swap rebalance failure in ubuntu longevity

[rebalance:error,2017-08-23T04:31:26.124-07:00,ns_1@172.23.106.14:<0.24744.518>:ns_vbucket_mover:handle_info:202]<0.22809.521> exited with {unexpected_exit,

                           {'EXIT',<0.23480.521>,

                            {{{badmatch,{error,timeout}},

                              {gen_server,call,

                               ['ns_memcached-default',

                                {get_dcp_docs_estimate,725,

                                 "replication:ns_1@172.23.99.168->ns_1@172.23.106.213:default"},

                                180000]}},

                             {gen_server,call,

                              [{'janitor_agent-default','ns_1@172.23.99.168'},

                               {if_rebalance,<0.24744.518>,

                                {wait_dcp_data_move,

                                 ['ns_1@172.23.106.213','ns_1@172.23.99.253'],

                                 725}},

                               infinity]}}}}

[user:error,2017-08-23T04:31:26.125-07:00,ns_1@172.23.106.14:<0.4513.0>:ns_orchestrator:do_log_rebalance_completion:1249]Rebalance exited with reason {unexpected_exit,

                              {'EXIT',<0.23480.521>,

                               {{{badmatch,{error,timeout}},

                                 {gen_server,call,

                                  ['ns_memcached-default',

                                   {get_dcp_docs_estimate,725,

                                    "replication:ns_1@172.23.99.168->ns_1@172.23.106.213:default"},

                                   180000]}},

                                {gen_server,call,

                                 [{'janitor_agent-default',

                                   'ns_1@172.23.99.168'},

                                  {if_rebalance,<0.24744.518>,

                                   {wait_dcp_data_move,

                                    ['ns_1@172.23.106.213',

                                     'ns_1@172.23.99.253'],

                                    725}},

                                  infinity]}}}}