http 500, "timeout / couch_config, set oauth_token_secrets"

Binary package hint: couchdb

it caused HTTP 500 and couchdb described it as
{"error":"timeout","reason":"{gen_server,call,\n [couch_config,\n {set,\"oauth_token_secrets\",\"8glX3Ptqjj0kMp5cwV8c\",\n \"vxmP4JD0g6ftwxF00ZTkFcNM7CbF9wwtHwCk3LXKSPHStDxX8RZJVkqzc3mf5WltR4QF3mlcF9jnqPGJ\",\n true}]}"}
{gen_server,call,2},
             {couch_httpd_misc_handlers,handle_config_req,1},
             {couch_httpd,handle_request,5},
             {mochiweb_http,headers,5},
             {proc_lib,init_p_do_apply,3}