Steps to replicate:
Let's say a tablet, T1 has three replicas in tablet servers TS1,TS2,TS3.
If TS1 and TS2 are unable to resolve TS3, one of TS1/TS2 ends up crashing during election/pre-elections irrespective of TS3 state (running/not-running):
Sample failure logs:
W0429 04:14:11.043696 801167 leader_election.cc:270] T ecf3e9d1608a4d03ac69a09f0df54b9e P b4eb8f7b19dd4b94a313d8674779b350 [CANDIDATE]: Term 9 election: Was unable to construct an RPC proxy to peer dddc42c5a10b461cb92465815413e996: Network error: unable to resolve address for achennaka-kudu-4.achennaka-kudu.root.hwx.site: Name or service not known. Counting it as a 'NO' vote.
F0429 04:14:11.046133 801167 raft_consensus.cc:2743] Check failed: _s.ok() Bad status: Network error: Could not obtain a remote proxy to the peer.: unable to resolve address for achennaka-kudu-4.achennaka-kudu.root.hwx.site: Name or service not known