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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.
*
* @tags: [requires_majority_read_concern]
*/
load("jstests/libs/read_committed_lib.js"); // For testReadCommittedLookup
(function() {
"use strict";
// Confirm majority readConcern works on a replica set.
const replSetName = "lookup_read_majority";
let rst = new ReplSetTest({
nodes: 3,
name: replSetName,
nodeOptions: {
enableMajorityReadConcern: "",
shardsvr: "",
}
});
rst.startSet();
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 st = new ShardingTest({
manualAddShard: true,
});
// The default WC is majority and stopServerReplication will prevent satisfying any majority writes.
// We can't run this command on a shard server (configured with --shardsvr) which is why we must run
// it on mongos.
assert.commandWorked(st.s.adminCommand(
{setDefaultRWConcern: 1, defaultWriteConcern: {w: 1}, writeConcern: {w: "majority"}}));
// Even though implicitDefaultWC is set to w:1, addShard will work as CWWC is set.
assert.commandWorked(st.s.adminCommand({addShard: rst.getURL()}));
let shardSecondary = rst.getSecondary();
testReadCommittedLookup(rst.getPrimary().getDB("test"), shardSecondary, rst);
st.stop();
rst.stopSet();
})();
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