repl_test:PRIMARY> db.0917order_totals_b.find()
2018-09-28T15:16:25.627+0800 E QUERY [main] SyntaxError: identifier starts immediately after numeric literal @(shell):1:2

2节点主备复制集

[root@e ~]# cat /usr/local/mongodb/conf/mongod.conf
bind_ip=10.14.14.12
port=27017
dbpath=/mnt/mongodb_data/data
logpath=/mnt/mongodb_data/log/mongod.log
pidfilepath=/usr/local/mongodb/mongo.pid
fork=true
logappend=true
shardsvr=true
directoryperdb=true
replSet=repl_test
keyFile=/usr/local/mongodb/conf/keyFile
[root@e ~]#

删除集合报同样错误

repl_test:PRIMARY> db.0917order_totals.drop()
2018-09-28T15:27:20.825+0800 E QUERY [main] SyntaxError: identifier starts immediately after numeric literal @(shell):1:2
repl_test:PRIMARY>

 变换命名

repl_test:PRIMARY> db.accounting_center_orders.mapReduce(function(){emit(this.service_id,this.val)},function(key,values){return Array.sum(values)},{query:{create_timestamp:{$lt:1537200000,$gt:1537113600}},out:"order_totalsMR"})
{
"result" : "order_totalsMR",
"timeMillis" : 905,
"counts" : {
"input" : 78010,
"emit" : 78010,
"reduce" : 2828,
"output" : 14
},
"ok" : 1
}
repl_test:PRIMARY> show collections

order_totalsMR

repl_test:PRIMARY> db.order_totalsMR.find()
{ "_id" : 0, "value" : 2472975 }
{ "_id" : 1, "value" : -316177.25 }
{ "_id" : 2, "value" : -211655 }
{ "_id" : 4, "value" : -189450 }
{ "_id" : 7, "value" : -7750 }
{ "_id" : 8, "value" : -194385 }
{ "_id" : 10, "value" : -10000 }
{ "_id" : 11, "value" : -184954.40000000005 }
{ "_id" : 13, "value" : -35050 }
{ "_id" : 16, "value" : -30000 }
{ "_id" : 19, "value" : -6000 }
{ "_id" : 20, "value" : -1329.9999999999998 }
{ "_id" : 21, "value" : -361475 }
{ "_id" : 22, "value" : -600 }
repl_test:PRIMARY>

得到预期输入 

 【 集合命名规范 ：英文字母开头】