Rebalance swap (9 -> 9) failed with with error message mover_crashed in build 6.5.0-4064

Rebalance test 9->9 node swap failed with below error message in 6.5.0-4064 build . 

 

"completionMessage":"Rebalance exited with reason {mover_crashed,\n {unexpected_exit,\n {'EXIT',<0.14666.20>,\n bulk_set_vbucket_state_failed,\n [{'ns_1@172.23.96.109',\n {'EXIT',\n {{{badmatch,{error,closed,\n [{mc_client_binary,cmd_vocal_recv,5,\n [

{file,\"src/mc_client_binary.erl\"},\n {line,153}]},\n {mc_client_binary,\n wait_for_seqno_persistence,3,\n [{file,"src/mc_client_binary.erl"}

,\n {line,691}]},\n {ns_memcached,\n 'wait_for_seqno_persistence/3-fun-0',\n 3,\n [

{file,\"src/ns_memcached.erl\"}

,\n {line,1258}]},\n

{ns_memcached,\n 'perform_very_long_call/3-fun-0',2,\n [
{file,"src/ns_memcached.erl"}

,\n {line,343}]},\n {ns_memcached_sockets_pool,\n 'executing_on_socket/3-fun-0',3,\n [

{file,\n \"src/ns_memcached_sockets_pool.erl\"}

,\n {line,73}]},\n {async,'async_init/4-fun-2',3,\n [

{file,\"src/async.erl\"}

,\n {line,211}]}]},\n {gen_server,call,\n [

{'janitor_agent-bucket-1',\n 'ns_1@172.23.96.109'}

,\n {if_rebalance,<0.14434.20>,\n {update_vbucket_state,226,replica,\n undefined,'ns_1@172.23.96.101'}},\n infinity]}}}}]},\n [{janitor_agent,bulk_set_vbucket_state,4,\n [

{file,\"src/janitor_agent.erl\"}

,\n {line,432}]},\n {proc_lib,init_p,3,\n [

{file,\"proc_lib.erl\"}

,{line,232}]}]}}}}."}