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/*
* Tests that on a successful fcv upgrade, adding new voters to the replica set
* makes replConfig to contain members with 'newlyAdded' field.
*
* This tests behavior centered around FCV upgrade.
* @tags: [multiversion_incompatible]
*/
(function() {
'use strict';
load('jstests/replsets/rslib.js');
// Start a single node replica set.
// Disable Chaining so that initial sync nodes always sync from primary.
const rst = new ReplSetTest({nodes: 1, settings: {chainingAllowed: false}});
rst.startSet();
rst.initiateWithHighElectionTimeout();
const dbName = jsTest.name();
const collName = "coll";
const primary = rst.getPrimary();
const primaryDB = primary.getDB(dbName);
const primaryColl = primaryDB[collName];
const primaryAdminDB = primary.getDB("admin");
// Set FCV to 4.4 to test the upgrade behavior.
assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
assert.commandWorked(primary.adminCommand({clearLog: "global"}));
let startupParams = {};
startupParams['failpoint.initialSyncHangAfterDataCloning'] = tojson({mode: 'alwaysOn'});
jsTestLog("Upgrade FCV to " + latestFCV);
assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: latestFCV}));
jsTestLog("Adding a new voting node (node1) to the replica set");
const node1 = rst.add({rsConfig: {priority: 0, votes: 1}, setParameter: startupParams});
rst.reInitiate();
jsTestLog("Wait for node1 to hang during initial sync");
checkLog.containsJson(node1, 21184);
// Check that 'newlyAdded' field is set.
assert(isMemberNewlyAdded(primary, 1));
assertVoteCount(primary, {
votingMembersCount: 1,
majorityVoteCount: 1,
writableVotingMembersCount: 1,
writeMajorityCount: 1,
totalMembersCount: 2,
});
jsTestLog("Perform test cleanup");
assert.commandWorked(
node1.adminCommand({configureFailPoint: "initialSyncHangAfterDataCloning", mode: 'off'}));
rst.waitForState(node1, ReplSetTest.State.SECONDARY);
// Check if writeConcern: 2 works.
assert.commandWorked(primaryColl.insert({_id: 0}, {"writeConcern": {"w": 2}}));
rst.stopSet();
}());
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