Details
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Bug
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Resolution: Works as Designed
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Major - P3
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None
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4.3.6
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None
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Fully Compatible
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ALL
Description
It seems the 4.4 server no longer returns counts in mapreduce operations.
Following the instructions in https://docs.mongodb.com/manual/reference/command/mapReduce/#out-options, setup as follows:
db.orders.insertMany([
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{ _id: 1, cust_id: "Ant O. Knee", ord_date: new Date("2020-03-01"), price: 25, items: [ { sku: "oranges", qty: 5, price: 2.5 }, { sku: "apples", qty: 5, price: 2.5 } ], status: "A" },
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{ _id: 2, cust_id: "Ant O. Knee", ord_date: new Date("2020-03-08"), price: 70, items: [ { sku: "oranges", qty: 8, price: 2.5 }, { sku: "chocolates", qty: 5, price: 10 } ], status: "A" },
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{ _id: 3, cust_id: "Busby Bee", ord_date: new Date("2020-03-08"), price: 50, items: [ { sku: "oranges", qty: 10, price: 2.5 }, { sku: "pears", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 4, cust_id: "Busby Bee", ord_date: new Date("2020-03-18"), price: 25, items: [ { sku: "oranges", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 5, cust_id: "Busby Bee", ord_date: new Date("2020-03-19"), price: 50, items: [ { sku: "chocolates", qty: 5, price: 10 } ], status: "A"},
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{ _id: 6, cust_id: "Cam Elot", ord_date: new Date("2020-03-19"), price: 35, items: [ { sku: "carrots", qty: 10, price: 1.0 }, { sku: "apples", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 7, cust_id: "Cam Elot", ord_date: new Date("2020-03-20"), price: 25, items: [ { sku: "oranges", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 8, cust_id: "Don Quis", ord_date: new Date("2020-03-20"), price: 75, items: [ { sku: "chocolates", qty: 5, price: 10 }, { sku: "apples", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 9, cust_id: "Don Quis", ord_date: new Date("2020-03-20"), price: 55, items: [ { sku: "carrots", qty: 5, price: 1.0 }, { sku: "apples", qty: 10, price: 2.5 }, { sku: "oranges", qty: 10, price: 2.5 } ], status: "A" },
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{ _id: 10, cust_id: "Don Quis", ord_date: new Date("2020-03-23"), price: 25, items: [ { sku: "oranges", qty: 10, price: 2.5 } ], status: "A" }
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])
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var mapFunction1 = function() {
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emit(this.cust_id, this.price);
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};
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var reduceFunction1 = function(keyCustId, valuesPrices) {
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return Array.sum(valuesPrices);
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};
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Then run:
db.orders.mapReduce(
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mapFunction1,
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reduceFunction1,
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{ out: "map_reduce_example" }
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)
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db.orders.mapReduce(
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mapFunction1,
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reduceFunction1,
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{ out: {inline: 1} }
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)
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4.2 result:
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MongoDB Enterprise ruby-driver-rs:PRIMARY> db.orders.mapReduce(
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... mapFunction1,
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... reduceFunction1,
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... { out: "map_reduce_example" }
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... )
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{
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"result" : "map_reduce_example",
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"timeMillis" : 29,
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"counts" : {
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"input" : 10,
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"emit" : 10,
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"reduce" : 4,
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"output" : 4
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},
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"ok" : 1,
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"$clusterTime" : {
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"clusterTime" : Timestamp(1589906220, 7),
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"signature" : {
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"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
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"keyId" : NumberLong(0)
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}
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},
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"operationTime" : Timestamp(1589906220, 7)
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}
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY> db.orders.mapReduce(
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... mapFunction1,
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... reduceFunction1,
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... { out: {inline: 1} }
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... )
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{
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"results" : [
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{
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"_id" : "Ant O. Knee",
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"value" : 95
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},
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{
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"_id" : "Busby Bee",
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"value" : 125
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},
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{
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"_id" : "Cam Elot",
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"value" : 60
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},
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{
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"_id" : "Don Quis",
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"value" : 155
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}
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],
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"timeMillis" : 14,
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"counts" : {
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"input" : 10,
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"emit" : 10,
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"reduce" : 4,
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"output" : 4
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},
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"ok" : 1,
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"$clusterTime" : {
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"clusterTime" : Timestamp(1589906220, 7),
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"signature" : {
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"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
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"keyId" : NumberLong(0)
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}
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},
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"operationTime" : Timestamp(1589906220, 7)
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}
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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4.4 result:
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MongoDB Enterprise ruby-driver-rs:PRIMARY> db.orders.mapReduce(
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... mapFunction1,
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... reduceFunction1,
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... { out: "map_reduce_example" }
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... )
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{
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"result" : "map_reduce_example",
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"ok" : 1,
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"$clusterTime" : {
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"clusterTime" : Timestamp(1589906282, 6),
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"signature" : {
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"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
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"keyId" : NumberLong(0)
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}
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},
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"operationTime" : Timestamp(1589906282, 6)
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}
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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MongoDB Enterprise ruby-driver-rs:PRIMARY> db.orders.mapReduce(
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... mapFunction1,
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... reduceFunction1,
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... { out: {inline: 1} }
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... )
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{
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"results" : [
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{
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"_id" : "Cam Elot",
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"value" : 60
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},
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{
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"_id" : "Ant O. Knee",
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"value" : 95
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},
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{
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"_id" : "Don Quis",
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"value" : 155
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},
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{
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"_id" : "Busby Bee",
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"value" : 125
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}
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],
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"ok" : 1,
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"$clusterTime" : {
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"clusterTime" : Timestamp(1589906282, 6),
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"signature" : {
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"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
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"keyId" : NumberLong(0)
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}
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},
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"operationTime" : Timestamp(1589906282, 6)
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}
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MongoDB Enterprise ruby-driver-rs:PRIMARY>
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Neither collection nor inline output appear to be producing the counts.
I searched jira for "map reduce counts" and "mapreduce counts" and couldn't locate any tickets where this output would've been intentionally removed.
Attachments
Issue Links
- related to
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MONGOID-4848 Add server 4.4 configurations to evergreen
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- Closed
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