Running Drop All can make Ratel unresponsive

[danielmai]

If DropAll takes a while to run Ratel no longer responds to queries or mutations with no indication of work being done.

[paulftw]

Having difficulties reproducing this - tried injecting hooks that caused drop_all to take really long, fail, wait and fail, etc.
d3 ratel seems to perform ok - it's just a background XML RPC that hasn't completed.

@danielmai Is this reproducible with your setup? can it be due to the fact dgraph is busy and unresponsive, which'd make Ratel seem slow?

[paulftw]

Seems like this was a one off issue