jstests/replsets/rollback_after_disabling_majority_reads.js


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/**
 * This test demonstrates that a rollback immediately after disabling majority reads succeeds.
 * @tags: [requires_persistence]
 */
(function() {
"use strict";

load("jstests/replsets/libs/rollback_test.js");

TestData.rollbackShutdowns = true;
const name = "rollback_after_disabling_majority_reads";
const dbName = "test";
const collName = "coll";

jsTest.log("Set up a Rollback Test with enableMajorityReadConcern=true");
const replTest = new ReplSetTest(
    {name, nodes: 3, useBridge: true, nodeOptions: {enableMajorityReadConcern: "true"}});
replTest.startSet();
let config = replTest.getReplSetConfig();
config.members[2].priority = 0;
config.settings = {
    chainingAllowed: false
};
replTest.initiate(config);
const rollbackTest = new RollbackTest(name, replTest);

const rollbackNode = rollbackTest.transitionToRollbackOperations();
assert.commandWorked(
    rollbackNode.getDB(dbName).runCommand({insert: collName, documents: [{_id: "rollback op"}]}));

jsTest.log("Restart the rollback node with enableMajorityReadConcern=false");
rollbackTest.restartNode(0, 15, {enableMajorityReadConcern: "false"});

rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
rollbackTest.transitionToSteadyStateOperations();

assert.commandWorked(rollbackTest.getPrimary().getDB(dbName)[collName].insert(
    {_id: "steady state op"}, {writeConcern: {w: "majority"}}));

assert.eq(0, rollbackNode.getDB(dbName)[collName].find({_id: "rollback op"}).itcount());
assert.eq(1, rollbackNode.getDB(dbName)[collName].find({_id: "steady state op"}).itcount());

rollbackTest.stop();
}());