path: root/jstests/replsets/reconstruct_prepared_transactions_initial_sync_no_oplog_application.js

/**
 * Tests that initial sync successfully reconstructs multiple prepared transactions and that we can
 * commit or abort the transactions afterwards. It also tests that after reconstructing a prepared
 * transaction at the end of initial sync, we can successfully apply a commitTransaction oplog entry
 * during secondary oplog application. During initial sync, there will be no oplog entries that
 * need to be applied other than the prepare transaction oplog entries.
 *
 * @tags: [uses_transactions, uses_prepare_transaction]
 */

(function() {
"use strict";

load("jstests/core/txns/libs/prepare_helpers.js");

const replTest = new ReplSetTest({nodes: 2});
replTest.startSet();

const config = replTest.getReplSetConfig();
// Increase the election timeout so that we do not accidentally trigger an election while the
// secondary is restarting.
config.settings = {
    "electionTimeoutMillis": 12 * 60 * 60 * 1000
};
replTest.initiate(config);

const primary = replTest.getPrimary();
let secondary = replTest.getSecondary();

const dbName = "test";
const collName = "reconstruct_prepared_transactions_initial_sync_no_oplog_application";
let testDB = primary.getDB(dbName);
let testColl = testDB.getCollection(collName);

const session1 = primary.startSession();
const sessionDB1 = session1.getDatabase(dbName);
const sessionColl1 = sessionDB1.getCollection(collName);

let session2 = primary.startSession();
let sessionDB2 = session2.getDatabase(dbName);
const sessionColl2 = sessionDB2.getCollection(collName);

let session3 = primary.startSession();
let sessionDB3 = session3.getDatabase(dbName);
const sessionColl3 = sessionDB3.getCollection(collName);

assert.commandWorked(sessionColl1.insert({_id: 1}));
assert.commandWorked(sessionColl2.insert({_id: 2}));
assert.commandWorked(sessionColl3.insert({_id: 3}));

jsTestLog("Preparing three transactions");

session1.startTransaction();
assert.commandWorked(sessionColl1.update({_id: 1}, {_id: 1, a: 1}));
const prepareTimestamp1 = PrepareHelpers.prepareTransaction(session1);

session2.startTransaction();
assert.commandWorked(sessionColl2.update({_id: 2}, {_id: 2, a: 1}));
let prepareTimestamp2 = PrepareHelpers.prepareTransaction(session2);

session3.startTransaction();
assert.commandWorked(sessionColl3.update({_id: 3}, {_id: 3, a: 1}));
const prepareTimestamp3 = PrepareHelpers.prepareTransaction(session3);

const lsid2 = session2.getSessionId();
const txnNumber2 = session2.getTxnNumber_forTesting();

const lsid3 = session3.getSessionId();
const txnNumber3 = session3.getTxnNumber_forTesting();

jsTestLog("Restarting the secondary");

// Restart the secondary with startClean set to true so that it goes through initial sync.
replTest.stop(secondary, undefined /* signal */, {skipValidation: true});
secondary = replTest.start(
    secondary, {startClean: true, setParameter: {'numInitialSyncAttempts': 1}}, true /* wait */);

// Wait for the secondary to complete initial sync.
replTest.awaitSecondaryNodes();

jsTestLog("Initial sync completed");

secondary.setSlaveOk();
const secondaryColl = secondary.getDB(dbName).getCollection(collName);

// Make sure that while reading from the node that went through initial sync, we can't read
// changes to the documents from any of the prepared transactions after initial sync.
const res = secondaryColl.find().sort({_id: 1}).toArray();
assert.eq(res, [{_id: 1}, {_id: 2}, {_id: 3}], res);

jsTestLog("Checking that the first transaction is properly prepared");

// Make sure that we can't read changes to the document from the first prepared transaction
// after initial sync.
assert.eq(secondaryColl.findOne({_id: 1}), {_id: 1});

jsTestLog("Committing the first transaction");

assert.commandWorked(PrepareHelpers.commitTransaction(session1, prepareTimestamp1));
replTest.awaitReplication();

// Make sure that we can see the data from a committed transaction on the secondary if it was
// applied during secondary oplog application.
assert.eq(secondaryColl.findOne({_id: 1}), {_id: 1, a: 1});

jsTestLog("Stepping up the secondary");

