Isn’t the code wrong? Seems the function checks for disks or unmanaged
device, and if it is unmanaged non-disk device it still kind of
assumes it’s a disk at line 475?
It’s not common, but any device can be unmanaged

> On 14 Feb 2019, at 16:45, Jiří Sléžka <jiri.slezka@slu.cz> wrote:
>
> Hello,
>
> we are using ovirt 4.2.8.2-1.el7.
>
> One our user probably tried to preview taken snapshot but the task is
> stucked and never finished. Also disk is locked.
>
> Here is engine.log
>
> https://pastebin.com/izBJ1BUg
>
> I am not sure what went wrong except one java.lang.NullPointerException
> error... Could it be some bug?
>
> Also I would like to unlock disk and clean this task. I can see locked
> snapshot and disk
>
> [root@ovirt dbutils]# ./unlock_entity.sh -q -t snapshot -c
>
> Locked snapshots
>
>                vm_id                 |             snapshot_id
>
> --------------------------------------+--------------------------------------
> df27ee13-9961-41d5-a4eb-bbb0aadf9086 | 58998020-08cb-4c84-8847-0cb6790724ba
>
> [root@ovirt dbutils]# ./unlock_entity.sh -q -t disk -c
>
> Locked disks
>
>                vm_id                 |               disk_id
>
> --------------------------------------+--------------------------------------
> df27ee13-9961-41d5-a4eb-bbb0aadf9086 | f6405448-baf8-4cc2-8ee7-798ca11cad10
>
> but no runnig tasks
>
> [root@ovirt dbutils]# ./taskcleaner.sh -o
> t
>
> but in ovirt-manager I see this stucked task...
>
> Preview VM Snapshot predsysprep of VM install_10_64bit_LTSB_UK_ucebny -
> Started: Feb 12, 2019, 11:28:04 AM
> Validating - Completed: Feb 12, 2019, 11:28:04 AM
> Executing - Completed: Feb 12, 2019, 11:28:15 AM
> Creating Volume - Completed: Feb 12, 2019, 11:28:15 AM
> Finalizing - Started: Feb 12, 2019, 11:28:15 AM
>
> what is best approach to unlock and clean this?
>
> Thanks in advance,
>
> Cheers, Jiri
>
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