Can not delete images on ZFS over iSCSI storage

[Bitals]

Hello,

I've setted up Proxmox using 2 ZFS over iSCSI shares on FreeNAS for VM storage using this tutorial:
https://forum.proxmox.com/threads/guide-setup-zfs-over-iscsi-with-pve-5x-and-freenas-11.54611/

It have been working great for half a year, but after moving to a different building and to a different network I am no longer able to delete VM images reliably. It works 1 time out of 10 (wanted to get an error to paste here, but it worked first try, lol. But then again failed). The error I am receiving:

Could not remove disk 'SharedVMs:vm-137-disk-2', check manually: error with cfs lock 'storage-SharedVMs': Unable to delete lun /dev/zvol/SharedVMs/vm-137-disk-2 at /usr/share/perl5/PVE/Storage/LunCmd/FreeNAS.pm line 212.
error with cfs lock 'storage-SharedVMs': Unable to delete lun /dev/zvol/SharedVMs/vm-137-disk-0 at /usr/share/perl5/PVE/Storage/LunCmd/FreeNAS.pm line 212.

Please help me troubleshoot this issue.

Also I have an everyday snapshot task and it started to always e-mail me at 2 AM with the text

Subroutine zfs_get_wwid_number redefined at /usr/share/perl5/PVE/Storage/ZFSPlugin.pm line 179, <DATA> line 755.
Subroutine zfs_get_wwid_number redefined at /usr/share/perl5/PVE/Storage/ZFSPlugin.pm line 188, <DATA> line 755.
Subroutine zfs_get_wwid_number redefined at /usr/share/perl5/PVE/Storage/ZFSPlugin.pm line 197, <DATA> line 755.
Subroutine zfs_get_wwid_number redefined at /usr/share/perl5/PVE/Storage/ZFSPlugin.pm line 206, <DATA> line 755.
Subroutine zfs_get_wwid_number redefined at /usr/share/perl5/PVE/Storage/ZFSPlugin.pm line 215, <DATA> line 755.

But it actually succeeds and snapshots are working, tested, so it's less of an issue, but still uncomfortable.

 

[Bitals]

Anyone?

 

[jgross433]

I'm getting the same/similar error when trying to rollback to a snaphot taken of an image stored on FreeNAS via ZFS over iSCSI.

Unable to delete lun /my/lun/path/vm-101-disk-0 at /usr/share/perl5/PVE/Storage/LunCmd/FreeNAS.pm line 212.

 

[mir]

Something must be broken in the FreeNAS-API. Try asking the developer of the FreeNAS-API what is wrong. Using ZFS over iSCSI with Comstar works flawlessly here.