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/**
* Tests that a $lookup and $graphLookup stage within an aggregation pipeline will read only
* committed data if the pipeline is using a majority readConcern.
*/
load("jstests/replsets/rslib.js"); // For startSetIfSupportsReadMajority.
load("jstests/libs/read_committed_lib.js"); // For testReadCommittedLookup
(function() {
// Manually create a shard.
const replSetName = "lookup_read_majority";
let rst = new ReplSetTest({
nodes: 3,
name: replSetName,
nodeOptions: {
enableMajorityReadConcern: "",
shardsvr: "",
}
});
if (!startSetIfSupportsReadMajority(rst)) {
jsTest.log("skipping test since storage engine doesn't support committed reads");
rst.stopSet();
return;
}
const nodes = rst.nodeList();
const config = {
_id: replSetName,
members: [
{_id: 0, host: nodes[0]},
{_id: 1, host: nodes[1], priority: 0},
{_id: 2, host: nodes[2], arbiterOnly: true},
]
};
rst.initiate(config);
let shardSecondary = rst._slaves[0];
// Confirm read committed works on a cluster with a database that is not sharding enabled.
let st = new ShardingTest({
manualAddShard: true,
});
assert.commandWorked(st.s.adminCommand({addShard: rst.getURL()}));
testReadCommittedLookup(st.s.getDB("test"), shardSecondary, rst);
// Confirm read committed works on a cluster with:
// - A sharding enabled database
// - An unsharded local collection
assert.commandWorked(st.s.adminCommand({enableSharding: 'test'}));
testReadCommittedLookup(st.s.getDB("test"), shardSecondary, rst);
// Confirm read committed works on a cluster with:
// - A sharding enabled database
// - A sharded local collection.
assert.commandWorked(st.s.getDB("test").runCommand(
{createIndexes: 'local', indexes: [{name: "foreignKey_1", key: {foreignKey: 1}}]}));
assert.commandWorked(st.s.adminCommand({shardCollection: 'test.local', key: {foreignKey: 1}}));
testReadCommittedLookup(st.s.getDB("test"), shardSecondary, rst);
st.stop();
rst.stopSet();
})();
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