The 'zdb -d` will display information about the dataset.

# zdb -d pool | grep pool/data
Could not open pool/data/%recv, error 16
Dataset pool/data [ZPL], ID 291, cr_txg 112281839, 219K, 7 objects

In this particular situation, we had an ongoing recv process which couldn’t read the data from network. Therefore, the zdb command might be a very useful and quick option to solve such situations.