Cannot send zfs snapshot to another host with ZoL 0.6.5.9

[0xFelix]

Currently I'm using PVE 5.1 on my host which comes with ZoL 0.7.2. On my backup server I have running OMV3 which is based on Debian 8 Jessie and comes with ZoL 0.6.5.9. To backup my datasets I'm sending snapshots from my PVE host to OMV3.

Recently I've created a new dataset on ZoL 0.7.2, but I cannot send snapshots of it to my backup host. The backup host receives the full snapshot and then one CPU spins at 100% until I shut it down, the zfs send/recv never completes.

I've seen there are some issues on the ZoL bug tracker concerning that issue and with PR #6616 the issue should have been fixed. According to PVE's release notes/changelog PVE 5.1 has this patch applied? I still encounter this bug and am a bit lost. Any help would be greatly appreciated.

 

[wolfgang]

Hi,

this is an zfs bug fixed in 0.6.5.11 see
https://github.com/zfsonlinux/zfs/issues/5699

So OMV has to update the zfs modules.

 

[0xFelix]

Wasn't PR #6616 supposed to patch this on the zfs 0.7.X side without modifying the 0.6.5.X branch?

See these commits:
https://github.com/zfsonlinux/zfs/commit/48fbb9ddbf2281911560dfbc2821aa8b74127315
https://github.com/zfsonlinux/zfs/commit/829e95c4dc74d7d6d31d01af9c39e03752499b15

They fix issue #5699 and #6616?

 

[wolfgang]

AFIK it fixed only for the receiver side.
0.6.5.x can send to 0.7.x
but not the opposite.

 

[0xFelix]

Upgraded OMV to 0.6.5.11, still same behavior. Guess I need to update to 0.7.X then...

 

[wolfgang]

In bug #6616 gmelikov suggest update both sides, because the are many edge-cases what can be triggered.

 

[0xFelix]

Upgrading to 0.7.3 fixes the issue, although it is a kind of a hack in OMV. Fortunately as of ZoL 0.7.3 DKMS style packages for Debian are available in the build process. I think this issue can be marked as resolved.