Crash when online write

@JimWen I looked at the shared p directory and I see you have many dgraph.TypeAction keys. The p directory you shared has around 850,000 dgraph.TypeAction keys. These are duplicate keys and that’s why you have big tables.

@martinmr @ashishgoswami do you know why would we have so many duplicate keys?

@JimWen can you please share your complete schema?