82 lines
3.9 KiB
JavaScript
82 lines
3.9 KiB
JavaScript
// When enableMajorityReadConcern=false, a node transitions from ROLLBACK to RECOVERING with an
|
|
// unstable checkpoint with appliedThrough set to the common point. Test that if the node crashes
|
|
// and restarts with the downgraded version before its next stable checkpoint, then oplog entries
|
|
// after the common point are replayed.
|
|
(function() {
|
|
"use strict";
|
|
|
|
load("jstests/replsets/libs/rollback_test.js");
|
|
|
|
TestData.rollbackShutdowns = true;
|
|
TestData.allowUncleanShutdowns = true;
|
|
let name = "downgrade_after_rollback_via_refetch";
|
|
let dbName = "test";
|
|
let sourceCollName = "coll";
|
|
|
|
function testDowngrade(enableMajorityReadConcern, downgradeVersion) {
|
|
jsTest.log("Test downgrade with enableMajorityReadConcern=" + enableMajorityReadConcern +
|
|
" and downgradeVersion: " + downgradeVersion);
|
|
const downgradeFCV = binVersionToFCV(downgradeVersion);
|
|
// Set up Rollback Test.
|
|
let replTest = new ReplSetTest(
|
|
{name, nodes: 3, useBridge: true, nodeOptions: {enableMajorityReadConcern: "false"}});
|
|
replTest.startSet();
|
|
let config = replTest.getReplSetConfig();
|
|
config.members[2].priority = 0;
|
|
config.settings = {chainingAllowed: false};
|
|
replTest.initiateWithHighElectionTimeout(config);
|
|
let rollbackTest = new RollbackTest(name, replTest);
|
|
|
|
// Set the featureCompatibilityVersion to the downgraded version, so that we can downgrade
|
|
// the rollback node.
|
|
assert.commandWorked(
|
|
rollbackTest.getPrimary().adminCommand({setFeatureCompatibilityVersion: downgradeFCV}));
|
|
|
|
let rollbackNode = rollbackTest.transitionToRollbackOperations();
|
|
|
|
// Turn off stable checkpoints on the rollback node.
|
|
assert.commandWorked(
|
|
rollbackNode.adminCommand({configureFailPoint: "disableSnapshotting", mode: "alwaysOn"}));
|
|
|
|
// Wait for a rollback to finish.
|
|
rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
|
|
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
|
|
rollbackTest.transitionToSteadyStateOperations();
|
|
|
|
// Replicate a new operation to the rollback node. Replication is disabled on the tiebreaker
|
|
// node, so a successful majority write guarantees the write has replicated to the rollback
|
|
// node.
|
|
assert.commandWorked(rollbackTest.getPrimary().getDB(dbName)[sourceCollName].insert(
|
|
{_id: 0}, {writeConcern: {w: "majority"}}));
|
|
assert.eq(rollbackNode.getDB(dbName)[sourceCollName].find({_id: 0}).itcount(), 1);
|
|
|
|
// SERVER-47219: The following unclean shutdown followed by a restart into downgradeVersion is
|
|
// not a legal downgrade scenario. However, this illegal downgrade is only prevented when a
|
|
// change across versions requires it. There exists a patch for this test in v4.4 when illegal
|
|
// downgrades are prevented. The patch for that case however requires demonstrating the illegal
|
|
// downgrade is prevented as expected. Applying that here results in a hang. The testing
|
|
// infrastructure for running mongod processes in sufficiently complex scenarios, cannot express
|
|
// both expecting a startup to fail with an error as well as failing immediately if startup
|
|
// succeeds.
|
|
//
|
|
// If this test starts failing on the restart below due to an illegal downgrade, forward-porting
|
|
// the v4.4 patch for SERVER-47219 should be the first thing to try.
|
|
//
|
|
// Kill the rollback node and restart it on the downgraded version.
|
|
rollbackTest.restartNode(
|
|
0, 9, {binVersion: downgradeVersion, enableMajorityReadConcern: enableMajorityReadConcern});
|
|
replTest.awaitSecondaryNodes();
|
|
|
|
// The rollback node should replay the new operation.
|
|
rollbackNode = rollbackTest.getSecondary();
|
|
assert.eq(rollbackNode.getDB(dbName)[sourceCollName].find({_id: 0}).itcount(), 1);
|
|
|
|
rollbackTest.stop();
|
|
}
|
|
|
|
testDowngrade("true", "last-lts");
|
|
testDowngrade("false", "last-lts");
|
|
testDowngrade("true", "last-continuous");
|
|
testDowngrade("false", "last-continuous");
|
|
})();
|