mirror of https://github.com/mongodb/mongo
54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
/**
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* Tests that a $lookup and $graphLookup stage within an aggregation pipeline will read only
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* committed data if the pipeline is using a majority readConcern.
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*
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* @tags: [requires_majority_read_concern]
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*/
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import {testReadCommittedLookup} from "jstests/libs/read_committed_lib.js";
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import {ReplSetTest} from "jstests/libs/replsettest.js";
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import {ShardingTest} from "jstests/libs/shardingtest.js";
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// Confirm majority readConcern works on a replica set.
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const replSetName = "lookup_read_majority";
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let rst = new ReplSetTest({
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nodes: 3,
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name: replSetName,
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nodeOptions: {
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shardsvr: "",
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},
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});
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rst.startSet();
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const nodes = rst.nodeList();
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const config = {
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_id: replSetName,
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members: [
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{_id: 0, host: nodes[0]},
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{_id: 1, host: nodes[1], priority: 0},
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{_id: 2, host: nodes[2], arbiterOnly: true},
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],
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};
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rst.initiate(config);
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let st = new ShardingTest({
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manualAddShard: true,
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});
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// The default WC is majority and stopServerReplication will prevent satisfying any majority writes.
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// We can't run this command on a shard server (configured with --shardsvr) which is why we must run
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// it on mongos.
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assert.commandWorked(
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st.s.adminCommand({setDefaultRWConcern: 1, defaultWriteConcern: {w: 1}, writeConcern: {w: "majority"}}),
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);
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// Even though implicitDefaultWC is set to w:1, addShard will work as CWWC is set.
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assert.commandWorked(st.s.adminCommand({addShard: rst.getURL()}));
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let shardSecondary = rst.getSecondary();
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testReadCommittedLookup(rst.getPrimary().getDB("test"), shardSecondary, rst);
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st.stop();
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rst.stopSet();
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