[Magma] Rebalance failed with mover crashed:"badmatch"

* Created a 3 node cluster(replicas = 1)

* Loaded 10 million items of 250 bytes each

* Added 3 new nodes and triggerd rebalance

* During rebalance new creates and deletions (half of the exisiting elements) was going on

* Rebalance exited with mover_Crashed  "badmatch"

Rebalance exited with reason {mover_crashed,

{unexpected_exit,

{'EXIT',<0.31095.3>,

{{{{badmatch,{error,closed}},

[{mc_client_binary,cmd_vocal_recv,5,

[{file,"src/mc_client_binary.erl"},

{line,155}]},

{mc_client_binary,set_cluster_config,4,

[{file,"src/mc_client_binary.erl"},

{line,743}]},

{ns_memcached,do_handle_call,3,

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

{line,559}]},

{ns_memcached,worker_loop,3,

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

{line,236}]},

{proc_lib,init_p_do_apply,3,

[{file,"proc_lib.erl"},{line,247}]}]},

{gen_server,call,

['ns_memcached-default',

{get_dcp_docs_estimate,127,

"replication:ns_1@172.23.123.8->ns_1@172.23.123.3:default"},

180000]}},

{gen_server,call,

[{'janitor_agent-default',

'ns_1@172.23.123.8'},

{if_rebalance,<0.26959.3>,

{wait_dcp_data_move,

['ns_1@172.23.123.3','ns_1@172.23.123.9'],

127}},

infinity]}}}}}.

Rebalance Operation Id = 3e4ccf2c5cfc66b201a78137a96624b2 hide

./testrunner -i /tmp/ankush.ini  -t rebalance_new.rebalance_in.RebalanceInTests.test_rebalance_in_with_ops,nodes_init=3,nodes_in=3,replicas=1,num_items=10000000,bucket_storage=magma,bucket_eviction_policy=fullEviction,randomize_value=True,vbuckets=128,rerun=false,get-cbcollect-info=True,upgrade_version=7.0.0-2422,skip_cleanup=False