syncoid error - failed: 256 at /usr/sbin/syncoid line 817

[peter-held]

Hi,

after upgrading the operating system from ubuntu 18.04 to ubuntu 20.04 I started to receive this error:

cannot receive: failed to read from stream
CRITICAL ERROR: ssh   -p 11122  -S /tmp/syncoid-replication__@ve1.domain.dom-1633201503 replication__@ve1.domain.dom 'sudo zfs send  -I '"'"'rpool/ROOT/ubuntu'"'"'@'"'"'autosnap_2021-10-02_18:00:05_hourly'"'"' '"'"'rpool/ROOT/ubuntu'"'"'@'"'"'autosnap_2021-10-02_19:00:15_hourly'"'"' | gzip -3 | mbuffer  -q -s 128k -m 16M 2>/dev/null' | mbuffer  -q -s 128k -m 16M 2>/dev/null | zcat  | sudo zfs receive  -s -F 'rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu' 2>&1 failed: 256 at /usr/sbin/syncoid line 817.

When running with '--debug' the output is:

DEBUG: SSHCMD: ssh   -p 11122 
DEBUG: checking availability of gzip on source...
DEBUG: checking availability of gzip on target...
DEBUG: checking availability of gzip on local machine...
DEBUG: checking availability of mbuffer on source...
DEBUG: checking availability of mbuffer on target...
DEBUG: checking availability of pv on local machine...
DEBUG: checking availability of zfs resume feature on source...
DEBUG: checking availability of zfs resume feature on target...
DEBUG: recursive sync of rpool/ROOT/ubuntu.
DEBUG: getting list of child datasets on rpool/ROOT/ubuntu using ssh   -p 11122  -S /tmp/syncoid-replication__@ve1.domain.dom-1633199703 replication__@ve1.domain.dom sudo zfs list -o name,origin -t filesystem,volume -Hr ''"'"'rpool/ROOT/ubuntu'"'"'' |...
DEBUG: syncing source rpool/ROOT/ubuntu to target rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu.
DEBUG: getting current value of syncoid:sync on rpool/ROOT/ubuntu...
ssh   -p 11122  -S /tmp/syncoid-replication__@ve1.domain.dom-1633199703 replication__@ve1.domain.dom sudo zfs get -H syncoid:sync ''"'"'rpool/ROOT/ubuntu'"'"''
DEBUG: checking to see if rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu on  is already in zfs receive using  ps -Ao args= ...
DEBUG: checking to see if target filesystem exists using " sudo zfs get -H name 'rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu' 2>&1 |"...
DEBUG: getting current value of receive_resume_token on rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu...
 sudo zfs get -H receive_resume_token 'rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu'
DEBUG: no receive token found 
DEBUG: getting list of snapshots on rpool/ROOT/ubuntu using ssh   -p 11122  -S /tmp/syncoid-replication__@ve1.domain.dom-1633199703 replication__@ve1.domain.dom sudo zfs get -Hpd 1 -t snapshot guid,creation ''"'"'rpool/ROOT/ubuntu'"'"'' |...
DEBUG: getting list of snapshots on rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu using  sudo zfs get -Hpd 1 -t snapshot guid,creation 'rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu' |...
DEBUG: getting current value of -p used on rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu...
 sudo zfs get -H -p used 'rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu'
DEBUG: checking to see if rpool/backup/ve1.domain.dom/rpool/ROOT/ubuntu on  is already in zfs receive using  ps -Ao args= ...

Both on source and destination a normal user 'replication__' is used. The commands are allowed in sudo.

The snapshots seems to be fine, they are not missing.

I'm using sanoid-2.1.0. Also with previous version I get the same error but on a different line number.

Any help with this ?

Thanks.

[Darkyere]

Its a miss match of ZFS userspace tools and kernel module in 5.11.

Have a look here and see if it matches ur case.

Syncing Issue (Possible duplicate of 678 681 - but my setup is different so didt think i should write it there)

---

Plz. go to this page and vote this is a problem for you too if u read this post.

When using HWE, zfs-kmod and zfs user tools versions must match

[peter-held]

Yes, this seems to be the problem.

Thanks.