFS filesystem will also hang. Trying to access
> snapshots in the .zfs/ folder will hang. None of these hung processes
> can be killed. Eventually the machine will panic, if we don't reboot
> it first, but that can take days after we start seeing this issue.
> Strangely, our primary application (Hacker News) will keep running
> without interruption until the panic.
>
>
Hi.
What is your hw specs (controller/drives)? I had an issues like yours
some time ago with one of my storages. Not sure what was the cause of
it, there were some parts replaced.