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// Test that map reduce and aggregate properly handle shard versioning.
(function() {
"use strict";
var st = new ShardingTest({shards: 2, mongos: 3});
var dbName = jsTest.name();
var collName = dbName + ".coll";
var numDocs = 50000;
var numKeys = 1000;
st.s.adminCommand({enableSharding: dbName});
st.ensurePrimaryShard(dbName, 'shard0000');
st.s.adminCommand({shardCollection: collName, key: {key: 1}});
// Load chunk data to the stale mongoses before moving a chunk
var staleMongos1 = st.s1;
var staleMongos2 = st.s2;
staleMongos1.getCollection(collName).find().itcount();
staleMongos2.getCollection(collName).find().itcount();
st.s.adminCommand({split: collName, middle: {key: numKeys/2}});
st.s.adminCommand({moveChunk: collName, find: {key: 0}, to: 'shard0001'});
var bulk = st.s.getCollection(collName).initializeUnorderedBulkOp();
for(var i = 0; i < numDocs; i++) {
bulk.insert({_id: i, key: (i % numKeys), value: i % numKeys});
}
assert.writeOK(bulk.execute());
// Add orphaned documents directly to the shards to ensure they are properly filtered out.
st.shard0.getCollection(collName).insert({_id: 0, key: 0, value: 0});
st.shard1.getCollection(collName).insert({_id: numDocs, key: numKeys, value: numKeys});
jsTest.log("Doing mapReduce");
var map = function(){ emit( this.key, this.value ); };
var reduce = function(k, values){
var total = 0;
for(var i = 0; i < values.length; i++) {
total += values[i];
}
return total;
};
function validateOutput(output) {
assert.eq(output.length, numKeys, tojson(output));
for(var i = 0; i < output.length; i++) {
assert.eq(output[i]._id * (numDocs/numKeys), output[i].value, tojson(output));
}
}
var res = staleMongos1.getCollection(collName).mapReduce(map, reduce, {out: {inline: 1}});
validateOutput(res.results);
jsTest.log("Doing aggregation");
res = staleMongos2.getCollection(collName).aggregate([
{'$group': {_id: "$key", value: {"$sum": "$value"}}},
{'$sort': {_id: 1}}]);
validateOutput(res.toArray());
st.stop();
})();
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