ZFS pool freeze when quota reached

Hello everyone,

We have a Centos 7.2.1511 with a zfs pool that has quota for a few datasets. Each dataset is exported via NFS and mounted on client computers. When any given client hits the dataset quota, the whole pool freezes for a few seconds and then continues normal operations.

We have gzip-9 compression for each dataset but apart from that, default settings.

Has anyone encountered this issue before?

PS: Will try replicating this behavior on a 11.0-RELEASE.