Rebalance-Out failed with error "badmatch,{error,nxdomain}" on large scale tests.

Large scale test,

Rebalance out fails w/ above error:

Steps
-------------------
110 M items, size 256 bytes,

• Resident Ratio : 10 percent
• 30 K ops/sec on a 4 Node cluster ( mainly sets, 6 K sets/sec)
• Rebalance In - OK
• Failover 1 node , and rebalance out- Fails

Rebalance exited with reason {badmatch,
[{<0.14622.19>,
badmatch,{error,nxdomain,
[

{ns_replicas_builder_utils, kill_a_bunch_of_tap_names,3}

,

{misc,try_with_maybe_ignorant_after,2}

,

{gen_server,terminate,6}

,

{proc_lib,init_p_do_apply,3}

]}}]}

Cluster here:http://soursop-s11202.sc.couchbase.com:8091/

Adding logs.