IOException in initiateCaptureSnapshot

odl: distribution-karaf-0.6.0-20170411.050836-4837.zip

The test scenario follows the steps of DOMDataBroker testing: Leader Isolation: partition heals within transaction timeout
1) start test-transaction producer, running at 1K tps, non-overlapping, from all nodes to a single shard
2) Isolate leader
3) Wait for followers to initiate election
4) Un-isolate leader
5) Wait for partition to heal - this was done within transaction timeout (30s)

After the followers elected new leader, the node was rejoined (node unblocked via iptables).
Then the test waited for all 3 nodes to be reported correctly. Few seconds after rejoin the node still reported IsolatedLeader raft state and then
started to respond with http status 401 (unauthorized).
This took