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/**
* Confirms inclusion of a 'transaction' object containing lsid, txnNumber, and txnRetryCounter in
* currentOp() for a prepared transaction and an active non-prepared transaction.
* @tags: [uses_transactions, uses_prepare_transaction]
*/
(function() {
'use strict';
load("jstests/libs/parallel_shell_helpers.js");
function transactionFn(isPrepared) {
const collName = 'currentop_active_transaction';
const session = db.getMongo().startSession({causalConsistency: false});
const sessionDB = session.getDatabase('test');
session.startTransaction({readConcern: {level: 'snapshot'}});
sessionDB[collName].update({}, {x: 2});
if (isPrepared) {
// Load the prepare helpers to be called in the parallel shell.
load('jstests/core/txns/libs/prepare_helpers.js');
const prepareTimestamp = PrepareHelpers.prepareTransaction(session);
PrepareHelpers.commitTransaction(session, prepareTimestamp);
} else {
assert.commandWorked(session.commitTransaction_forTesting());
}
}
function checkCurrentOpFields(currentOp,
isPrepared,
operationTime,
timeBeforeTransactionStarts,
timeAfterTransactionStarts,
timeBeforeCurrentOp) {
const transactionDocument = currentOp[0].transaction;
assert.eq(transactionDocument.parameters.txnNumber,
NumberLong(0),
"Expected 'txnNumber' to be NumberLong(0) but got " +
transactionDocument.parameters.txnRetryCounter +
" instead: " + tojson(transactionDocument));
assert.eq(transactionDocument.parameters.txnRetryCounter,
0,
"Expected 'txnRetryCounter' to be 0 but got " +
transactionDocument.parameters.txnRetryCounter +
" instead: " + tojson(transactionDocument));
assert.eq(transactionDocument.parameters.autocommit,
false,
"Expected 'autocommit' to be false but got " +
transactionDocument.parameters.autocommit +
" instead: " + tojson(transactionDocument));
assert.eq(transactionDocument.parameters.readConcern.level,
'snapshot',
"Expected 'readConcern' level to be snapshot but got " +
tojson(transactionDocument.parameters.readConcern) +
" instead: " + tojson(transactionDocument));
assert.gte(transactionDocument.readTimestamp,
operationTime,
"Expected 'readTimestamp' to be at least " + tojson(operationTime) + " but got " +
tojson(transactionDocument.readTimestamp) +
" instead: " + tojson(transactionDocument));
assert.gte(ISODate(transactionDocument.startWallClockTime),
timeBeforeTransactionStarts,
"Expected 'startWallClockTime' to be at least" +
tojson(timeBeforeTransactionStarts) + " but got " +
transactionDocument.startWallClockTime +
" instead: " + tojson(transactionDocument));
const expectedTimeOpen = (timeBeforeCurrentOp - timeAfterTransactionStarts) * 1000;
assert.gt(transactionDocument.timeOpenMicros,
expectedTimeOpen,
"Expected 'timeOpenMicros' to be at least" + expectedTimeOpen + " but got " +
transactionDocument.timeOpenMicros + " instead: " + tojson(transactionDocument));
assert.gte(transactionDocument.timeActiveMicros,
0,
"Expected 'timeActiveMicros' to be at least 0: " + tojson(transactionDocument));
assert.gte(transactionDocument.timeInactiveMicros,
0,
"Expected 'timeInactiveMicros' to be at least 0: " + tojson(transactionDocument));
const actualExpiryTime = ISODate(transactionDocument.expiryTime).getTime();
const expectedExpiryTime =
ISODate(transactionDocument.startWallClockTime).getTime() + transactionLifeTime * 1000;
assert.eq(expectedExpiryTime,
actualExpiryTime,
"Expected 'expiryTime' to be " + expectedExpiryTime + " but got " + actualExpiryTime +
" instead: " + tojson(transactionDocument));
if (isPrepared) {
assert.gte(
transactionDocument.timePreparedMicros,
0,
"Expected 'timePreparedMicros' to be at least 0: " + tojson(transactionDocument));
}
}
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
const collName = 'currentop_active_transaction';
const testDB = rst.getPrimary().getDB('test');
const adminDB = rst.getPrimary().getDB('admin');
testDB.runCommand({drop: collName, writeConcern: {w: "majority"}});
assert.commandWorked(testDB[collName].insert({x: 1}, {writeConcern: {w: "majority"}}));
// Run an operation prior to starting the transaction and save its operation time. We will use
// this later to assert that our subsequent transaction's readTimestamp is greater than or equal
// to this operation time.
