There's a problem or a basic conflict between sysutils/zxfer and sysutils/zfstools --- zfstools will happily make and delete snapshots on a schedule. zxfer seems to crash if, after it scans the pool, a snapshot gets deleted.
It would be better if it re-read the pool configuration and then continued to work.
I am looking at making it re-fetch the list of snapshots if the list it has is more than a minute or two old, but have not gotten around to implementing it.
I am planning a totally new tool to replace zxfer, because it fundamentally lacks the ability to handle things like resumable send and bookmarks.
Anyway, please file this upstream with the port here: https://github.com/allanjude/zxfer/issues/new
Assign Allan his own PR.
(Maybe it's a good idea to change MAINTAINER to allanjude@FreeBSD.org on all ports maintained by email@example.com ?)
correction: PR was opened by dgilbert but it's still better to assign it to FreeBSD user name
Any news here?
This is still a known issue.