Since Dgraph 1.1.1 and also with Dgraph 1.2.0rc1, several go routines of my parallel tests regularly get stuck at txn.Query()
At the deepest of the stack, they stuck at grpc/internal/transport.(*Stream).waitOnHeader()
I have no clue why it happens, and it is hard to give you a simple example to reproduce the lock.
What could cause that? How can I get debug info about it?