Bigcouch: Uncaught error in HTTP request: error, badmatch

we need to investigate if this is bad or can get ignored.

this happened on panda without much traffic:

[Wed, 22 Apr 2015 21:13:28 GMT] [info] [<0.18372.3390>] [b70b9386] undefined - - 'PUT' /tmp_users/75004261c30e4362ad4f63402a8475c7 201
[Wed, 22 Apr 2015 21:13:28 GMT] [info] [<0.18372.3390>] [b70b9386] 127.0.0.1 localhost:4096 PUT /tmp_users/75004261c30e4362ad4f63402a8475c7 201 ok 57
[Wed, 22 Apr 2015 21:13:29 GMT] [info] [<0.18373.3390>] [139b949e] undefined - - 'GET' /users/_design/User/_view/by_login?key=%22test_user_uyshn8k1ela4fq%22&limit=2&include_docs=false&reduce=false 200
[Wed, 22 Apr 2015 21:13:29 GMT] [info] [<0.18373.3390>] [139b949e] 127.0.0.1 localhost:4096 GET /users/_design/User/_view/by_login?key=%22test_user_uyshn8k1ela4fq%22&limit=2&include_docs=false&reduce=false 200 ok 7
[Wed, 22 Apr 2015 21:13:29 GMT] [error] [<0.17849.3390>] [9a95f39d] Uncaught error in HTTP request: {error,
                                                                     {badmatch,
                                                                      {error,
                                                                       {rexi_EXIT,
                                                                        {{killed,
                                                                          {gen_server,
                                                                           call,
                                                                           [<9913.32732.3633>,
                                                                            {set_security,
                                                                             [{<<"admins">>,
                                                                               {[{<<"names">>,
                                                                                  [<<"admin">>]},
                                                                                 {<<"roles">>,
                                                                                  []}]}},
                                                                              {<<"members">>,
                                                                               {[{<<"names">>,
                                                                                  [<<"soledad">>,
                                                                                   <<"leap_mx">>]},
                                                                                 {<<"roles">>,
                                                                                  [<<"replication">>]}]}}]},
                                                                            infinity]}},
                                                                         [{gen_server,
                                                                           call,
                                                                           3,
                                                                           [{file,
                                                                             "gen_server.erl"},
                                                                            {line,
                                                                             188}]},
                                                                          {couch_db,
                                                                           set_security,
                                                                           2,
                                                                           [{file,
                                                                             "src/couch_db.erl"},
                                                                            {line,
                                                                             363}]},
                                                                          {fabric_rpc,
                                                                           with_db,
                                                                           3,
                                                                           [{file,
                                                                             "src/fabric_rpc.erl"},
                                                                            {line,
                                                                             280}]},
                                                                          {rexi_server,
                                                                           init_p,
                                                                           3,
                                                                           [{file,
                                                                             "src/rexi_server.erl"},
                                                                            {line,
                                                                             153}]}]}}}}}

[Wed, 22 Apr 2015 21:13:29 GMT] [info] [<0.18402.3390>] [08757913] undefined - - 'GET' /identities/_design/Identity/_view/by_address_and_destination?key=%5B%22test_user_uyshn8k1ela4fq%40unstable.bitmask.net%22%2C%22test_user_uyshn8k1ela4fq%40unstable.bitmask.net%22%5D&limit=2&include_docs=false&reduce=false 200
[Wed, 22 Apr 2015 21:13:29 GMT] [info] [<0.17849.3390>] [9a95f39d] Stacktrace: [{chttpd_db,db_req,2,
                                                 [{file,"src/chttpd_db.erl"},
                                                  {line,407}]},
                                                {chttpd,handle_request,1,
                                                 [{file,"src/chttpd.erl"},
                                                  {line,198}]},
                                                {mochiweb_http,headers,5,
                                                 [{file,
                                                   "src/mochiweb_http.erl"},
                                                  {line,126}]},
                                                {proc_lib,init_p_do_apply,3,
                                                 [{file,"proc_lib.erl"},
                                                  {line,227}]}]

(from redmine: created on 2015-04-26, closed on 2016-05-26, relates #5226 (closed))