// Step up the secondary after initial sync is done and make sure the other two transactions are
// properly prepared.
replTest.stepUp(secondary);
replTest.waitForState(secondary, ReplSetTest.State.PRIMARY);
const newPrimary = replTest.getPrimary();
testDB = newPrimary.getDB(dbName);
testColl = testDB.getCollection(collName);

// Force the second session to use the same lsid and txnNumber as from before the restart. This
// ensures that we're working with the same session and transaction.
session2 = PrepareHelpers.createSessionWithGivenId(newPrimary, lsid2);
session2.setTxnNumber_forTesting(txnNumber2);
sessionDB2 = session2.getDatabase(dbName);

jsTestLog("Checking that the second transaction is properly prepared");

// Make sure that we can't read changes to the document from the second prepared transaction
// after initial sync.
assert.eq(testColl.find({_id: 2}).toArray(), [{_id: 2}]);

// Make sure that another write on the same document from the second transaction causes a write
// conflict.
assert.commandFailedWithCode(
    testDB.runCommand(
        {update: collName, updates: [{q: {_id: 2}, u: {$set: {a: 2}}}], maxTimeMS: 5 * 1000}),
    ErrorCodes.MaxTimeMSExpired);

// Make sure that we cannot add other operations to the second transaction since it is prepared.
assert.commandFailedWithCode(sessionDB2.runCommand({
    insert: collName,
    documents: [{_id: 4}],
    txnNumber: NumberLong(txnNumber2),
    stmtId: NumberInt(2),
    autocommit: false
}),
                             ErrorCodes.PreparedTransactionInProgress);

jsTestLog("Committing the second transaction");

// Make sure we can successfully commit the second transaction after recovery.
assert.commandWorked(sessionDB2.adminCommand({
    commitTransaction: 1,
    commitTimestamp: prepareTimestamp2,
    txnNumber: NumberLong(txnNumber2),
    autocommit: false
}));
assert.eq(testColl.find({_id: 2}).toArray(), [{_id: 2, a: 1}]);

jsTestLog("Attempting to run another transaction on the second session");

// Make sure that we can run another conflicting transaction without any problems.
session2.startTransaction();
assert.commandWorked(sessionDB2[collName].update({_id: 2}, {_id: 2, a: 3}));
prepareTimestamp2 = PrepareHelpers.prepareTransaction(session2);
assert.commandWorked(PrepareHelpers.commitTransaction(session2, prepareTimestamp2));
assert.eq(testColl.findOne({_id: 2}), {_id: 2, a: 3});

// Force the third session to use the same lsid and txnNumber as from before the restart. This
// ensures that we're working with the same session and transaction.
session3 = PrepareHelpers.createSessionWithGivenId(newPrimary, lsid3);
session3.setTxnNumber_forTesting(txnNumber3);
sessionDB3 = session3.getDatabase(dbName);

jsTestLog("Checking that the third transaction is properly prepared");

// Make sure that we can't read changes to the document from the third prepared transaction
// after initial sync.
assert.eq(testColl.find({_id: 3}).toArray(), [{_id: 3}]);

// Make sure that another write on the same document from the third transaction causes a write
// conflict.
assert.commandFailedWithCode(
    testDB.runCommand(
        {update: collName, updates: [{q: {_id: 3}, u: {$set: {a: 2}}}], maxTimeMS: 5 * 1000}),
    ErrorCodes.MaxTimeMSExpired);

// Make sure that we cannot add other operations to the third transaction since it is prepared.
assert.commandFailedWithCode(sessionDB3.runCommand({
    insert: collName,
    documents: [{_id: 4}],
    txnNumber: NumberLong(txnNumber3),
    stmtId: NumberInt(2),
    autocommit: false
}),
                             ErrorCodes.PreparedTransactionInProgress);

jsTestLog("Aborting the third transaction");

// Make sure we can successfully abort the third transaction after recovery.
assert.commandWorked(sessionDB3.adminCommand(
    {abortTransaction: 1, txnNumber: NumberLong(txnNumber3), autocommit: false}));
assert.eq(testColl.find({_id: 3}).toArray(), [{_id: 3}]);

replTest.stopSet();
})();