Re: ZFS/zpool command blocks ... locking up all terminals

On 2013-12-20 05:55, O. Hartmann wrote:
> I have a faulty pool with an ambiguous label and I tried to resolve
> that problem. ZFS is at the moment highly active copying data from
> several volumes to another.
>
> Operating system:
>
> 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r259522: Tue Dec 17 19:02:10 CET
> 2013 amd64
>
> In one terminal I exported the pool in question and tried to list it
> via "zpool import". But the this command sequence locks up the terminal
> for an hour up!
>
> In another terminal I tried to issue to command "zpool status" to watch
> the status of the pools (I have several). But this terminal ist alos
> locked up right now!
>
> What is wrong here? I had such an issue in 10.0-CURRENT as well. It
> seems ZFS is locking everything up and can only be brought back by a
> hard reset! What is going on? Why is zpool locking up in trying to
> display a label-scrambled pool while the zpool status is then also
> locked up, but latter is supposed to show the status of the other,
> healthy pools? This reminds me of single-threaded tools which looks up
> every operation consecutively issued after the blocking command.
>
> How is this to be solved?
>
> Oliver
Can you input 'control + t' or otherwise send siginfo to see what run
'state' zpool is in?

This usually consists of the ZFS function name and is often very
revealing and gives a starting point for investigation

-- 
Allan Jude