Can a cluster survive leadership death?

[peterstace]

User daviddhc20120601 on discuss reported:

what if i kill the leader of the group?
seems it can not find the leader
looping with the voting system

We need to try to reproduce and fix if this is the case.

[peterstace]

I tried to reproduce this but didn't find any problems.

What I did:

1. Set up a dgraphzero with --replicas=3.
2. Ran up 3 dgraphs. Each joined the same group, and they elected a leader among themselves.
3. I then killed the leader.
4. I observed that the remaining two dgraphs elected a leader among themselves (as expected).