let res = assert.commandWorked(testDB.runCommand({insert: collName, documents: [{x: 1}]}));
// Set and save the transaction's lifetime. We will use this later to assert that our
// transaction's expiry time is equal to its start time + lifetime.
const transactionLifeTime = 10;
assert.commandWorked(
testDB.adminCommand({setParameter: 1, transactionLifetimeLimitSeconds: transactionLifeTime}));
// This will make the transaction hang.
assert.commandWorked(testDB.adminCommand(
{configureFailPoint: 'hangAfterSettingPrepareStartTime', mode: 'alwaysOn'}));
let timeBeforeTransactionStarts = new ISODate();
let isPrepared = true;
const joinPreparedTransaction =
startParallelShell(funWithArgs(transactionFn, isPrepared), rst.ports[0]);
const prepareTransactionFilter = {
active: true,
'lsid': {$exists: true},
'transaction.parameters.txnNumber': {$eq: 0},
'transaction.parameters.autocommit': {$eq: false},
'transaction.timePreparedMicros': {$exists: true}
};
// Keep running currentOp() until we see the transaction subdocument.
assert.soon(function() {
return 1 ===
adminDB.aggregate([{$currentOp: {}}, {$match: prepareTransactionFilter}]).itcount();
});
let timeAfterTransactionStarts = new ISODate();
// Sleep here to allow some time between timeAfterTransactionStarts and timeBeforeCurrentOp to
// elapse.
sleep(100);
let timeBeforeCurrentOp = new ISODate();
// Check that the currentOp's transaction subdocument's fields align with our expectations.
let currentOp = adminDB.aggregate([{$currentOp: {}}, {$match: prepareTransactionFilter}]).toArray();
checkCurrentOpFields(currentOp,
isPrepared,
res.operationTime,
timeBeforeTransactionStarts,
timeAfterTransactionStarts,
timeBeforeCurrentOp);
// Now the transaction can proceed.
assert.commandWorked(
testDB.adminCommand({configureFailPoint: 'hangAfterSettingPrepareStartTime', mode: 'off'}));
joinPreparedTransaction();
// Conduct the same test but with a non-prepared transaction.
res = assert.commandWorked(testDB.runCommand({insert: collName, documents: [{x: 1}]}));
// This will make the transaction hang.
assert.commandWorked(
testDB.adminCommand({configureFailPoint: 'hangDuringBatchUpdate', mode: 'alwaysOn'}));
timeBeforeTransactionStarts = new ISODate();
isPrepared = false;
const joinTransaction = startParallelShell(funWithArgs(transactionFn, isPrepared), rst.ports[0]);
const transactionFilter = {
active: true,
'lsid': {$exists: true},
'transaction.parameters.txnNumber': {$eq: 0},
'transaction.parameters.autocommit': {$eq: false},
'transaction.timePreparedMicros': {$exists: false}
};
// Keep running currentOp() until we see the transaction subdocument.
assert.soon(function() {
return 1 === adminDB.aggregate([{$currentOp: {}}, {$match: transactionFilter}]).itcount();
});
timeAfterTransactionStarts = new ISODate();
// Sleep here to allow some time between timeAfterTransactionStarts and timeBeforeCurrentOp to
// elapse.
sleep(100);
timeBeforeCurrentOp = new ISODate();
// Check that the currentOp's transaction subdocument's fields align with our expectations.
currentOp = adminDB.aggregate([{$currentOp: {}}, {$match: transactionFilter}]).toArray();
checkCurrentOpFields(currentOp,
isPrepared,
res.operationTime,
timeBeforeTransactionStarts,
timeAfterTransactionStarts,
timeBeforeCurrentOp);
// Now the transaction can proceed.
assert.commandWorked(
testDB.adminCommand({configureFailPoint: 'hangDuringBatchUpdate', mode: 'off'}));
joinTransaction();
rst.stopSet();
})();
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